1
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Liu T, Huang X, Wang C, Liu J, Mao X. A portable solid sampling visualization nano-sensor for soil Cd based on "three-phase transforming" technique. Talanta 2024; 274:126055. [PMID: 38626695 DOI: 10.1016/j.talanta.2024.126055] [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: 02/03/2024] [Revised: 04/01/2024] [Accepted: 04/04/2024] [Indexed: 04/18/2024]
Abstract
Direct analysis of solid samples is always challenging for ionic sensors due to solidified elemental presence and matrix interference. In this work, a "three-phase transforming" technique was first established to make solid sampling elemental sensors and visual detection possible in the future. For Cd transforming from soil samples, a metal ceramic heater (MCH) electrothermal vaporizer (ETV) coupled with a dielectric barrier discharge quartz trap (DBD-QT) was first utilized to fulfill the solid sampling and preconcentration of Cd in soil; for on-site analysis, a colorimetric sensor based on the trithiocyanuric acid (TMT) functionalized gold nanoparticles (AuNPs) was chosen as a chromogenic analysis model. The portable and miniature ETV-DBD apparatus directly introduced Cd from soil and then captured Cd, consuming only <130 W and 4.5 kg weight; finally, only 200 μL water was injected as eluent to dissolve Cd for the following colorimetric detection. Herein, the Cd analyte underwent a "three-phase transforming" from solid (Cd compounds in soil), to aerosol (vaporization and transportation), to solid (Cd oxides trapped on quartz surface) and to liquid (Cd2+ in eluate). Under optimized conditions, the method limit of detection (LOD) reached 0.04 mg/kg Cd (50 mg sample), fulfilling fast monitoring of Cd contamination in soil, with <20 % relative standard deviations (RSDs). The analysis time was <10 min excluding sample digestion and acid application, as well as the interference of Pb2+ on the AuNPs sensor can be eliminated via the "three-phase transforming" process, proving an excellent anti-interference for solid analysis. This "three-phase transforming" processing technique coupled with colorimetric sensor holds a great potential for direct and on-site analysis in solid samples without complicated handling, providing a fantastic methodology for the application of ionic sensors and making solid sampling elemental sensor and visual detection possible.
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Affiliation(s)
- Tengpeng Liu
- Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs, Beijing 100081, China; College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Xudong Huang
- Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
| | - Chunhui Wang
- Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
| | - Jixin Liu
- Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs, Beijing 100081, China; Beijing Ability Technology Company, Limited, Beijing 100081, China.
| | - Xuefei Mao
- Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs, Beijing 100081, China.
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2
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Shi Y, Wang L, Hu Y, Zhang Y, Le W, Liu G, Tomaschek M, Jiang N, Yetisen AK. Contact lens sensor for ocular inflammation monitoring. Biosens Bioelectron 2024; 249:116003. [PMID: 38227993 DOI: 10.1016/j.bios.2024.116003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 12/15/2023] [Accepted: 01/03/2024] [Indexed: 01/18/2024]
Abstract
Contact lens sensors have been emerging as point-of-care devices in recent healthcare developments for ocular physiological condition monitoring and diagnosis. Fluorescence sensing technologies have been widely applied in contact lens sensors due to their accuracy, high sensitivity, and specificity. As ascorbic acid (AA) level in tears is closely related to ocular inflammation, a fluorescent contact lens sensor incorporating a BSA-Au nanocluster (NC) probe is developed for in situ tear AA detection. The NCs are firstly synthesized to obtain a fluorescent probe, which exhibits high reusability through the quench/recover (KMnO4/AA) process. The probe is then encapsulated with 15 wt% of poly(vinyl alcohol) (PVA) and 1.5 wt% of citric acid (CA) film, and implemented on a closed microfluidic contact lens sensing region. The laser-ablated microfluidic channel in contact lens sensors allows for tear fluid to flow through the sensing region, enabling an in-situ detection of AA. Meanwhile, a smartphone application accompanied by a customized 3D printed readout box is developed for image caption and algorism to quantitative analysis of AA levels. The contact lens sensor is tested within the readout box and the emission signal is collected through the smartphone camera at room temperature with an achieved LOD of 0.178 mmol L-1 (0.0-1.2 mmol L-1). The operational and storage lifetime is also evaluated to characterize the sensor properties and resulted in 20 h and 10 days, respectively. The reusable AA contact lens sensor is promising to lead to an alternative accessible diagnostic method for ocular inflammation in point-of-care settings.
