1
|
Yang Y, Chen S, Zhang C, Li Y, Zong X, Lv Y, Zhang M. Subtle adjustment of the cyclic potential on electro-activated glassy carbon electrodes for sensitive sensing of methyl parathion. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:2522-2532. [PMID: 38587853 DOI: 10.1039/d4ay00079j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
Facile electro-activated glassy carbon electrodes (e-GCEs), which are prepared in electrolyte solution with a certain potential for a few seconds, have been verified to improve analytical performance toward not a few electro-active molecules recently. Nevertheless, how and why the potential plays an important role is not clear, and has even not received enough consideration. In this paper, we found that the mode and the range of applied potential significantly impacted the sensitivity of methyl parathion (MP), which is a typical pesticide with the electro-active group of -NO2. Compared with constant potential, the e-GCE with cyclic potential provided a much more stable baseline during MP detection. Additionally, the electro-oxidation peak current of MP at around -0.1 V on it was higher than another changeable potential (constant current). What's more interesting, with cyclic potential for 50 segments from -2 to 1.5 V, the peak current value increased by 30 times in comparison with a bare GCE, but only 2 times from -2 to 1 V. Then after systematic investigation including structures of the electrode surface and functional groups, we speculated that the produced group of O-CO in the process of activation and remaining groups of C-O and CO on the bare GCE surface are beneficial for adsorbing MP molecules leading to enhanced peak current. Employing the proposed e-GCE, the limit of detection of MP reached 0.015 μM and the reproducibility was perfect. This work elucidates the potent impact of electro-activation potential parameters on electroanalysis behaviors.
Collapse
Affiliation(s)
- Yunyin Yang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Sian Chen
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Changqiu Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Yanqing Li
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Xinrong Zong
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Yitao Lv
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Min Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
| |
Collapse
|
2
|
Khlyupin A, Nesterova I, Gerke K. Molecular scale roughness effects on electric double layer structure in asymmetric ionic liquids. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.142261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
|
3
|
Lu D, Wang X, Feng C, Liu D, Liu Y, Liu Y, Li J, Zhang J, Li N, Deng Y, Wang K, Ren R, Pang G. Study of the Sensing Kinetics of G Protein-Coupled Estrogen Receptor Sensors for Common Estrogens and Estrogen Analogs. Molecules 2023; 28:molecules28083286. [PMID: 37110520 PMCID: PMC10143753 DOI: 10.3390/molecules28083286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 04/04/2023] [Accepted: 04/04/2023] [Indexed: 04/29/2023] Open
Abstract
Endogenous and exogenous estrogens are widely present in food and food packaging, and high levels of natural estrogens and the misuse or illegal use of synthetic estrogens can lead to endocrine disorders and even cancer in humans. Therefore, it is consequently important to accurately evaluate the presence of food-functional ingredients or toxins with estrogen-like effects. In this study, an electrochemical sensor based on G protein-coupled estrogen receptors (GPERs) was fabricated by self-assembly, modified by double-layered gold nanoparticles, and used to measure the sensing kinetics for five GPER ligands. The interconnected allosteric constants (Ka) of the sensor for 17β-estradiol, resveratrol, G-1, G-15, and bisphenol A were 8.90 × 10-17, 8.35 × 10-16, 8.00 × 10-15, 5.01 × 10-15, and 6.65 × 10-16 mol/L, respectively. The sensitivity of the sensor for the five ligands followed the order of 17β-estradiol > bisphenol A > resveratrol > G-15 > G-1. The receptor sensor also demonstrated higher sensor sensitivity for natural estrogens than exogenous estrogens. The results of molecular simulation docking showed that the residues Arg, Glu, His, and Asn of GPER mainly formed hydrogen bonds with -OH, C-O-C, or -NH-. In this study, simulating the intracellular receptor signaling cascade with an electrochemical signal amplification system enabled us to directly measure GPER-ligand interactions and explore the kinetics after the self-assembly of GPERs on a biosensor. This study also provides a novel platform for the accurate functional evaluation of food-functional components and toxins.
