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Rana A, Nguyen JH, Renault C, Dick JE. Concentration Enrichment in a Dissolving Microdroplet: Accessing Sub-nanomolar Electroanalysis. Anal Chem 2024; 96:5384-5391. [PMID: 38538561 DOI: 10.1021/acs.analchem.3c04971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/10/2024]
Abstract
Droplet evaporation has previously been used as a concentration enrichment strategy; however, the measurement technique of choice requires quantification in rather large volumes. Electrochemistry has recently emerged as a method to robustly probe volumes even down to the attoliter (10-18 L) level. We present a concentration enrichment strategy based on the dissolution of a microdroplet placed on the surface of a Au ultramicroelectrode (radius ∼ 6.25 μm). By precisely positioning a 1,2-dichloroethane microdroplet onto the ultramicroelectrode with a microinjector, we are able to track the droplet's behavior optically and electrochemically. Because the droplet spontaneously dissolves over time, given the relative solubility of 1,2-dichloroethane in the water continuous phase, the change in volume with time enriches the concentration of the redox probe (Cp2*(Fe)II) in the droplet. We demonstrate robust electrochemical detection down to sub-nM (800 pM) concentrations of Cp2*(Fe)II. For this droplet, 800 pM constitutes only about 106 molecules. We extend the strategy in a single-blind study to determine unknown concentrations, emphasizing the promise of the new methodology. These results take voltammetric quantification easily to the sub-μM regime.
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Affiliation(s)
- Ashutosh Rana
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - James H Nguyen
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Christophe Renault
- Department of Chemistry and Biochemistry, Loyola University, Chicago, Illinois 60660, United States
| | - Jeffrey E Dick
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
- Elmore Family School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
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2
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Eikelboom M, Wang Y, Portlock G, Gourain A, Gardner J, Bullen J, Lewtas P, Carriere M, Alvarez A, Kumar A, O'Prey S, Tölgyes T, Omanović D, Bhowmick S, Weiss D, Salaun P. Voltammetric determination of inorganic arsenic in mildly acidified (pH 4.7) groundwaters from Mexico and India. Anal Chim Acta 2023; 1276:341589. [PMID: 37573093 DOI: 10.1016/j.aca.2023.341589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 06/19/2023] [Accepted: 07/04/2023] [Indexed: 08/14/2023]
Abstract
Routine monitoring of inorganic arsenic in groundwater using sensitive, reliable, easy-to-use and affordable analytical methods is integral to identifying sources, and delivering appropriate remediation solutions, to the widespread global issue of arsenic pollution. Voltammetry has many advantages over other analytical techniques, but the low electroactivity of arsenic(V) requires the use of either reducing agents or relatively strong acidic conditions, which both complicate the analytical procedures, and require more complex material handling by skilled operators. Here, we present the voltammetric determination of total inorganic arsenic in conditions of near-neutral pH using a new commercially available 25 μm diameter gold microwire (called the Gold Wirebond), which is described here for the first time. The method is based on the addition of low concentrations of permanganate (10 μM MnO4-) which fulfils two roles: (1) to ensure that all inorganic arsenic is present as arsenate by chemically oxidising arsenite to arsenate and, (2) to provide a source of manganese allowing the sensitive detection of arsenate by anodic stripping voltammetry at a gold electrode. Tests were carried out in synthetic solutions of various pH (ranging from 4.7 to 9) in presence/absence of chloride. The best response was obtained in 0.25 M chloride-containing acetate buffer resulting in analytical parameters (limit of detection of 0.28 μg L-1 for 10 s deposition time, linear range up to 20 μg L-1 and a sensitivity of 63.5 nA ppb-1. s-1) better than those obtained in acidic conditions. We used this new method to measure arsenic concentrations in contrasting groundwaters: the reducing, arsenite-rich groundwaters of India (West Bengal and Bihar regions) and the oxidising, arsenate-rich groundwaters of Mexico (Guanajuato region). Very good agreement was obtained in all groundwaters with arsenic concentrations measured by inductively coupled plasma-mass spectrometry (slope = +1.029, R2 = 0.99). The voltammetric method is sensitive, faster than other voltammetric techniques for detection of arsenic (typically 10 min per sample including triplicate measurements and 2 standard additions), easier to implement than previous methods (no acidic conditions, no chemical reduction required, reproducible sensor, can be used by non-voltammetric experts) and could enable cheaper groundwater surveying campaigns with in-the-field analysis for quick data reporting, even in remote communities.
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Affiliation(s)
- Martijn Eikelboom
- School of Environmental Sciences, University of Liverpool, 4 Brownlow Street, L69 3GP, Liverpool, UK.
| | - Yaxuan Wang
- School of Environmental Sciences, University of Liverpool, 4 Brownlow Street, L69 3GP, Liverpool, UK
| | - Gemma Portlock
- School of Environmental Sciences, University of Liverpool, 4 Brownlow Street, L69 3GP, Liverpool, UK
| | - Arthur Gourain
- School of Environmental Sciences, University of Liverpool, 4 Brownlow Street, L69 3GP, Liverpool, UK
| | - Joseph Gardner
- School of Environmental Sciences, University of Liverpool, 4 Brownlow Street, L69 3GP, Liverpool, UK
| | - Jay Bullen
- Department of Earth Science and Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK
| | - Paul Lewtas
- School of Science, Edith Cowan University, 270 Joondalup Drive, Joondalup, Western Australia, 6027, Australia
| | - Matthieu Carriere
- Caminos de Agua, José María Correa 23A, Colonia Santa Cecilia, 37727, San Miguel de Allende, Gto, Mexico
| | - Alexandra Alvarez
- Caminos de Agua, José María Correa 23A, Colonia Santa Cecilia, 37727, San Miguel de Allende, Gto, Mexico
| | - Arun Kumar
- Mahavir Cancer Sansthan and Research Centre, Phulwarisharif, Patna, 801505, Bihar, India
| | | | | | - Dario Omanović
- Division for Marine and Environmental Research, Ruđer Bošković Institute, Bijenička 54, 10000, Zagreb, Croatia
| | - Subhamoy Bhowmick
- Kolkata Zonal Center CSIR-National Environmental Engineering Research Institute (NEERI), Kolkata, West Bengal, 700107, India
| | - Dominik Weiss
- Department of Earth Science and Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK
| | - Pascal Salaun
- School of Environmental Sciences, University of Liverpool, 4 Brownlow Street, L69 3GP, Liverpool, UK.
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3
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Patella B, Narayan T, O'Sullivan B, Daly R, Zanca C, Lovera P, Inguanta R, O'Riordan A. Simultaneous detection of copper and mercury in water samples using in-situ pH control with electrochemical stripping techniques. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.141668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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4
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Song ZY, Xiao XY, Chen SH, Li YY, Yang YF, Huang CC, Duan W, Yang M, Li PH, Huang XJ. Sensing Material-Dependent Interference of Multiple Heavy Metal Ions: Experimental and Simulated Thermodynamics Study on Cu(II), Cd(II), and As(III) Electroanalysis. Anal Chem 2022; 94:6225-6233. [PMID: 35404584 DOI: 10.1021/acs.analchem.1c05617] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Interference among multiple heavy metal ions (HMIs) is a significant problem that must be solved in electroanalysis, which extremely restricts the practical popularization of electrochemical sensors. However, due to the limited exploration of the intrinsic mechanism, it is still difficult to confirm the influencing factors. In this work, a series of experimental and theoretical electroanalysis models have been established to investigate the electroanalysis results of Cu(II), Cd(II), As(III), and their mixtures, which were based on the simple structure and stable coordination of nickel single-atom catalysts. X-ray absorption spectroscopy and density functional theory calculations were used to reveal the underlying detection mechanism of the 50-fold boosting effect of Cu(II) on As(III) while Cd(II) inhibits As(III). Combining the application of the thermodynamic model and Fourier transform infrared reflection, the specific interaction of the nanomaterials and HMIs on the interface is considered to be the fundamental source of the interference. This work opens up a new way of thinking about utilizing the unique modes of interplay between nanomaterials and HMIs to achieve anti-interference intelligent electrodes in stripping analysis.