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Affiliation(s)
- Yuqi Shi
- Department of Chemical Engineering, Imperial College London, South Kensington, London, SW7 2BU, UK
| | - Lin Wang
- Department of Chemical Engineering, Imperial College London, South Kensington, London, SW7 2BU, UK
| | - Yubing Hu
- Department of Chemical Engineering, Imperial College London, South Kensington, London, SW7 2BU, UK.
| | - Yihan Zhang
- Department of Chemical Engineering, Imperial College London, South Kensington, London, SW7 2BU, UK
| | - Wenhao Le
- Department of Chemical Engineering, Imperial College London, South Kensington, London, SW7 2BU, UK
| | - Guohui Liu
- Department of Chemical Engineering, Imperial College London, South Kensington, London, SW7 2BU, UK
| | - Michael Tomaschek
- Department of Chemical Engineering, Imperial College London, South Kensington, London, SW7 2BU, UK
| | - Nan Jiang
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, 610041, China; Jinfeng Laboratory, Chongqing, 401329, China.
| | - Ali K Yetisen
- Department of Chemical Engineering, Imperial College London, South Kensington, London, SW7 2BU, UK.
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3
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Gu Y, Jiao L, Cao F, Liu X, Zhou Y, Yang C, Gao Z, Zhang M, Lin P, Han Y, Dong D. A Real-Time Detection Method of Hg 2+ in Drinking Water via Portable Biosensor: Using a Smartphone as a Low-Cost Micro-Spectrometer to Read the Colorimetric Signals. BIOSENSORS 2022; 12:bios12111017. [PMID: 36421135 PMCID: PMC9688040 DOI: 10.3390/bios12111017] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/08/2022] [Accepted: 11/09/2022] [Indexed: 05/31/2023]
Abstract
This paper reported a real-time detection strategy for Hg2+ inspired by the visible spectrophotometer that used a smartphone as a low-cost micro-spectrometer. In combination with the smartphone's camera and optical accessories, the phone's built-in software can process the received light band image and then read out the spectral data in real time. The sensor was also used to detect gold nanoparticles with an LOD of 0.14 μM, which are widely used in colorimetric biosensors. Ultimately, a gold nanoparticles-glutathione (AuNPs-GSH) conjugate was used as a probe to detect Hg2+ in water with an LOD of 1.2 nM and was applied successfully to natural mineral water, pure water, tap water, and river water samples.
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Affiliation(s)
- Yifan Gu
- College of Electronic Engineering (College of Artificial Intelligence), South China Agricultural University, Guangzhou 510642, China
- National Research Center of Intelligent Equipment for Agriculture, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Leizi Jiao
- National Research Center of Intelligent Equipment for Agriculture, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Fengjing Cao
- National Research Center of Intelligent Equipment for Agriculture, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Xinchao Liu
- College of Electronic Engineering (College of Artificial Intelligence), South China Agricultural University, Guangzhou 510642, China
| | - Yunhai Zhou
- National Research Center of Intelligent Equipment for Agriculture, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Chongshan Yang
- National Research Center of Intelligent Equipment for Agriculture, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Zhen Gao
- National Research Center of Intelligent Equipment for Agriculture, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Mengjie Zhang
- College of Electronic Engineering (College of Artificial Intelligence), South China Agricultural University, Guangzhou 510642, China
- National Research Center of Intelligent Equipment for Agriculture, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Peng Lin
- College of Electronic Engineering (College of Artificial Intelligence), South China Agricultural University, Guangzhou 510642, China
- National Research Center of Intelligent Equipment for Agriculture, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Yuxing Han
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- RIOS Lab, Tsinghua University, Shenzhen 518055, China
| | - Daming Dong
- National Research Center of Intelligent Equipment for Agriculture, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
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4
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Wu Z, Dai C, Wang Y, Ma L, Zang G, Liu Q, Zhu S. A novel sensor for visual and selective detection of Hg 2+ based on functionalized doped quantum dots. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:2368-2375. [PMID: 35648434 DOI: 10.1039/d2ay00297c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In this paper, a novel analytical platform for the visual, sensitive and reliable analysis of mercury ions (Hg2+) is fabricated based on functionalized doped quantum dots. We synthesized a new specific nano-material, zinc dithiothreitol combined with graphene quantum dots (ZnNCs-NGQDs), by a simple and convenient method which, as an efficient luminophore, was then applied to construct an electrochemiluminescence (ECL) system for the first time. Under optimized conditions, the ECL sensor showed an excellent response for Hg2+ in the linear range of 1.0 mM to 10 pM, with a low detection limit of 3 pM. Moreover, the proposed method demonstrated satisfactory selectivity, stability and acceptable reproducibility for the detection of Hg2+. The recovery of tap water and lake water samples ranged from 96% to 105%, indicating the potential applicability of the proposed method for monitoring environmental water samples. Meanwhile, visual attempts for mercury ion detection by using doped quantum dots have also obtained satisfactory results. Importantly, our research revealed a viable method for improving the sensitivity and convenience of target studies in sensing fields derived from functional material design.