Collapse
Affiliation(s)
- Dingqiang Lu
- College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China
- Tianjin Key Laboratory of Food Biotechnology, Tianjin 300134, China
| | - Xinqian Wang
- College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Chunlei Feng
- College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Danyang Liu
- College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Yixuan Liu
- College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Yujiao Liu
- College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Jie Li
- College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Jiayao Zhang
- College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Na Li
- College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Yujing Deng
- College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Ke Wang
- College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Ruijuan Ren
- Tianjin Institute for Food Safety Inspection Technology, Tianjin 300134, China
| | - Guangchang Pang
- College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China
- Tianjin Key Laboratory of Food Biotechnology, Tianjin 300134, China
| |
Collapse
|
4
|
Lv Y, Zhang Y, Yang Y, Li J, Wang J, Xiao X, Zhang M. Strategy of In Situ Electrochemical Regulation for Highly Enhanced Nonenzymatic Sensing of Carbaryl. Anal Chem 2023; 95:4015-4023. [PMID: 36802553 DOI: 10.1021/acs.analchem.2c04373] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Specific and sensitive sensing of most pesticide residues relies on enzymes such as acetylcholinesterase and advanced materials, which need to be loaded on the surface of working electrodes, leading to instability, uneven surface, tedious process, and high cost. Meanwhile, employing certain potential or current in electrolyte solution could also modify the surface in situ and overcome these drawbacks. However, this method is only regarded as electrochemical activation widely applied in the pretreatment of electrodes. In this paper, by means of regulating the electrochemical technique and its parameters, we prepared a proper sensing interface and derivatized the carbaryl (a carbamate pesticide) hydrolyzed form (1-naphthol) to enhance sensing by 100 times within several minutes. After regulation I by chronopotentiometry with 0.2 mA for 20 s or chronoamperometry with 2 V for 10 s, abundant oxygen-containing groups form and the ordered carbon structure is destroyed. Sweeping from -0.5 to 0.9 V through cyclic voltammetry for only one segment, following regulation II, the composition of oxygen-containing groups changes and the disordered structure is alleviated. Finally, on the constructed sensing interface, test by regulation III through differential pulse voltammetry from 0.8 to -0.4 V, resulting in derivatization of 1-naphthol during 0.8-0 V, followed by electroreduction of the derivative at around -0.17 V. Compared with the electro-oxidation peak at 0.5 V in previous reports, it is essential to improve specificity, even toward several other carbamate pesticides with similar structures. Hence, the in situ electrochemical regulation strategy has demonstrated great potential for effective sensing of electroactive molecules.
Collapse
Affiliation(s)
- Yitao Lv
- College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100, China
| | - Yi Zhang
- College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100, China
| | - Yunyin Yang
- College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100, China
| | - Jingyan Li
- College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100, China
| | - Jiacheng Wang
- Medical College, Yangzhou University, No. 11 Huaihai Road, Yangzhou, Jiangsu 225009, China
| | - Xilin Xiao
- Department of Public Health Laboratory Sciences, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
| | - Min Zhang
- College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100, China
| |
Collapse
|
5
|
Huang J, Zhang T, Dong G, Zhu S, Yan F, Liu J. Direct and Sensitive Electrochemical Detection of Bisphenol A in Complex Environmental Samples Using a Simple and Convenient Nanochannel-Modified Electrode. Front Chem 2022; 10:900282. [PMID: 35720995 PMCID: PMC9204582 DOI: 10.3389/fchem.2022.900282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Accepted: 04/19/2022] [Indexed: 11/13/2022] Open
Abstract
Rapid, convenient, and sensitive detection of Bisphenol A (BPA) in complex environmental samples without the need for tedious pre-treatment is crucial for assessing potential health risks. Herein, we present an electrochemical sensing platform using a simple nanochannel-modified electrode, which enables the direct and sensitive detection of BPA in complex samples. A vertically ordered mesoporous silica-nanochannel film (VMSF) with high-density nanochannels is rapidly and stably grown on the surface of a electrochemically activated glassy carbon electrode (p-GCE) by using the electrochemically assisted self-assembly (EASA) method. The high antifouling capability of the VMSF/p-GCE sensor is proven by investigating the electrochemical behavior of BPA in the presence of model coexisting interfering molecules including amylum, protein, surfactant, and humic acid. The VMSF/p-GCE sensor can sensitively detect BPA ranged from 50 to 1.0 μM and 1.0–10.0 μM, with low detection limits (15 nM). Owing to the electrocatalytic performance and high potential resolution of p-GCE, the sensor exhibits high selectivity for BPA detection in the presence of common environmental pollutants, including bisphenol S (BPS), catechol (CC), hydroquinone (HQ), and 4-nitrophenol (4-NP). In combination with the good antifouling property of the VMSF, direct detection of BPA in environmental water samples and soil leaching solution (SLS) is also realized without separation pretreatment. The developed VMSF/p-GCE sensor demonstrated advantages of simple structure, high sensitivity, good antifouling performance, and great potential in direct electroanalysis of endocrine-disrupting compounds in complex samples.
Collapse
Affiliation(s)
- Jie Huang
- Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, China
- Heihe Water Resources and Ecological Protection Research Center, Lanzhou, China
| | - Tongtong Zhang
- Department of Hepatobiliary and Pancreatic Surgery, The Center for Integrated Oncology and Precision Medicine, Affiliated Hangzhou First People’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Guotao Dong
- Heihe Water Resources and Ecological Protection Research Center, Lanzhou, China
- *Correspondence: Guotao Dong, ; Jiyang Liu,
| | - Shanshan Zhu
- Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, China
| | - Fei Yan
- Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, China
| | - Jiyang Liu
- Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, China
- *Correspondence: Guotao Dong, ; Jiyang Liu,
| |
Collapse
|
6
|
Pei C, Lu D, Liu D, Pang G. Development of a nanozyme-based electrochemical sensor for detection of stringent response. Anal Chim Acta 2022; 1201:339602. [DOI: 10.1016/j.aca.2022.339602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 01/18/2022] [Accepted: 02/11/2022] [Indexed: 12/01/2022]
|
7
|
Recent Advances in Electrochemical Chitosan-Based Chemosensors and Biosensors: Applications in Food Safety. CHEMOSENSORS 2021. [DOI: 10.3390/chemosensors9090254] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Chitosan is a biopolymer derived from chitin. It is a non-toxic, biocompatible, bioactive, and biodegradable polymer. Due to its properties, chitosan has found applications in several and different fields such as agriculture, food industry, medicine, paper fabrication, textile industry, and water treatment. In addition to these properties, chitosan has a good film-forming ability which allows it to be widely used for the development of sensors and biosensors. This review is focused on the use of chitosan for the formulation of electrochemical chemosensors. It also aims to provide an overview of the advantages of using chitosan as an immobilization platform for biomolecules by highlighting its applications in electrochemical biosensors. Finally, applications of chitosan-based electrochemical chemosensors and biosensors in food safety are illustrated.