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Affiliation(s)
- Zong-Yin Song
- Key Laboratory of Environmental Optics and Technology, and Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China.,Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Xiang-Yu Xiao
- Key Laboratory of Environmental Optics and Technology, and Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China.,Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Shi-Hua Chen
- Key Laboratory of Environmental Optics and Technology, and Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China.,Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Yong-Yu Li
- Key Laboratory of Environmental Optics and Technology, and Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China.,School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Yuan-Fan Yang
- Key Laboratory of Environmental Optics and Technology, and Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China.,Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Cong-Cong Huang
- Key Laboratory of Environmental Optics and Technology, and Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China.,Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Wanchun Duan
- Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Meng Yang
- Key Laboratory of Environmental Optics and Technology, and Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - Pei-Hua Li
- Key Laboratory of Environmental Optics and Technology, and Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - Xing-Jiu Huang
- Key Laboratory of Environmental Optics and Technology, and Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China.,Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
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5
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Sheng X, Kong L, Wang J, Ding L, Liu Z, Wang S. A phthalimide-based ESIPT fluorescent probe for sensitive detection of Cu2+ in complete aqueous solution. ANAL SCI 2022; 38:689-694. [DOI: 10.1007/s44211-022-00084-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 01/11/2022] [Indexed: 11/30/2022]
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7
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Hu H, Xie B, Lu Y, Zhu J. Advances in Electrochemical Detection Electrodes for As(III). NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:781. [PMID: 35269271 PMCID: PMC8912440 DOI: 10.3390/nano12050781] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/12/2022] [Accepted: 02/17/2022] [Indexed: 02/01/2023]
Abstract
Arsenic is extremely abundant in the Earth's crust and is one of the most common environmental pollutants in nature. In the natural water environment and surface soil, arsenic exists mainly in the form of trivalent arsenite (As(III)) and pentavalent arsenate (As(V)) ions, and its toxicity can be a serious threat to human health. In order to manage the increasingly serious arsenic pollution in the living environment and maintain a healthy and beautiful ecosystem for human beings, it is urgent to conduct research on an efficient sensing method suitable for the detection of As(III) ions. Electrochemical sensing has the advantages of simple instrumentation, high sensitivity, good selectivity, portability, and the ability to be analyzed on site. This paper reviews various electrode systems developed in recent years based on nanomaterials such as noble metals, bimetals, other metals and their compounds, carbon nano, and biomolecules, with a focus on electrodes modified with noble metal and metal compound nanomaterials, and evaluates their performance for the detection of arsenic. They have great potential for achieving the rapid detection of arsenic due to their excellent sensitivity and strong interference immunity. In addition, this paper discusses the relatively rare application of silicon and its compounds as well as novel polymers in achieving arsenic detection, which provides new ideas for investigating novel nanomaterial sensing. We hope that this review will further advance the research progress of high-performance arsenic sensors based on novel nanomaterials.
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Affiliation(s)
- Haibing Hu
- Academy of Opto-Electric Technology, Special Display and Imaging Technology Innovation Center of Anhui Province, National Engineering Laboratory of Special Display Technology, State Key Laboratory of Advanced Display Technology, Collaborative Innovation Center of Advanced Display Technology, Anhui Key Laboratory of Advanced Imaging and Display Technology, Opto-Electric Display Industry Innovation Center, Anhui Province Key Laboratory of Measuring Theory and Precision Instrument, School of Instrument Science and Optoelectronics Engineering, Hefei University of Technology, Hefei 230009, China; (B.X.); (Y.L.)
| | - Baozhu Xie
- Academy of Opto-Electric Technology, Special Display and Imaging Technology Innovation Center of Anhui Province, National Engineering Laboratory of Special Display Technology, State Key Laboratory of Advanced Display Technology, Collaborative Innovation Center of Advanced Display Technology, Anhui Key Laboratory of Advanced Imaging and Display Technology, Opto-Electric Display Industry Innovation Center, Anhui Province Key Laboratory of Measuring Theory and Precision Instrument, School of Instrument Science and Optoelectronics Engineering, Hefei University of Technology, Hefei 230009, China; (B.X.); (Y.L.)
| | - Yangtian Lu
- Academy of Opto-Electric Technology, Special Display and Imaging Technology Innovation Center of Anhui Province, National Engineering Laboratory of Special Display Technology, State Key Laboratory of Advanced Display Technology, Collaborative Innovation Center of Advanced Display Technology, Anhui Key Laboratory of Advanced Imaging and Display Technology, Opto-Electric Display Industry Innovation Center, Anhui Province Key Laboratory of Measuring Theory and Precision Instrument, School of Instrument Science and Optoelectronics Engineering, Hefei University of Technology, Hefei 230009, China; (B.X.); (Y.L.)
| | - Jianxiong Zhu
- School of Mechanical Engineering, Southeast University, Nanjing 211189, China
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Bullen JC, Dworsky LN, Eikelboom M, Carriere M, Alvarez A, Salaün P. Low-cost electrochemical detection of arsenic in the groundwater of Guanajuato state, central Mexico using an open-source potentiostat. PLoS One 2022; 17:e0262124. [PMID: 35045132 PMCID: PMC8769315 DOI: 10.1371/journal.pone.0262124] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Accepted: 12/18/2021] [Indexed: 12/13/2022] Open
Abstract
Arsenic is a carcinogenic groundwater contaminant that is toxic even at the parts-per-billion (ppb) level and its on-site determination remains challenging. Colorimetric test strips, though cheap and widely used, often fail to give reliable quantitative data. On the other hand, electrochemical detection is sensitive and accurate but considerably more expensive at the onset. Here, we present a study on arsenic detection in groundwater using a low-cost, open-source potentiostat based on Arduino technology. We tested different types of gold electrodes (screen-printed and microwire) with anodic stripping voltammetry (ASV), achieving low detection limits (0.7 μg L-1). In a study of arsenic contaminated groundwaters in Mexico, the microwire technique provides greater accuracy than test strips (reducing the median error from -50% to +2.9%) and greater precision (reducing uncertainties from ±25% to ±4.9%). Most importantly, the rate of false negatives versus the World Health Organisation’s 10 μg L-1 limit was reduced from 50% to 0% (N = 13 samples). Arsenic determination using open-source potentiostats may offer a low-cost option for research groups and NGOs wishing to perform arsenic analysis in-house, yielding superior quantitative data than the more widely used colorimetric test strips.
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Affiliation(s)
- Jay C. Bullen
- Department of Earth Science and Engineering, Faculty of Engineering, Imperial College London, London, United Kingdom
- * E-mail: (JCB); (PS)
| | | | - Martijn Eikelboom
- Caminos de Agua, San Miguel de Allende, Guanajuato, Mexico
- Department of Earth, Ocean and Ecological Sciences, School of Environmental Sciences, University of Liverpool, Liverpool, United Kingdom
| | | | | | - Pascal Salaün
- Department of Earth, Ocean and Ecological Sciences, School of Environmental Sciences, University of Liverpool, Liverpool, United Kingdom
- * E-mail: (JCB); (PS)
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9
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Morris A, Serrano N, Díaz-Cruz JM, Bendavid A, Chen M, Vepsäläinen M. Vibrating boron-doped diamond electrode: A new, durable and highly sensitive tool for the detection of cadmium. Anal Chim Acta 2021; 1188:339166. [PMID: 34794577 DOI: 10.1016/j.aca.2021.339166] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 09/16/2021] [Accepted: 10/09/2021] [Indexed: 12/31/2022]
Abstract
In this paper, a vibrating boron-doped diamond (BDD) electrode electroanalytical device and respective method for the analysis of ultralow concentrations of Cd(II) in water were studied. The enhanced mass transfer on the electrode surface was studied using Ru(NH3)6Cl3. Vibration with 133 Hz frequency enhanced the Ru(III) to Ru(II) reduction by 92.6% compared to a static electrode. The peak current of the anodic stripping voltammetry (ASV) method employed was increased by a factor of 5.3 and 4.7 for 10 and 30 μg L-1 Cd(II) concentrations, respectively, when a frequency of 200 Hz was used. A calibration plot with two linear regions was resolved between 0.01 and 1 μg L-1 and 1-30 μg L-1 with the LOD and LOQ of 0.04 μg L-1 and 0.12 μg L-1, respectively. The applicability of the device and the respective method in the analysis of real environmental samples was successfully verified by analysis of river samples and comparing the results with the ICP analysis presenting high reproducibility and trueness. According to the results of this research, the vibrating BDD electrode with the ASV method has excellent analytical performance without surface modification or regular replacement or polishing of the electrode surface. Combining the exceptional electrochemical and chemical properties of BDD with enhanced mass transfer and signal strength of vibrating electrodes makes the system especially suitable for on-site and online analysis of heavy metals.