Collapse
|
8
|
Wang M, Lin J, Gong J, Ma M, Tang H, Liu J, Yan F. Rapid and sensitive determination of doxorubicin in human whole blood by vertically-ordered mesoporous silica film modified electrochemically pretreated glassy carbon electrodes. RSC Adv 2021; 11:9021-9028. [PMID: 35423372 PMCID: PMC8695326 DOI: 10.1039/d0ra10000e] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 02/08/2021] [Indexed: 12/15/2022] Open
Abstract
Direct and accurate detection of doxorubicin (DOX) in unprocessed human whole blood is of vital importance in medical diagnosis and monitoring. In this work, we demonstrate the utilization of electrochemically pretreated glassy carbon electrodes (p-GCE) modified with vertically-ordered mesoporous silica films (VMSF) for rapid and sensitive electrochemical detection of DOX. The electrochemically pretreated process is a simple, cost-effective and environmentally friendly approach for improving interface catalytic properties and introducing oxygen-containing groups into the GCE surface, which could be suitable for stably growing VMSF without any adhesive layer simultaneously retaining the underlying electrode activity. Benefiting from the highly sensitive electrode substrate of p-GCE and electrostatic preconcentration effect of VMSF, the present VMSF/p-GCE sensor was able to determine DOX with an ultrahigh sensitivity (23.94 μA μM-1) and a relatively low limit of detection (0.2 nM) and a rather wide linear range (0.5 nM to 23 μM). Furthermore, direct and reliable electrochemical detection of DOX in human whole blood without complicated sample pretreatments was achieved owing to the excellent anti-fouling and anti-interference ability of VMSF.
Collapse
Affiliation(s)
- Meifang Wang
- Department of Chemistry, Zhejiang Sci-Tech University 928 Second Avenue, Xiasha Higher Education Zone Hangzhou 310018 PR China
| | - Jing Lin
- The First Affiliated Hospital of Guangxi University of Chinese Medicine Nanning 530023 China
| | - Jiawei Gong
- Department of Chemistry, Zhejiang Sci-Tech University 928 Second Avenue, Xiasha Higher Education Zone Hangzhou 310018 PR China
| | - Mingchen Ma
- Guangxi University of Chinese Medicine Nanning 530020 China
| | - Hongliang Tang
- Affiliated Fangchenggang Hospital, Guangxi University of Chinese Medicine Fangchenggang 538001 China
| | - Jiyang Liu
- Department of Chemistry, Zhejiang Sci-Tech University 928 Second Avenue, Xiasha Higher Education Zone Hangzhou 310018 PR China
| | - Fei Yan
- Department of Chemistry, Zhejiang Sci-Tech University 928 Second Avenue, Xiasha Higher Education Zone Hangzhou 310018 PR China
| |
Collapse
|
9
|
Wang S, Lu D, Pang G. Construction of a Ginseng Root-Meristem Sensor and a Sensing Kinetics Study on the Main Nitrogen Nutrients. SENSORS (BASEL, SWITZERLAND) 2021; 21:681. [PMID: 33498310 PMCID: PMC7863967 DOI: 10.3390/s21030681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 01/16/2021] [Accepted: 01/18/2021] [Indexed: 11/16/2022]
Abstract
Severe continuous cropping obstacles exist in ginseng cultivation. In order to assess these obstacles, a "sandwich" ginseng root tissue sensor was developed for the kinetic determination of five nitrogen nutrients. The results showed that the sensing parameters of the sensor reached an ultrasensitive level (limit of detection up to 5.451 × 10-24 mol/L) for the five nitrogen nutrients, and exhibited good stability and reproducibility. In the order of two-, four-, and six-year-old ginseng plants, the sensitivity to inorganic nitrogen nutrients (sodium nitrate and urea) showed an upward trend following an initial decline (the interconnected allosteric constant Ka values acted as the parameter). The fluctuations in sensor sensitivity to organic nitrogen nutrients, specifically nucleotides (disodium inosinate and disodium guanylate), were relatively small. The sensor sensitivity of two-, four-, and six-year-old ginseng plants to sodium glutamate was 9.277 × 10-19 mol/L, 6.980 × 10-21 mol/L, and 5.451 × 10-24 mol/L, respectively. Based on the survival rate of the seedlings and mortality rate of the ginseng in each age group, a Hardy-Weinberg equilibrium analysis was carried out. The results showed that the sensing ability of the root system to sodium glutamate may be an important factor affecting its survival under continuous cropping obstacles with increasing age.