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Affiliation(s)
- Adam Morris
- CSIRO, Mineral Resources, Private Bag 10, Clayton South, Victoria, 3169, Australia
| | - Núria Serrano
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1-11, 08028, Barcelona, Spain.
| | - José Manuel Díaz-Cruz
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1-11, 08028, Barcelona, Spain
| | - Avi Bendavid
- CSIRO Manufacturing, 36 Bradfield Road, Lindfield, New South Wales, 2070, Australia; School of Materials Science and Engineering, University of New South Wales (UNSW, Sydney), Sydney, NSW, 2052, Australia
| | - Miao Chen
- CSIRO, Mineral Resources, Private Bag 10, Clayton South, Victoria, 3169, Australia
| | - Mikko Vepsäläinen
- CSIRO, Mineral Resources, Private Bag 10, Clayton South, Victoria, 3169, Australia; VTT Technical Research Centre of Finland, P.O. Box 1000, FI-02044, VTT, Finland.
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10
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Trace determination of heavy metals and electrochemical removal of lead from drinking water. CHEMICAL PAPERS 2021. [DOI: 10.1007/s11696-021-01662-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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11
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[Preparation of luminescent silica nanoparticles with immobilized metal ion affinity for labeling phosphorylated proteins in Western Blot]. Se Pu 2021; 39:384-390. [PMID: 34227758 PMCID: PMC9404030 DOI: 10.3724/sp.j.1123.2020.05024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Protein phosphorylation is an important type of post-translational protein modification. In Western Blot experiment, the assay of phosphoproteins need special phospho antibodies, which are expensive, difficult to preserve, poorly reproducible. To this end, the immobilized metal ion affinity luminescent silica nanoparticles for instead of phospho antibodies were prepared. A layer of polymer was created on the surface of the silica nanoparticles via co-polymerization to protect the nanoparticles and to functionalize them with the immobilized metal ion affinity property to specifically label the phosphorylated proteins in Western Blot assays. The affinity luminescent silica nanoparticles were prepared with the following procedure. First, the sol-gel precursor fluorescein isothiocyanate-3-aminopropyltriethoxysilane (FITC-APTES) with the fluorescent moiety was prepared by modifying APTES with FITC. The luminescent silica nanoparticles (FITC@SiO2) were synthesized using the Stöber synthesis method in a reversed microemulsion. Briefly, 123.2 mL of cyclohexane, 25.6 mL of n-hexanol, and 5.44 mL of deionized water were ultrasonically mixed, and then 28.3 g of Triton X-100 were added and the mixture was magnetically stirred for 15 min to form a clear and transparent microemulsion system. Within 10 min, 0.8 mL of FITC-APTES precursor, 1.6 mL of tetraethoxysilane (TEOS), and 0.96 mL of concentrated ammonia (25%-27%, mass fraction) were added to the microemulsion, and the mixture was stirred at 24 ℃ for 24 h. After the reaction, the microemulsion system was destroyed by adding 200 mL of ethanol. The resulting FITC@SiO2 luminescent silica nanoparticles were centrifuged, and washed three times with ethanol. After dryness, the FITC@SiO2 nanoparticles were modified with methacryloxy-propyltrimethoxysilane (MPS) to introduce the double bonds for further modification. The functional monomer nitrilotriacetic acid (NTA) and glycidyl methacrylate (GMA) were copolymerized on the surface of the nanoparticles to convert FITC@SiO2-MPS to FITC@SiO2-MPS-GMA-NTA. The polymer coating of the silica nanoparticles was not only able to protect the silica from hydrolysis, but also to introduce the functional groups of nitrilotriacetic acid, which can chelate with metal ions. Elemental analysis demonstrated that the NTA groups had been bonded to the surface of the nanoparticles via copolymerization. The polymerization did not affect the morphology and fluorescence properties of the nanoparticles. The FITC@SiO2-MPS-GMA-NTA nanoparticles were activated with three different metal ions Zr4+, Fe3+, and Ti4+, for the enrichment of phosphorylated peptides derived form α-casein tryptic digestion. HPLC-MS analysis indicated that the FITC@SiO2-MPS-GMA-NTA-Ti 4+ nanoparticles are the best for the enrichment of phosphorylated peptides. The FITC@SiO2-MPS-GMA-NTA-Ti4+ nanoparticles were used for labelling the phosphorylated proteins in Western Blot experiment. The electrophoretic band of α-casein could be clearly labeled with the FITC@SiO2-MPS-GMA-NTA-Ti 4+ nanoparticles, while the bovine albumin band could not be labelled. This indicates that the luminescent FITC@SiO2-MPS-GMA-NTA-Ti4+nanoparticles can be used to label the phosphorylated proteins in Western Blot experiments.
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Vitali M, Castellani F, Fragassi G, Mascitelli A, Martellucci C, Diletti G, Scamosci E, Astolfi ML, Fabiani L, Mastrantonio R, Protano C, Spica VR, Manzoli L. Environmental status of an Italian site highly polluted by illegal dumping of industrial wastes: The situation 15 years after the judicial intervention. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 762:144100. [PMID: 33360460 DOI: 10.1016/j.scitotenv.2020.144100] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/03/2020] [Accepted: 11/20/2020] [Indexed: 06/12/2023]
Abstract
In 2008 the Italian government classified the Bussi sul Tirino area (Central Italy) as Site of National Interest destined to remediation which, unfortunately, has not yet begun. The decision followed >20 years of illegal dumping of industrial wastes, lasting from 1984 to 2005, that generated the biggest illegal toxic waste disposal site in Europe. The contamination profile of the site was mainly characterized by PCDD/Fs, PCBs, PAHs, chlorinated solvents, Hg, and Pb. Due to the health concern of the population and local authorities, an extensive monitoring and biomonitoring campaign was carried out in 2017-2018, checking the site-specific pollutants in local food (free-range hens' eggs, milk from grazing sheep and goats, wild edible mushrooms, and drinking water), environmental (air and freshwaters) and biological (human urine) matrices. A total of 314 samples were processed, obtaining 3217 analytical data that were compared with regulatory limits, when available, and values reported by international literature. The sum PCDD/Fs and DL-PCBs ranged from 0.24 to 3.6 pg TEQ g-1 fat, and from 0.46 to 8.3 pg TEQ g-1 fat, respectively in milk in eggs, in line with the maximum levels established by CE Regulations except for an egg sample. As regards PAHs, all our results were lower than the literature data, as well as for Hg and Pb. Outdoor air showed levels of chlorinated solvents ranging from <LOD to 36 μg m-3, and freshwaters from 0.21 to 2.8 μg L-1. All drinking water samples resulted compliant with the maximum levels established by the current EU directive. Despite the severe pollution of the illegal dumping site and the remediation not yet carried out, the local environment and the population living in Bussi and surroundings seem not to be affected by significant exposure to the toxics characterizing the landfill.
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Affiliation(s)
- Matteo Vitali
- Department of Public Health and Infectious Diseases, University of Rome La Sapienza, P.le Aldo Moro, 5, 00185 Rome, Italy.
| | - Federica Castellani
- Department of Public Health and Infectious Diseases, University of Rome La Sapienza, P.le Aldo Moro, 5, 00185 Rome, Italy; Department of Ecological and Biological Sciences, Tuscia University, Largo dell'Università snc, 01100 Viterbo, Italy.
| | - Giorgia Fragassi
- Regional Healthcare Agency of Abruzzo, Via Attilio Monti 9, 65127 Pescara, PE, Italy
| | - Alfonso Mascitelli
- Regional Healthcare Agency of Abruzzo, Via Attilio Monti 9, 65127 Pescara, PE, Italy
| | - Cecilia Martellucci
- Department of Biomedical Sciences and Public Health, University of the Marche Region, Via Tronto 10/a, 60020 Torrette di Ancona, AN, Italy
| | - Gianfranco Diletti
- Istituto Zooprofilattico Sperimentale of Abruzzo and Molise "Giuseppe Caporale", via Campo Boario, 64100 Teramo, TE, Italy.
| | - Emanuela Scamosci
- Environmental Protection Regional Agency of Abruzzo, via Marconi 49, 65126 Pescara, PE, Italy.
| | - Maria Luisa Astolfi
- Department of Chemistry, University of Rome La Sapienza, P.le Aldo Moro, 5, 00185 Rome, Italy.
| | - Leila Fabiani
- Department of Life, Health & Environmental Sciences, University of L'Aquila, P.le Salvatore Tommasi 1, 67100 Coppito, L'Aquila, Italy.
| | - Riccardo Mastrantonio
- Department of Life, Health & Environmental Sciences, University of L'Aquila, P.le Salvatore Tommasi 1, 67100 Coppito, L'Aquila, Italy.
| | - Carmela Protano
- Department of Public Health and Infectious Diseases, University of Rome La Sapienza, P.le Aldo Moro, 5, 00185 Rome, Italy.
| | - Vincenzo Romano Spica
- Department of Movement, Human and Health Sciences, University of Rome "Foro Italico", Piazza Lauro De Bosis 6, 00135 Rome, Italy.
| | - Lamberto Manzoli
- Department of Medical Sciences, University of Ferrara, Via Fossato di Mortara 64B, 44121 Ferrara, FE, Italy.
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Preparation of GO/Fe 3O 4@PMDA/AuNPs nanocomposite for simultaneous determination of As 3+ and Cu 2+ by stripping voltammetry. Talanta 2021; 230:122288. [PMID: 33934761 DOI: 10.1016/j.talanta.2021.122288] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 02/23/2021] [Accepted: 02/24/2021] [Indexed: 12/14/2022]
Abstract
One of the critical challenges in the simultaneous determination of As3+ and Cu2+ by stripping voltammetry is the overlapping of their oxidation peaks. Therefore, the engineering of nanostructured sensors in order to uplift their electrochemical performance is a significant issue for the codetection of As3+ and Cu2+. Herein, we modified a glassy carbon electrode with a new nanocomposite based on poly methyldopa along with gold nanoparticles immobilized on the surface of magnetic graphene oxide (GCE/GO/Fe3O4@PMDA/AuNPs) that can determine As3+ and Cu2+ with great sensitivity. Optimization of the measurement conditions by square wave stripping voltammetry (SWSV) caused the oxidation peaks of As3+ and Cu2+ to be distinguished significantly from each other, while the peak currents of As3+ and Cu2+ increased 9-12 fold, respectively, compared to the bare electrode. The proposed electrode exhibits low detection limits (S/N ≥ 3): 0.15 ppb for As3+ and 0.11 ppb for Cu2+. The GCE/GO/Fe3O4@PMDA/AuNPs also has good linearity over a wide concentration range from 5 to 500 ppb for As3+ and 0.5-750 ppb for Cu2+. The good recovery values were obtained for the analysis of As3+ and Cu2+ in pool and drinking water samples.
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14
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Núñez C, Triviño JJ, Arancibia V. A electrochemical biosensor for As(III) detection based on the catalytic activity of Alcaligenes faecalis immobilized on a gold nanoparticle-modified screen-printed carbon electrode. Talanta 2021; 223:121702. [PMID: 33298256 DOI: 10.1016/j.talanta.2020.121702] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 09/20/2020] [Accepted: 09/21/2020] [Indexed: 01/01/2023]
Abstract
A electrochemical biosensor for As(III) determination has been developed by immobilization of the Alcaligenis faecalis bacteria on gold nanoparticle-modified screen-printed carbon electrode (AuNPs-SPCE). The detection of As(III) is due to the catalytic activity of arsenite oxidase enzyme which oxidizes As(III) to As(V) producing an analytical signal. To enhance the performance of the biosensor, was optimized the amount of bacteria, amount of glutaraldehyde and incubation time applied in the preparation of the electrode, in addition to the effect of pH and applied potential. The analytical application was carried out applying 300 mV (pH = 7) obtaining a LOD of 6.61 μmol L-1 (R = 0.9975) and 700 mV (pH = 12) obtaining a LOD of 1.84 μmol L-1 (R = 0.9983). AF/AuNPs-SPCE was applied to the determination of total arsenic in Loa river water samples after reduction, with satisfactory results.
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Affiliation(s)
- Claudia Núñez
- Pontificia Universidad Católica de Chile, Chemistry and Pharmacy Faculty, Santiago, 7820436, Chile.
| | - Juan José Triviño
- Pontificia Universidad Católica de Chile, Chemistry and Pharmacy Faculty, Santiago, 7820436, Chile
| | - Verónica Arancibia
- Pontificia Universidad Católica de Chile, Chemistry and Pharmacy Faculty, Santiago, 7820436, Chile.
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15
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Sedki M, Zhao G, Ma S, Jassby D, Mulchandani A. Linker-Free Magnetite-Decorated Gold Nanoparticles (Fe 3O 4-Au): Synthesis, Characterization, and Application for Electrochemical Detection of Arsenic (III). SENSORS (BASEL, SWITZERLAND) 2021; 21:883. [PMID: 33525604 PMCID: PMC7866134 DOI: 10.3390/s21030883] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 01/23/2021] [Accepted: 01/25/2021] [Indexed: 01/17/2023]
Abstract
Linker-free magnetite nanoparticles (Fe3O4NPs)-decorated gold nanoparticles (AuNPs) were grown using a new protocol that can be used as a new platform for synthesis of other intact metal-metal oxide nanocomposites without the need for linkers. This minimizes the distance between the metal and metal oxide nanoparticles and ensures the optimum combined effects between the two material interfaces. X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy confirmed the successful synthesis of the Fe3O4-Au nanocomposite, without any change in the magnetite phase. Characterization, using transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) spectroscopy, revealed the composite to consist of AuNPs of 70 ± 10 nm diameter decorated with tiny 10 ± 3 nm diameter Fe3O4NPs in Au:Fe mass ratio of 5:1. The prepared Fe3O4-Au nanocomposite was embedded in ionic liquid (IL) and applied for the modification of glassy carbon electrode (GCE) for the electrochemical detection of As(III) in water. By combining the excellent catalytic properties of the AuNPs with the high adsorption capacity of the tiny Fe3O4NPs towards As(III), as well as the good conductivity of IL, the Fe3O4-Au-IL nanocomposite showed excellent performance in the square wave anodic stripping voltammetry detection of As(III). Under the optimized conditions, a linear range of 1 to 100 μg/L was achieved with a detection limit of 0.22 μg/L (S/N = 3), and no interference from 100-fold higher concentrations of a wide variety of cations and anions found in water. A very low residual standard deviation of 1.16% confirmed the high precision/reproducibility of As(III) analysis and the reliability of the Fe3O4-Au-IL sensing interface. Finally, this proposed sensing interface was successfully applied to analyzing synthetic river and wastewater samples with a 95-101% recovery, demonstrating excellent accuracy, even in complex synthetic river and wastewater samples containing high concentrations of humic acid without any sample pretreatments.