Collapse
Affiliation(s)
| | - Dingqiang Lu
- Tianjin Key Laboratory of Food Biotechnology, College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300314, China;
| | - Guangchang Pang
- Tianjin Key Laboratory of Food Biotechnology, College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300314, China;
| |
Collapse
|
10
|
Novel electrochemical sensor based on modified glassy carbon electrode with graphene quantum dots, chitosan and nickel molybdate nanocomposites for diazinon and optimal design by the Taguchi method. Microchem J 2021. [DOI: 10.1016/j.microc.2020.105628] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
11
|
Han D, Goudeau B, Jiang D, Fang D, Sojic N. Electrochemiluminescence Microscopy of Cells: Essential Role of Surface Regeneration. Anal Chem 2020; 93:1652-1657. [DOI: 10.1021/acs.analchem.0c05123] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Dongni Han
- Univ. Bordeaux, Bordeaux INP, CNRS, UMR 5255, Site ENSCBP, 33607 Pessac, France
- School of Pharmacy and Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, Jiangsu 211126, China
| | - Bertrand Goudeau
- Univ. Bordeaux, Bordeaux INP, CNRS, UMR 5255, Site ENSCBP, 33607 Pessac, France
| | - Dechen Jiang
- State Key Laboratory of Analytical Chemistry for Life and School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Danjun Fang
- School of Pharmacy and Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, Jiangsu 211126, China
| | - Neso Sojic
- Univ. Bordeaux, Bordeaux INP, CNRS, UMR 5255, Site ENSCBP, 33607 Pessac, France
- Department of Chemistry, South Ural State University, Chelyabinsk 454080, Russian Federation
| |
Collapse
|
12
|
Vukmirovic MB, Adzic RR, Akolkar R. Copper Electrodeposition from Deep Eutectic Solvents-Voltammetric Studies Providing Insights into the Role of Substrate: Platinum vs Glassy Carbon. J Phys Chem B 2020; 124:5465-5475. [PMID: 32497430 DOI: 10.1021/acs.jpcb.0c02735] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report on the effect of the substrate on electrochemical deposition of Cu from deep eutectic solvent ethaline. We investigated the polarization behavior during electrodeposition of Cu on Pt and glassy carbon (GC) from both Cu2+ and Cu+ containing ethaline using cyclic voltammetry (CV). Formation of bulk Cu deposits on both substrates underwent nucleation and growth processes; however, the nucleation was considerably sluggish on GC compared to Pt. While experiments in Cu+ solutions indicated that coalescence of Cu islands on Pt is a slow process and that its surface may not be fully covered by Cu, such determination of Cu coverage could not be made on GC. Cu dissolution is also slower from GC than from Pt. It was observed that CV of Cu deposition on GC is influenced by the surface preparation method. Since ethaline has high chloride concentration, a parallel study in aqueous 3 M NaCl solution was conducted in order to examine the influence of the chloride medium on the electrodeposition process. This revealed that electrodeposition in both media occurred in the same manner but with different charge and mass transfer rates caused by the differences in viscosity and chloride concentrations of the two solutions.
Collapse
Affiliation(s)
- Miomir B Vukmirovic
- Chemistry Division, Brookhaven National Laboratory, Upton New York 11973, United States
| | - Radoslav R Adzic
- Chemistry Division, Brookhaven National Laboratory, Upton New York 11973, United States
| | - Rohan Akolkar
- Department of Chemical and Biomolecular Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland Ohio 44106, United States
| |
Collapse
|
13
|
Farajmand B, Kamyabi MA, Sorkhani FY, Jam HS, Bahrami H. Combination of micro liquid-liquid extraction with differential pulse voltammetry for determination of TBHQ in edible oil samples by pre-anodized glassy carbon electrode. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.113966] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
14
|
Development of a new and simple method for the detection of histidine-tagged proteins based on thionine-chitosan/gold nanoparticles/horseradish peroxidase. Biomed Microdevices 2020; 22:11. [DOI: 10.1007/s10544-019-0464-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
15
|
Reversible potentiodynamic deposition of VO2/V2O5 network onto strongly oxidative glassy carbon electrode for quantification of tamoxifen drug. Microchem J 2020. [DOI: 10.1016/j.microc.2019.104327] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
16
|
LIU HY, ZHU LL, HUANG ZH, QIU YB, XU HX, WEN JJ, XIONG WW, LI LH, GU CC. Simultaneous Detection of Hydroquinone, Catechol and Resorcinol by an Electrochemical Sensor Based on Ammoniated-Phosphate Buffer Solution Activated Glassy Carbon Electrode. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2019. [DOI: 10.1016/s1872-2040(19)61183-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
17
|
Lu D, Xu Q, Pang G. A bombykol electrochemical receptor sensor and its kinetics. Bioelectrochemistry 2019; 128:263-273. [PMID: 31051432 DOI: 10.1016/j.bioelechem.2019.04.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 04/09/2019] [Accepted: 04/09/2019] [Indexed: 12/13/2022]
Abstract
This study aimed to explore the interaction between bombykol and BmOR1 and also provide a paradigm for agroforestry pest control. The electrochemical biosensor signal amplification system was used: nanogold with horseradish peroxidase. An electrochemical bilayer nanogold membrane receptor sensor was developed using the following schemes and processes: twice self-assembly of nanogold and succeeding absorption of Bombyx mori olfactory receptor 1 (BmOR1); sex pheromone-binding protein; spectral scanning and transmission electron microscope to characterize nanogold sol; and atomic force microscope, cyclic voltammetry, and AC impedance methods to characterize individual processes of sensor assembly. The amperometric I-T curve was adopted to measure the response current upon interaction with different concentrations of bombykol (diluted in phosphate-buffered saline) and BmOR1. The results demonstrated the receptor-ligand interaction pattern, which was similar to enzymatic reaction kinetics, with the activation constant Ka of up to 8.57 × 10-20 mol/L and signal magnification of about 10,000-fold. In this study, the simulation of intracellular receptor signaling cascade by an electrochemical signal amplification system helped in directly measuring BmOR1-bombykol ligand interaction and exploring the kinetics after the self-assembly of BmOR1 on the biosensor. It provided a novel platform for future studies on receptor-ligand interaction.