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Affiliation(s)
- Mohammed Sedki
- Materials Science and Engineering Program, University of California, Riverside, CA 92521, USA;
| | - Guo Zhao
- Department of Chemical and Environmental Engineering, University of California, Riverside, CA 92521, USA;
| | - Shengcun Ma
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, USA; (S.M.); (D.J.)
| | - David Jassby
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, USA; (S.M.); (D.J.)
| | - Ashok Mulchandani
- Department of Chemical and Environmental Engineering, University of California, Riverside, CA 92521, USA;
- Center for Environmental Research and Technology (CE-CERT), University of California, Riverside, CA 92507, USA
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16
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Curulli A. Nanomaterials in Electrochemical Sensing Area: Applications and Challenges in Food Analysis. Molecules 2020; 25:E5759. [PMID: 33297366 PMCID: PMC7730649 DOI: 10.3390/molecules25235759] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 12/03/2020] [Accepted: 12/04/2020] [Indexed: 02/01/2023] Open
Abstract
Recently, nanomaterials have received increasing attention due to their unique physical and chemical properties, which make them of considerable interest for applications in many fields, such as biotechnology, optics, electronics, and catalysis. The development of nanomaterials has proven fundamental for the development of smart electrochemical sensors to be used in different application fields such, as biomedical, environmental, and food analysis. In fact, they showed high performances in terms of sensitivity and selectivity. In this report, we present a survey of the application of different nanomaterials and nanocomposites with tailored morphological properties as sensing platforms for food analysis. Particular attention has been devoted to the sensors developed with nanomaterials such as carbon-based nanomaterials, metallic nanomaterials, and related nanocomposites. Finally, several examples of sensors for the detection of some analytes present in food and beverages, such as some hydroxycinnamic acids (caffeic acid, chlorogenic acid, and rosmarinic acid), caffeine (CAF), ascorbic acid (AA), and nitrite are reported and evidenced.
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Affiliation(s)
- Antonella Curulli
- Istituto per lo Studio dei Materiali Nanostrutturati (ISMN) CNR, Via del Castro Laurenziano 7, 00161 Roma, Italy
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17
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Lalmalsawmi J, Tiwari D, Kim DJ. Role of nanocomposite materials in the development of electrochemical sensors for arsenic: Past, present and future. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114630] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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18
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Sall ML, Fall B, Diédhiou I, Dièye EH, Lo M, Diaw AKD, Gningue-Sall D, Raouafi N, Fall M. Toxicity and Electrochemical Detection of Lead, Cadmium and Nitrite Ions by Organic Conducting Polymers: A Review. CHEMISTRY AFRICA-A JOURNAL OF THE TUNISIAN CHEMICAL SOCIETY 2020. [DOI: 10.1007/s42250-020-00157-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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19
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Sullivan C, Lu D, Brack E, Drew C, Kurup P. Voltammetric codetection of arsenic(III) and copper(II) in alkaline buffering system with gold nanostar modified electrodes. Anal Chim Acta 2020; 1107:63-73. [DOI: 10.1016/j.aca.2020.02.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 01/30/2020] [Accepted: 02/06/2020] [Indexed: 11/29/2022]
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20
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Bu L, Xie Q, Ming H. Simultaneous sensitive analysis of Cd( ii), Pb( ii) and As( iii) using a dual-channel anodic stripping voltammetry approach. NEW J CHEM 2020. [DOI: 10.1039/d0nj00545b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A dual-channel anodic stripping voltammetry protocol is proposed for the simultaneous detection of trace heavy metals in one experiment with high sensitivity.
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Affiliation(s)
- Lijuan Bu
- State Key Laboratory of Toxicology and Medical Countermeasures, and Laboratory of Toxicant Analysis
- Institute of Pharmacology and Toxicology
- Academy of Military Medical Sciences
- Beijing 100850
- P. R. China
| | - Qingji Xie
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- P. R. China
| | - Hai Ming
- Research Institute of Chemical Defence
- Beijing 100191
- China
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21
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Xu Y, Dai Y, Li C, Zhang H, Guo M, Yang Y. PC software-based portable cyclic voltammetry system with PB-MCNT-GNPs-modified electrodes for E. coli detection. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2020; 91:014103. [PMID: 32012638 DOI: 10.1063/1.5113655] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 12/19/2019] [Indexed: 06/10/2023]
Abstract
PC software-based portable cyclic voltammetry (PCV) systems have the advantages of portability, high performance, and real-time detection. In this paper, the PCV system used cyclic voltammetry (CV) as the main detection and analysis method and contained the following components: a three-electrode unit, a portable potentiostat, and PC software. The PC software was used as the system control and display, and a dynamic peak position adjustment (DPPA) algorithm for E. coli measurements based on thick biofilm modification on electrodes was designed especially for this system to realize the real-time correspondence between the measured results and the modified electrodes. The performance test results obtained by setting different detection parameters in the PCV system were compared with those of commercial electrochemical workstations. The difference was less than 4.99%, with a relative standard deviation less than 0.20%. An electrochemical biosensor based on a Prussian blue-multiwalled carbon nanotube-gold nanoparticle composite was developed for E. coli detection. After constructing an antibody-BSA-E. coli electrode modification on the sensor, experimental data processed by the DPPA algorithm showed that the logarithm (lg DfE.coli) of the E. coli dilution factor and the peak current response had a linear relationship. The PCV system could quickly and accurately detect E. coli concentrations with dynamic adjustment algorithms for biofilm-modified electrodes. Furthermore, the system could detect the electrochemical activities of various high-sensitivity biomolecules, showing great detection potential for on-site monitoring and meeting the requirements of real-time and portable detection in various food safety fields.
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Affiliation(s)
- Ying Xu
- College of Automation, Hangzhou Dianzi University, Xiasha Higher Education Zone, Hangzhou 310018, Zhejiang Province, China
| | - Yan Dai
- College of Automation, Hangzhou Dianzi University, Xiasha Higher Education Zone, Hangzhou 310018, Zhejiang Province, China
| | - Chao Li
- College of Automation, Hangzhou Dianzi University, Xiasha Higher Education Zone, Hangzhou 310018, Zhejiang Province, China
| | - Haijing Zhang
- College of Automation, Hangzhou Dianzi University, Xiasha Higher Education Zone, Hangzhou 310018, Zhejiang Province, China
| | - Miao Guo
- College of Automation, Hangzhou Dianzi University, Xiasha Higher Education Zone, Hangzhou 310018, Zhejiang Province, China
| | - Yong Yang
- College of Automation, Hangzhou Dianzi University, Xiasha Higher Education Zone, Hangzhou 310018, Zhejiang Province, China
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22
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Wang W, Bao N, Yuan W, Si N, Bai H, Li H, Zhang Q. Simultaneous determination of lead, arsenic, and mercury in cosmetics using a plastic based disposable electrochemical sensor. Microchem J 2019. [DOI: 10.1016/j.microc.2019.05.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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23
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Manikandan VS, Adhikari B, Chen A. Nanomaterial based electrochemical sensors for the safety and quality control of food and beverages. Analyst 2019; 143:4537-4554. [PMID: 30113611 DOI: 10.1039/c8an00497h] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The issue of foodborne related illnesses due to additives and contaminants poses a significant challenge to food processing industries. The efficient, economical and rapid analysis of food additives and contaminants is therefore necessary in order to minimize the risk of public health issues. Electrochemistry offers facile and robust analytical methods, which are desirable for food safety and quality assessment over conventional analytical techniques. The development of a wide array of nanomaterials has paved the way for their applicability in the design of high-performance electrochemical sensing devices for medical diagnostics and environment and food safety. The design of nanomaterial based electrochemical sensors has garnered enormous attention due to their high sensitivity and selectivity, real-time monitoring and ease of use. This review article focuses predominantly on the synthesis and applications of different nanomaterials for the electrochemical determination of some common additives and contaminants, including hydrazine (N2H4), malachite green (MG), bisphenol A (BPA), ascorbic acid (AA), caffeine, caffeic acid (CA), sulfite (SO32-) and nitrite (NO2-), which are widely found in food and beverages. Important aspects, such as the design, fabrication and characterization of graphene-based materials, gold nanoparticles, mono- and bimetallic nanoparticles and metal nanocomposites, sensitivity and selectivity for electrochemical sensor development are addressed. High-performance nanomaterial based electrochemical sensors have and will continue to have myriad prospects in the research and development of advanced analytical devices for the safety and quality control of food and beverages.