Collapse
Affiliation(s)
- Dingqiang Lu
- College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China; Tianjin Key Laboratory of Food Biotechnology, Tianjin 300134, China
| | - Qiuda Xu
- College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China; Tianjin Key Laboratory of Food Biotechnology, Tianjin 300134, China
| | - Guangchang Pang
- College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China.
| |
Collapse
|
18
|
EGFET-Based Sensors for Bioanalytical Applications: A Review. SENSORS 2018; 18:s18114042. [PMID: 30463318 PMCID: PMC6263563 DOI: 10.3390/s18114042] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 11/04/2018] [Accepted: 11/12/2018] [Indexed: 11/29/2022]
Abstract
Since the 1970s, a great deal of attention has been paid to the development of semiconductor-based biosensors because of the numerous advantages they offer, including high sensitivity, faster response time, miniaturization, and low-cost manufacturing for quick biospecific analysis with reusable features. Commercial biosensors have become highly desirable in the fields of medicine, food, and environmental monitoring as well as military applications, whereas increasing concerns about food safety and health issues have resulted in the introduction of novel legislative standards for these sensors. Numerous devices have been developed for monitoring biological processes such as nucleic acid hybridization, protein–protein interaction, antigen–antibody bonds, and substrate–enzyme reactions, just to name a few. Since the 1980s, scientific interest moved to the development of semiconductor-based devices, which also include integrated front-end electronics, such as the extended-gate field-effect transistor (EGFET) biosensor, one of the first miniaturized chemical sensors. This work is intended to be a review of the state of the art focused on the development of biosensors and chemosensors based on extended-gate field-effect transistor within the field of bioanalytical applications, which will highlight the most recent research reported in the literature. Moreover, a comparison among the diverse EGFET devices will be presented, giving particular attention to the materials and technologies.
Collapse
|
19
|
A novel electrochemical immunosensor based on Au nanoparticles and horseradish peroxidase signal amplification for ultrasensitive detection of α-fetoprotein. Biomed Microdevices 2018; 20:46. [PMID: 29869001 DOI: 10.1007/s10544-018-0291-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
An electrochemical double-layer Au nanoparticle membrane immunosensor was developed using an electrochemical biosensing signal amplification system with Au nanoparticles, thionine, chitosan, and horseradish peroxidase, which was fabricated using double self-adsorption of Au nanoparticle sol followed by anti-α-fetoprotein Balb/c mouse monoclonal antibody adsorption. The AuNPs sol was characterized by spectrum scanning and transmission electron microscopy. The immunosensor was characterized by atomic force microscopy, cyclic voltammetry, and alternating-current impedance during each stage of adsorption and assembly. The amperometric I-t curve method was used to measure α-fetoprotein (AFP) diluted in phosphate buffered saline. The result indicated a wide linear range, and the change rate of steady-current before and after immune response had linear correlation within the range 0.1-104 pg/mL AFP. The current change rate equation was △I = 5.82334 lgC + 37.01195 (R2 = 0.9922). The lowest limit of detection was 0.03 pg/mL (S/N = 3), and the reproducibility of the sensor was good. Additionally, the sensor could be stably stored above phosphate buffered saline at 4 °C for more than 24 days. More importantly, the sensor is label-free, reagentless and low fouling, making it capable of assaying AFP in real serum samples without suffering from significant interference or biofouling.
Collapse
|
20
|
Lu D, Pang G, Xie J. A new phosphothreonine lyase electrochemical immunosensor for detecting Salmonella based on horseradish peroxidase/GNPs-thionine/chitosan. Biomed Microdevices 2017; 19:12. [PMID: 28194610 DOI: 10.1007/s10544-017-0149-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
In the current study, a novel double-layer gold nanoparticles- electrochemical immunosensor electrode (DGN-EIE) immobilized with Salmonella plasmid virulence C (SpvC) antibody was developed. To increase the fixed quantity of antibodies and electrochemical signal, an electrochemical biosensing signal amplification system was utilized with gold nanoparticles-thionine-chitosan absorbing horseradish peroxidase (HRP). In addition, the SpvC monoclonal antibodies (derived from Balb/c mice) were prepared and screened with a high affinity to SpvC. To evaluate the quality of DGN-EIE, the amperometric I-t curve method was applied to determine Salmonella in PBS. The results showed that the response current had a good linear correlation with the bacterial quantity ranged from 1.0 × 101-5.0 × 104 cfu/mL. The lowest detection limit was found at 5 cfu/mL. Furthermore, the proposed immunosensor has been demonstrated with high sensitivity, good selectivity and reproducibility. Apparently, DGN-EIE may be a very useful tool for monitoring the bacteria.
Collapse
Affiliation(s)
- Dingqiang Lu
- Biotechnology & Food Science College, Tianjin University of Commerce, Tianjin, 300314, China
| | - Guangchang Pang
- Biotechnology & Food Science College, Tianjin University of Commerce, Tianjin, 300314, China. .,Tianjin Key Laboratory of Food Biotechnology, Tianjin, 300314, China.
| | - Junbo Xie
- Biotechnology & Food Science College, Tianjin University of Commerce, Tianjin, 300314, China. .,Tianjin Key Laboratory of Food Biotechnology, Tianjin, 300314, China.
| |
Collapse
|
21
|
Gao YX, Wu D, Yang YX, Wang WJ, Xie SY, Shiu KK, Shi K. Mechanistic study on the interfacial variation of carbon electrode under electrochemical oxidation. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.11.039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
22
|
A Novel Tetrahydrocannabinol Electrochemical Nano Immunosensor Based on Horseradish Peroxidase and Double-Layer Gold Nanoparticles. Molecules 2016; 21:molecules21101377. [PMID: 27763523 PMCID: PMC6274132 DOI: 10.3390/molecules21101377] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 10/09/2016] [Accepted: 10/12/2016] [Indexed: 11/17/2022] Open
Abstract
In the current study, a novel double-layer gold nanoparticles-electrochemical immunosensor electrode immobilized with tetrahydrocannabinol (THC) antibody derived from Balb/c mice was developed. To increase the fixed quantity of antibodies and electrochemical signals, an electrochemical biosensing signal amplification system was utilized with gold nanoparticles-thionine-chitosan absorbing horseradish peroxidase (HRP). In addition, a transmission electron microscope (TEM) was used to characterize the nanogold solution. To evaluate the quality of the immunosensor, the amperometric I-t curve method was applied to determine the THC in PBS. The results showed that the response current had a good linear correlation with the THC concentration range from 0.01~103 ng/mL with a correlation coefficient of 0.9986. The lowest detection limit for THC was 3.3 pg/mL (S/N = 3). Moreover, it was validated with high sensitivity and reproducibility. Apparently, the immunosensor may be a very useful tool for monitoring the THC.
Collapse
|
23
|
A novel glutathione-S transferase immunosensor based on horseradish peroxidase and double-layer gold nanoparticles. Biomed Microdevices 2016; 18:50. [DOI: 10.1007/s10544-016-0075-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
24
|
Jia D, Gao J, Wang L, Gao Y, Ye B. Electrochemical behavior of the insecticide pymetrozine at an electrochemically pretreated glassy carbon electrode and its analytical application. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2015; 7:9100-9107. [PMID: 39044378 DOI: 10.1039/c5ay01987g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
Abstract
A simple and sensitive electrochemical method for the determination of the insecticide pymetrozine was proposed using a simple electrochemically pretreated glassy carbon electrode (EPGCE). Compared with the bare GCE, the electrochemical response signal of pymetrozine at the EPGCE showed a significant increase. The electrochemical behavior of pymetrozine was investigated systematically and some dynamics were investigated in detail for the first time. The results indicate that the reaction of pymetrozine on the EPGCE is a two electron and two proton process, which is controlled by both diffusion and adsorption. Under optimum conditions, a good linear relationship was obtained between peak currents and pymetrozine concentrations in the range of 1 × 10-7 to 5 × 10-6 mol L-1 with a detection limit of 8 × 10-8 mol L-1 (S/N = 3). The proposed method was applied to the determination of pymetrozine in real samples with satisfactory recovery results. Finally, the degradation of pymetrozine was also studied in natural soil.
Collapse
Affiliation(s)
- Donglin Jia
- College of Chemistry and Molecular Engineering, School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, PR China.
| | - Jian Gao
- College of Chemistry and Molecular Engineering, School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, PR China.
| | - Lu Wang
- College of Chemistry and Molecular Engineering, School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, PR China.
| | - Yudong Gao
- College of Chemistry and Molecular Engineering, School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, PR China.
| | - Baoxian Ye
- College of Chemistry and Molecular Engineering, School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, PR China.