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Affiliation(s)
- Venkatesh S Manikandan
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Road E, Guelph, Ontario N1G 2W1, Canada.
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24
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Dianat S, Hatefi-Mehrjardi A, Mahmoodzadeh K, Kakhki S. Electrocatalytic determination of Cd2+ and Pb2+ using an l-cysteine tungstophosphate self-assembled monolayer on a polycrystalline gold electrode. NEW J CHEM 2019. [DOI: 10.1039/c9nj03459e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Constructing a sensitive electrochemical sensor based on (Cys)PW for Cd2+ and Pb2+ detection at the nanomolar level with remarkable selectivity.
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Affiliation(s)
- Somayeh Dianat
- Department of Chemistry
- Faculty of Sciences
- University of Hormozgan
- Bandar Abbas 71961
- Iran
| | - Abdolhamid Hatefi-Mehrjardi
- Department of Chemistry
- Payame Noor University (PNU)
- Tehran
- Iran
- Department of Chemistry & Nanoscience and Nanotechnology Research Laboratory (NNRL)
| | - Kourosh Mahmoodzadeh
- Department of Chemistry
- Payame Noor University (PNU)
- Tehran
- Iran
- Department of Chemistry & Nanoscience and Nanotechnology Research Laboratory (NNRL)
| | - Somayeh Kakhki
- Department of Public Health
- Torbat Heydariyeh University of Medical Sciences
- Torbat Heydariyeh
- Iran
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25
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Núñez C, Arancibia V, Triviño JJ. A new strategy for the modification of a carbon paste electrode with carrageenan hydrogel for a sensitive and selective determination of arsenic in natural waters. Talanta 2018; 187:259-264. [PMID: 29853044 DOI: 10.1016/j.talanta.2018.05.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 05/06/2018] [Accepted: 05/07/2018] [Indexed: 11/16/2022]
Abstract
An adsorptive stripping voltammetric method for the determination of As(III) and Astotal in water samples using a carrageenan modified carbon paste electrode is presented for the first time (CAR-CPE). The modified electrode was prepared in different ways: by adding CAR in solid form or as a hydrogel together with graphite and paraffin, as well as adsorbing CAR by applying a potential on an unmodified carbon paste electrode. The best results were obtained when CAR was incorporated as hydrogel (HCAR-CPE). The selection of the ratio amounts for electrode preparation was carried out applying a multivariate experimental design. Variables like amount of graphite (U1), HCAR (U2) and paraffin (U3) were optimized using a (2K+2K+C) model. The results showed that the amount of HCAR was the most significant factor, and the adequate U1:U2:U3 ratio to prepare the electrode was: 493 mg of graphite, 214 μL of paraffin and 134 μL of carrageenan as gel. The optimum parameters for the determination of As(III) were pH = 3.25 (0.01 mol L-1 H3PO4/H2PO4- solution); Eacc = -0.50 V and tacc = 30 s. The electrode presents good linear behavior concentration range from 0.50 to 6.70 μg L-1, with a limit of detection of 0.22 μg L-1. The relative standard deviation was 5.0% at the 1.5 μg L-1 As(III) level (n = 16). The method was validated by quantifying As(III) in spiked tap water from laboratory (RE: 3.0%), and it was applied for the determination of Astotal in water samples from the Loa River (North of Chile) prior reduction of As(V) with Na2S2O3 solution, obtaining 814.00 ± 0.03 μg L-1. The results of the proposed method were compared with those obtained by adsorptive stripping voltammetry with HMDE and by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) techniques.
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Affiliation(s)
- Claudia Núñez
- Pontificia Universidad Católica de Chile, Chemistry Faculty, Vicuña Mackenna 4860, Santiago 7820436, Chile.
| | - Verónica Arancibia
- Pontificia Universidad Católica de Chile, Chemistry Faculty, Vicuña Mackenna 4860, Santiago 7820436, Chile.
| | - Juan José Triviño
- Pontificia Universidad Católica de Chile, Biological Sciences Faculty, Avda, Libertador Bernardo OHiggins 340, Santiago 8331150, Chile.
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26
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Dang VH, Yen PTH, Giao NQ, Phong PH, Ha VTT, Duy PK, Hoeil C. A Versatile Carbon Fiber Cloth-supported Au Nanodendrite Sensor for Simultaneous Determination of Cu(II), Pb(II) and Hg(II). ELECTROANAL 2018. [DOI: 10.1002/elan.201800332] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Vu Hai Dang
- Institute of Chemistry; Vietnam Academy of Science and Technology; 18 Hoang Quoc Viet Cau Giay, Hanoi Vietnam
| | - Pham Thi Hai Yen
- Institute of Chemistry; Vietnam Academy of Science and Technology; 18 Hoang Quoc Viet Cau Giay, Hanoi Vietnam
| | - Nguyen Quynh Giao
- Institute of Chemistry; Vietnam Academy of Science and Technology; 18 Hoang Quoc Viet Cau Giay, Hanoi Vietnam
| | - Pham Hong Phong
- Institute of Chemistry; Vietnam Academy of Science and Technology; 18 Hoang Quoc Viet Cau Giay, Hanoi Vietnam
| | - Vu Thi Thu Ha
- Institute of Chemistry; Vietnam Academy of Science and Technology; 18 Hoang Quoc Viet Cau Giay, Hanoi Vietnam
- University of Science and Technology of Hanoi; Vietnam Academy of Science and Technology; 18 Hoang Quoc Viet Cau Giay, Hanoi Vietnam
| | - Pham Khac Duy
- Department of Chemistry and Institute for Materials Design; College of Natural Sciences, Hanyang University; Seoul 04763 Korea
| | - Chung Hoeil
- Department of Chemistry and Institute for Materials Design; College of Natural Sciences, Hanyang University; Seoul 04763 Korea
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27
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Manikandan VS, Liu Z, Chen A. Simultaneous detection of hydrazine, sulfite, and nitrite based on a nanoporous gold microelectrode. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.02.004] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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28
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Petovar B, Xhanari K, Finšgar M. A detailed electrochemical impedance spectroscopy study of a bismuth-film glassy carbon electrode for trace metal analysis. Anal Chim Acta 2018; 1004:10-21. [DOI: 10.1016/j.aca.2017.12.020] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 12/05/2017] [Indexed: 01/16/2023]
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29
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Molinero-Abad B, Izquierdo D, Pérez L, Escudero I, Arcos-Martínez MJ. Comparison of backing materials of screen printed electrochemical sensors for direct determination of the sub-nanomolar concentration of lead in seawater. Talanta 2018; 182:549-557. [PMID: 29501191 DOI: 10.1016/j.talanta.2018.02.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 01/30/2018] [Accepted: 02/02/2018] [Indexed: 11/18/2022]
Abstract
An anodic stripping voltammetric method is reported in this study for the determination of sub-nanomolar Pb concentration using disposable sensors, each consisting of three (counter, working and reference) screen-printed electrodes. Sensor performance was optimized for the determination of Pb through several surface modifications, by using single-walled carbon nanotubes, electro-reduced graphene oxide and gold nanoparticles. A scanning electron microscopy study of the deposition of electrogenerated gold nanoparticles of various sizes on the working electrode surface showed that spherical nanoparticles of around 100 nm provided the best results. The modification of working electrodes with graphene and gold nanoparticles permitted the determination of Pb2+ in seawater (Detection Limit: 3.21·10-10 M) without modifying the pH of the sample. The electrode systems were printed on both rigid and textile backing materials, to observe the influence of those materials on the final performance of the sensor.