| |
Collapse
|
25
|
Qiao L, Jiao L, Pang G, Xie J. A novel pungency biosensor prepared with fixing taste-bud tissue of rats. Biosens Bioelectron 2015; 68:454-461. [DOI: 10.1016/j.bios.2015.01.032] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 12/29/2014] [Accepted: 01/14/2015] [Indexed: 01/09/2023]
|
26
|
A sensitive label-free amperometric immunosensor for alpha-fetoprotein based on gold nanorods with different aspect ratio. Sci Rep 2015; 5:9939. [PMID: 25909588 PMCID: PMC4408978 DOI: 10.1038/srep09939] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Accepted: 03/16/2015] [Indexed: 11/08/2022] Open
Abstract
A simple and accurate label-free amperometric immunosensor for α-fetoprotein (AFP) detection is developed based on gold nanorods (GNRs) with different aspect ratio and compared with gold particles (GNPs). The positively charged GNRs and GNPs due to the surface immobilized cetyltrimethyl ammonium bromide (CTAB) can adsorb the negatively charged AFP antibody (Ab) directly. The presence of the GNRs not only enhanced the immobilized amount of biomolecules, but also improved the electrochemical properties of the immunosensor. With the aid of GNRs, the electrochemical signal was greatly enhanced in comparison with GNPs. Under optimal conditions, the proposed immunosensor could detect AFP in a linear range from 0.1 to 200 ng/mL with a detection limit of 0.04 ng/mL (signal-to-noise ratio = 3), and it also possessed good reproducibility and storage stability. Moreover, the detection of AFP in five human serum samples also showed satisfactory accuracy. The proposed methodology was potentially attractive for clinical immunoassay.
Collapse
|
27
|
Lee S, Piao Y. Voltammetric Determination of Clenbuterol on Electrochemically Activated Glassy Carbon Electrode. JOURNAL OF THE KOREAN ELECTROCHEMICAL SOCIETY 2014. [DOI: 10.5229/jkes.2014.17.4.216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
28
|
Sequeira CAC, Santos DMF. Electrochemical behaviour of oxygen reduction on polymer carbon electrodes in alkaline media. RUSS J ELECTROCHEM+ 2012. [DOI: 10.1134/s1023193512070087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
29
|
Kang XB, Pang GC, Liang XY, Wang M, Liu J, Zhu WM. Study on a hydrogen peroxide biosensor based on horseradish peroxidase/GNPs-thionine/chitosan. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2011.12.034] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
30
|
Stevanović SI, Panić VV, Dekanski AB, Tripković AV, Jovanović VM. Relationships between structure and activity of carbon as a multifunctional support for electrocatalysts. Phys Chem Chem Phys 2012; 14:9475-85. [DOI: 10.1039/c2cp40455a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
31
|
Zhang HX, Zhang JH. Voltammetric detection of nitroaromatic compounds using carbon-nanomaterials-based electrodes. CAN J CHEM 2011. [DOI: 10.1139/v10-064] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The morphology of glassy carbon surfaces was investigated by the atomic force microscope (AFM) method. Multi-wall carbon nanotubes (MWCNTs) were purified and investigated with a scanning electron microscope (SEM) and a transmission electron microscope (TEM). An electrochemical technique based on the glassy carbon electrode (GCE) or MWCNT-modified GCEs was used for the detection of nitroaromatic compounds (NACs), namely 2,4,6-trinitrotoluene (TNT), 1,3,5-trinitrobenzene (TNB), 2,4-dinitrotoluene (2,4-DNT), and 1,3-dinitrobenzene (1,3-DNB). MWCNT-modified GCEs were more sensitive than GCEs to TNB, 2,4-DNT, and 1,3-DNB, with the detection limit down to ppb level, whereas the modified GCEs showed lower sensitivity to TNT. In varying degrees, the accumulation of nitro compounds can be promoted by MWCNT-modified GCEs in the detection process, a property which can be attributed to the large surface area and graphene-sheet structure of MWCNTs.
Collapse
Affiliation(s)
- Hong-Xia Zhang
- Department of Chemistry, Liaocheng University, Liaocheng 252059, P. R. China
| | - Jun-Hong Zhang
- Department of Chemistry, Liaocheng University, Liaocheng 252059, P. R. China
| |
Collapse
|
32
|
Ahammad A, Sarker S, Rahman M, Lee JJ. Simultaneous Determination of Hydroquinone and Catechol at an Activated Glassy Carbon Electrode. ELECTROANAL 2010. [DOI: 10.1002/elan.200900449] [Citation(s) in RCA: 125] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
33
|
LI J, YAO Y, SHIU KK. Layer-by-layer Assembly of Prussian Blue and Carbon Nanotube Composites with Poly(diallyldimethylammonium chloride) for the Sensitive Detection of Hydrogen Peroxide. ANAL SCI 2010; 26:431-5. [DOI: 10.2116/analsci.26.431] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Jian LI
- Institute of Analytical Science, Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry, Northwest University
- Department of Chemistry, Hong Kong Baptist University
| | - Yanli YAO
- Department of Chemistry, Hong Kong Baptist University
| | | |
Collapse
|
34
|
Yu CM, Guo JW, Gu HY. Direct electrochemical behavior of hemoglobin at surface of Au@Fe3O4 magnetic nanoparticles. Mikrochim Acta 2009. [DOI: 10.1007/s00604-009-0192-9] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
35
|
Wu AH, Su XL, Fang YM, Sun JJ, Chen GN. Electrogenerated chemiluminescence at bare glassy carbon electrode in basic media. Electrochem commun 2008. [DOI: 10.1016/j.elecom.2008.05.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
|
36
|