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Affiliation(s)
- B Molinero-Abad
- Department of Chemistry, Faculty of Science, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - D Izquierdo
- Department of Chemistry, Faculty of Science, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain.
| | - L Pérez
- Department of Chemistry, Faculty of Science, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain; Department of Biotechnology, Faculty of Science, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - I Escudero
- Department of Biotechnology, Faculty of Science, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - M J Arcos-Martínez
- Department of Chemistry, Faculty of Science, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
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30
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A review of the identification and detection of heavy metal ions in the environment by voltammetry. Talanta 2018; 178:324-338. [DOI: 10.1016/j.talanta.2017.08.033] [Citation(s) in RCA: 268] [Impact Index Per Article: 44.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 07/31/2017] [Accepted: 08/09/2017] [Indexed: 12/24/2022]
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31
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A Comprehensive Review on Various Analytical Methods for the Determination of Inorganic and Organic Arsenic in Environmental Samples. ACTA ACUST UNITED AC 2017. [DOI: 10.1007/978-981-10-7332-8_2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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32
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A real-time-range potentiostat coupled to nano-Au-modified microband electrode array for high-speed stripping determination of human blood lead. Biosens Bioelectron 2017; 97:267-272. [DOI: 10.1016/j.bios.2017.06.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 05/25/2017] [Accepted: 06/05/2017] [Indexed: 02/07/2023]
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33
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Nejdl L, Kynicky J, Brtnicky M, Vaculovicova M, Adam V. Amalgam Electrode-Based Electrochemical Detector for On-Site Direct Determination of Cadmium(II) and Lead(II) from Soils. SENSORS 2017; 17:s17081835. [PMID: 28792458 PMCID: PMC5579481 DOI: 10.3390/s17081835] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 08/02/2017] [Accepted: 08/04/2017] [Indexed: 11/16/2022]
Abstract
Toxic metal contamination of the environment is a global issue. In this paper, we present a low-cost and rapid production of amalgam electrodes used for determination of Cd(II) and Pb(II) in environmental samples (soils and wastewaters) by on-site analysis using difference pulse voltammetry. Changes in the electrochemical signals were recorded with a miniaturized potentiostat (width: 80 mm, depth: 54 mm, height: 23 mm) and a portable computer. The limit of detection (LOD) was calculated for the geometric surface of the working electrode 15 mm² that can be varied as required for analysis. The LODs were 80 ng·mL-1 for Cd(II) and 50 ng·mL-1 for Pb(II), relative standard deviation, RSD ≤ 8% (n = 3). The area of interest (Dolni Rozinka, Czech Republic) was selected because there is a deposit of uranium ore and extreme anthropogenic activity. Environmental samples were taken directly on-site and immediately analysed. Duration of a single analysis was approximately two minutes. The average concentrations of Cd(II) and Pb(II) in this area were below the global average. The obtained values were verified (correlated) by standard electrochemical methods based on hanging drop electrodes and were in good agreement. The advantages of this method are its cost and time effectivity (approximately two minutes per one sample) with direct analysis of turbid samples (soil leach) in a 2 M HNO₃ environment. This type of sample cannot be analyzed using the classical analytical methods without pretreatment.
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Affiliation(s)
- Lukas Nejdl
- Central European Institute of Technology, Brno University of Technology, Purkynova 123, 612 00 Brno, Czech Republic.
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic.
- Department of Microelectronics, Faculty of Electrical Engineering and Communication, Brno University of Technology, Technicka 10, 616 00 Brno, Czech Republic.
| | - Jindrich Kynicky
- Central European Institute of Technology, Brno University of Technology, Purkynova 123, 612 00 Brno, Czech Republic.
- Department of Geology and Paedology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic.
| | - Martin Brtnicky
- Central European Institute of Technology, Brno University of Technology, Purkynova 123, 612 00 Brno, Czech Republic.
- Department of Geology and Paedology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic.
| | - Marketa Vaculovicova
- Central European Institute of Technology, Brno University of Technology, Purkynova 123, 612 00 Brno, Czech Republic.
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic.
| | - Vojtech Adam
- Central European Institute of Technology, Brno University of Technology, Purkynova 123, 612 00 Brno, Czech Republic.
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic.
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Jaramillo DXO, Sukeri A, Saravia LP, Espinoza-Montero PJ, Bertotti M. Nanoporous Gold Microelectrode: A Novel Sensing Platform for Highly Sensitive and Selective Determination of Arsenic (III) using Anodic Stripping Voltammetry. ELECTROANAL 2017. [DOI: 10.1002/elan.201700301] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Darío Xavier Orellana Jaramillo
- Department of Fundamental Chemistry, Institute of Chemistry; University of São Paulo, Av Prof. Lineu Prestes, 748; São Paulo, SP Brazil
- Centro de Investigación y Control Ambiental, Departamento de Ingeniería Civil y Ambiental; Escuela Politécnica Nacional, Ladrón de Guevara E11-253, P.O.Box 17-01-2759; Quito-Ecuador
| | - Anandhakumar Sukeri
- Department of Fundamental Chemistry, Institute of Chemistry; University of São Paulo, Av Prof. Lineu Prestes, 748; São Paulo, SP Brazil
| | - Lucas P.H. Saravia
- Department of Fundamental Chemistry, Institute of Chemistry; University of São Paulo, Av Prof. Lineu Prestes, 748; São Paulo, SP Brazil
| | - Patricio Javier Espinoza-Montero
- Centro de Investigación y Control Ambiental, Departamento de Ingeniería Civil y Ambiental; Escuela Politécnica Nacional, Ladrón de Guevara E11-253, P.O.Box 17-01-2759; Quito-Ecuador
| | - Mauro Bertotti
- Department of Fundamental Chemistry, Institute of Chemistry; University of São Paulo, Av Prof. Lineu Prestes, 748; São Paulo, SP Brazil
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Multi-element determination of metals and metalloids in waters and wastewaters, at trace concentration level, using electroanalytical stripping methods with environmentally friendly mercury free-electrodes: A review. Talanta 2017; 175:53-68. [PMID: 28842029 DOI: 10.1016/j.talanta.2017.06.077] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2017] [Revised: 06/27/2017] [Accepted: 06/30/2017] [Indexed: 01/28/2023]
Abstract
Nowadays, water is no longer regarded as an inexhaustible resource and the excessive release and proliferation of toxic metal(loid)s into aquatic environments has become a critical issue. Therefore, fast, accurate, simple, selective, sensitive and portable methodologies to detect multiple elements in natural waters is of paramount importance. Electrochemical stripping analysis is an efficient tool for trace metal(loid)s determinations and bring new prospects for answering the current environmental concerns. This review presents a survey of the advancements made between 2003 and 2016 on the development and application of non-toxic mercury free electrodes on the simultaneous analysis of metals and metalloids in waters and wastewaters by means of electroanalytical stripping techniques. The advantages, limitations, improvements and real applications of these "green" sensors are discussed from a critical point of view.