Electrochemical Biosensing Platform Using Carbon Nanotube Activated Glassy Carbon Electrode. ELECTROANAL 2007. [DOI: 10.1002/elan.200703896] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
37
|
Shi K, Hu K, Wang S, Lau CY, Shiu KK. Structural studies of electrochemically activated glassy carbon electrode: Effects of chloride anion on the redox responses of copper deposition. Electrochim Acta 2007. [DOI: 10.1016/j.electacta.2007.03.028] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
38
|
Saleh MM, Awad MI, Okajima T, Suga K, Ohsaka T. Characterization of oxidized reticulated vitreous carbon electrode for oxygen reduction reaction in acid solutions. Electrochim Acta 2007. [DOI: 10.1016/j.electacta.2006.09.058] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
39
|
Shi K, Shiu KK. Adsorption of copper and lead species at electrochemically activated glassy carbon electrodes. Electrochim Acta 2006. [DOI: 10.1016/j.electacta.2005.07.044] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
40
|
Surmann P, Zeyat H. Voltammetric analysis using a self-renewable non-mercury electrode. Anal Bioanal Chem 2005; 383:1009-13. [PMID: 16228199 DOI: 10.1007/s00216-005-0069-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2005] [Revised: 07/27/2005] [Accepted: 08/04/2005] [Indexed: 10/25/2022]
Abstract
Galinstan is a new kind of electrode material and the galinstan electrode is a promising alternative to the commonly used mercury electrodes. The eutectic mixture of gallium, indium and tin is liquid at room temperature (m.p. -19 degrees C) and its voltammetric behaviour is similar to that of mercury. The potential windows of use were determined for different pH values and are similar to those obtained with conventional mercury electrodes. Furthermore, the high hydrogen overpotential, which is characteristic for mercury, can be observed when galinstan is used as electrode material. Galinstan can be employed as a liquid electrode in the voltammetric analysis of different metal ions, such as lead and cadmium, in different supporting electrolytes. Our results indicate that the non-toxic liquid alloy galinstan could therefore become immensely important in electrochemical research as a potential surrogate material for mercury.
Collapse
Affiliation(s)
- Peter Surmann
- Institute of Pharmacy, Pharmaceutical Chemistry, Freie Universität Berlin, Königin-Luise-Str. 2+4, 14195 Berlin, Germany.
| | | |
Collapse
|
41
|
Shi K, Shiu KK. Adsorption of some quinone derivatives at electrochemically activated glassy carbon electrodes. J Electroanal Chem (Lausanne) 2004. [DOI: 10.1016/j.jelechem.2004.07.027] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
42
|
Johnson DL, Maxwell CJ, Losic D, Shapter JG, Martin LL. The influence of promoter and of electrode material on the cyclic voltammetry of Pisum sativum plastocyanin. Bioelectrochemistry 2002; 58:137-47. [PMID: 12414319 DOI: 10.1016/s1567-5394(02)00125-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The reversible cyclic voltammetry of pea plastocyanin (Pisum sativum) was studied with a wide range of electrodes: edge-oriented pyrolytic graphite (PGE), glassy carbon (GCE), gold (Au) and platinum (Pt) electrodes. Plastocyanin was coated onto the electrode surface by exploiting the electrostatic interaction between the negatively charged protein and a wide range of positively charged promoters. The effect of the redox response with an extended range of promoters, including poly-L-lysine, polymyxin B, neomycin, tobramycin, geneticin, spermine and spermidine, were included in this study. The resulting cyclic voltammograms reveal that the observed midpoint potential for plastocyanin can be shifted significantly depending on the choice of promoter. The stability of the negatively charged plastocyanin-promoter layer on an electrode was gauged by the rate of bulk diffusion of the protein from the immobilised film into the solution. Reversible cyclic voltammograms were obtained using edge-oriented pyrolytic graphite (PGE) and glassy carbon electrodes (GCE) with all promoters; however, platinum and gold electrodes were unable to sustain a defined redox response. The combination of pyrolytic graphite electrode/poly-L-lysine/plastocyanin was found to be the most stable combination, with a redox response which remained well defined in solution for more than 1 h at pH 7.0. The midpoint potentials obtained in this manner differed between the two graphite electrodes PGE and GCE using poly-L-lysine as the promoter. This effect was in addition to the expected pH dependence of the midpoint potential for plastocyanin and the results indicated that the pK(a) for plastocyanin on PGE was 4.94 compared to that on GCE of 4.66. It is concluded that both the electrode material and the nature of the promoter can influence the position of the redox potentials for proteins measured in vitro. This study extends the range of biogenic promoters used in combination with electrode materials. Thus, we can begin to develop a more comprehensive understanding of electrode-protein interactions and draw conclusions as to metalloprotein function, in vivo. To support these studies, we have sought information as to the nature of the electrode/promoter/protein interaction using scanning tunneling microscopy (STM) to study both the promoter and the plastocyanin protein on a gold surface.
Collapse
Affiliation(s)
- D L Johnson
- Chemistry (SOCPES), Flinders University, Adelaide, SA 5001, Australia
| | | | | | | | | |
Collapse
|