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Yu XL, He Y. Application of Box-Behnken designs in parameters optimization of differential pulse anodic stripping voltammetry for lead(II) determination in two electrolytes. Sci Rep 2017; 7:2789. [PMID: 28584267 PMCID: PMC5459856 DOI: 10.1038/s41598-017-03030-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 04/21/2017] [Indexed: 11/20/2022] Open
Abstract
Box-Behnken design was advantageous to parameters optimization of differential pulse anodic stripping voltammetry (DPASV) for the analysis of lead(II) with its high efficiency and accuracy. Five Box-Behnken designs were designed and conducted in the electrolyte of 0.1 mol/L acetate buffer and 0.1 mol/L HCl without the removal of oxygen. Significant parameters and interactions in each electrolyte were found (P-value < 0.05) and their quantitative effects on lead(II) determination were classified into two categories, linear and quadratic. Though significant parameters and interactions were not similar in different kinds of electrolytes, characteristic parameters of differential pulse voltammetry, which were pulse amplitude, pulse width and interval time, were found significant in both electrolytes. After optimization, peak currents and relative standard deviation at 20 μg/L along with detection limits in both electrolytes were superior than before. With the lower detection limit and R.S.D., 0.1 mol/L HCl was a better choice for electrolytes in this work. Meanwhile, with the combination of parameters optimization and background subtraction, the interference of dissolved oxygen for lead(II) determination was eliminated. It was important and necessary to apply Box-Behnken designs in parameters optimization of DPASV for lead(II) determination regardless of the electrolyte kinds.
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Affiliation(s)
- Xiao-Lan Yu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, P.R. China
| | - Yong He
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, P.R. China.
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Bulska E, Ruszczyńska A. Analytical Techniques for Trace Element Determination. PHYSICAL SCIENCES REVIEWS 2017. [DOI: 10.1515/psr-2017-8002] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Silva LAJ, da Silva WP, Giuliani JG, Canobre SC, Garcia CD, Munoz RAA, Richter EM. Use of pyrolyzed paper as disposable substrates for voltammetric determination of trace metals. Talanta 2017; 165:33-38. [DOI: 10.1016/j.talanta.2016.12.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Revised: 11/30/2016] [Accepted: 12/03/2016] [Indexed: 01/03/2023]
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Zhou C, Yang M, Li SS, Jiang TJ, Liu JH, Huang XJ, Chen X. Electrochemically etched gold wire microelectrode for the determination of inorganic arsenic. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.01.184] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Huang J, Bai S, Yue G, Cheng W, Wang L. Coordination matrix/signal amplifier strategy for simultaneous electrochemical determination of cadmium(ii), lead(ii), copper(ii), and mercury(ii) ions based on polyfurfural film/multi-walled carbon nanotube modified electrode. RSC Adv 2017. [DOI: 10.1039/c7ra04029f] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Coordination matrix/signal amplifier strategy for simultaneous electrochemical determination of cadmium(ii), lead(ii), copper(ii) and mercury(ii) ions based on polyfurfural film/multi-walled carbon nanotubes modified electrode.
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Affiliation(s)
- Jianzhi Huang
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
| | - Silan Bai
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
| | - Guoqing Yue
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
| | - Wenxue Cheng
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
| | - Lishi Wang
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
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Oliveira Silva AC, de Oliveira LCF, Vieira Delfino A, Meneghetti MR, Caxico de Abreu F. Electrochemical Study of Carbon Nanotubes/Nanohybrids for Determination of Metal Species Cu 2+ and Pb 2+ in Water Samples. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2016; 2016:9802738. [PMID: 27882263 PMCID: PMC5108864 DOI: 10.1155/2016/9802738] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Accepted: 10/10/2016] [Indexed: 06/06/2023]
Abstract
The use of nanomaterials, such as nanoparticles and nanotubes, for electrochemical detection of metal species has been investigated as a way of modifying electrodes by electrochemical stripping analysis. The present study develops a new methodology based on a comparative study of nanoparticles and nanotubes with differential pulse anodic stripping voltammetry (DPASV) and examines the simultaneous determination of copper and lead. The glassy carbon electrode modified by gold nanoparticles demonstrated increased sensitivity and decreased detection limits, among other improvements in analytical performance data. Under optimized conditions (deposition potential -0.8 V versus Ag/AgCl; deposition time, 300 s; resting time, 10 s; pulse amplitude, 50 mV; and voltage step height, 4 mV), the detection limits were 0.2279 and 0.3321 ppb, respectively, for determination of Pb2+ and Cu2+. The effects of cations and anions on the simultaneous determination of metal ions do not exhibit significant interference, thereby demonstrating the selectivity of the electrode for simultaneous determination of Pb2+ and Cu2+. The same method was also used to determine Cu2+ in water samples.
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Affiliation(s)
| | | | - Angladis Vieira Delfino
- Instituto de Química e Biotecnologia, Universidade Federal de Alagoas (UFAL), 57072-970 Maceió, AL, Brazil
| | - Mario Roberto Meneghetti
- Instituto de Química e Biotecnologia, Universidade Federal de Alagoas (UFAL), 57072-970 Maceió, AL, Brazil
| | - Fabiane Caxico de Abreu
- Instituto de Química e Biotecnologia, Universidade Federal de Alagoas (UFAL), 57072-970 Maceió, AL, Brazil
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42
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Buffa A, Erel Y, Mandler D. Carbon Nanotube Based Flow-Through Electrochemical Cell for Electroanalysis. Anal Chem 2016; 88:11007-11015. [DOI: 10.1021/acs.analchem.6b02827] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andrea Buffa
- Institute of Chemistry and ‡Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Yigal Erel
- Institute of Chemistry and ‡Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Daniel Mandler
- Institute of Chemistry and ‡Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
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43
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Antonova S, Zakharova E. Inorganic arsenic speciation by electroanalysis. From laboratory to field conditions: A mini-review. Electrochem commun 2016. [DOI: 10.1016/j.elecom.2016.06.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
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44
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Matlou GG, Nkosi D, Pillay K, Arotiba O. Electrochemical detection of Hg(II) in water using self-assembled single walled carbon nanotube-poly( m -amino benzene sulfonic acid) on gold electrode. SENSING AND BIO-SENSING RESEARCH 2016. [DOI: 10.1016/j.sbsr.2016.08.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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45
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Electromembrane extraction and anodic stripping voltammetric determination of mercury(II) using a glassy carbon electrode modified with gold nanoparticles. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-1884-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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46
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Electrochemical co-detection of As(III), Hg(II) and Pb(II) on a bismuth modified exfoliated graphite electrode. Talanta 2016; 153:99-106. [DOI: 10.1016/j.talanta.2016.03.003] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 02/29/2016] [Accepted: 03/01/2016] [Indexed: 11/22/2022]
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47
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Effect of natural phosphate to remove silver interference in the detection of mercury(II) in aquatic algae and seawater samples. SENSING AND BIO-SENSING RESEARCH 2016. [DOI: 10.1016/j.sbsr.2016.01.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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48
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Han DD, Li SS, Guo Z, Chen X, Liu JH, Huang XJ. Shape dependent stripping behavior of Au nanoparticles toward arsenic detection: evidence of enhanced sensitivity on the Au (111) facet. RSC Adv 2016. [DOI: 10.1039/c5ra27778g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
This work reports a comparative study of gold cubes {100}, octahedra {111}, and rhombic dodecahedra {110} toward the detection of arsenic for the first time. Au octahedral nanoparticles were found to exhibit the highest sensitivity.
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Affiliation(s)
- Dong-Dong Han
- Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
- PR China
- Nano-Materials and Environmental Detection Laboratory
| | - Shan-Shan Li
- Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
- PR China
- Nano-Materials and Environmental Detection Laboratory
| | - Zheng Guo
- Nano-Materials and Environmental Detection Laboratory
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei 230031
- People's Republic of China
| | - Xing Chen
- Nano-Materials and Environmental Detection Laboratory
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei 230031
- People's Republic of China
| | - Jin-Huai Liu
- Nano-Materials and Environmental Detection Laboratory
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei 230031
- People's Republic of China
| | - Xing-Jiu Huang
- Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
- PR China
- Nano-Materials and Environmental Detection Laboratory
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Rueda-Holgado F, Calvo-Blázquez L, Cereceda-Balic F, Pinilla-Gil E. A semiautomatic system for soluble lead and copper monitoring in atmospheric deposition by coupling of passive elemental fractionation sampling and voltammetric measurement on screen-printed gold electrodes. Microchem J 2016. [DOI: 10.1016/j.microc.2015.07.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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50
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