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Affiliation(s)
- Zhipeng Wu
- Laboratory of Pharmacy and Chemistry, Laboratory of Tissue and Cell Biology, Lab Teaching & Management Centre, Chongqing Medical University, Chongqing 401331, China.
| | - Chenglin Dai
- Laboratory of Pharmacy and Chemistry, Laboratory of Tissue and Cell Biology, Lab Teaching & Management Centre, Chongqing Medical University, Chongqing 401331, China.
| | - Yiwu Wang
- Laboratory of Pharmacy and Chemistry, Laboratory of Tissue and Cell Biology, Lab Teaching & Management Centre, Chongqing Medical University, Chongqing 401331, China.
| | - Lianju Ma
- Laboratory of Pharmacy and Chemistry, Laboratory of Tissue and Cell Biology, Lab Teaching & Management Centre, Chongqing Medical University, Chongqing 401331, China.
| | - Guangchao Zang
- Laboratory of Pharmacy and Chemistry, Laboratory of Tissue and Cell Biology, Lab Teaching & Management Centre, Chongqing Medical University, Chongqing 401331, China.
| | - Qian Liu
- Laboratory of Pharmacy and Chemistry, Laboratory of Tissue and Cell Biology, Lab Teaching & Management Centre, Chongqing Medical University, Chongqing 401331, China.
| | - Shu Zhu
- Laboratory of Pharmacy and Chemistry, Laboratory of Tissue and Cell Biology, Lab Teaching & Management Centre, Chongqing Medical University, Chongqing 401331, China.
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5
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Plasmonic Nano Silver: An Efficient Colorimetric Sensor for the Selective Detection of Hg2+ Ions in Real Samples. COATINGS 2022. [DOI: 10.3390/coatings12060763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Environmental pollution caused by heavy metal ions has become a major health problem across the world. In this study, a selective colorimetric sensor based on starch functionalized silver nanoparticles (St-Ag NPs) for rapid detection of Hg2+ in real samples was developed. The environmentally friendly green approach was utilized to synthesize starch functionalized silver nanoparticles (St-AgNPs). A multi-technique approach involving UV-Vis absorption spectroscopy, Fourier transform infrared (FT-IR), X-ray diffraction (XRD), and scanning electron microscope (SEM) was used for the characterization of St-Ag NPs. These starch functionalized AgNPs were tested for the detection of heavy metals at 25 °C. The screening process revealed clear changes in the AgNPs color and absorption intensity only in the presence of Hg2+ due to the redox reaction between Ag0 and Hg2+. The color and absorption intensity of nanoparticles remain unchanged in the presence of all the other tested metals ion. The proposed method has strong selectivity and sensitivity to Hg2+ ions, with a detection limit of 1 ppm revealed by UV-visible spectrophotometry. The proposed procedure was found to be successful for the detection of Hg2+ in real samples of tap water.
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6
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Yang L, Liu Y, Chen L, Guo L, Lei Y, Wang L. Stable dual-emissive fluorescin@UiO-67 metal-organic frameworks for visual and ratiometric sensing of Al 3+ and ascorbic acid. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 261:120068. [PMID: 34147733 DOI: 10.1016/j.saa.2021.120068] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 06/03/2021] [Accepted: 06/07/2021] [Indexed: 06/12/2023]
Abstract
Encapsulation of fluorophore in metal organic framework (MOF) is an effective method to construct multi-emissive composites. Unfortunately, the small molecules loaded in MOF pores are easy to leak. To overcome this difficulty, fluorescin (FL) is proposed to be encapsulated tightly in the cage of the small tetrahedron of UiO-67, as one of the organic ligands coordinated with the central ion Zr. Finally, stable multi-emission fluorescence was successfully achieved, and Förster resonance energy transfer (FRET) occurred between FL and UiO-67. Ascorbic acid (AA) can dynamically quench the fluorescence of FL@UiO-67 nanoclusters (NCs) through internal filtering effect, photoinduced electron transfer (PET). The detection limit of the probe for AA was as low as 0.20 μM, and the detection range was 0.67 μM-0.36 mM. The probe was further employed to detect Al3+ due to the coordination between Al3+ and the carboxyl group in the FL@UiO-67 NCs. The detection limit for Al3+ was 3.3 nM, and the linear range was 11 nM-5 μM agarose film and test paper were both prepared successfully for visual detection of AA and Al3+. This work provides new ideas for low-cost and convenient real-time detection method.
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Affiliation(s)
- Li Yang
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, China
| | - Yao Liu
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, China
| | - Lili Chen
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, China.
| | - Lulu Guo
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, China
| | - You Lei
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, China
| | - Li Wang
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, China
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7
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Borah N, Kalita AJ, Guha AK, Das MR, Tamuly C. Dual colorimetric sensing of ascorbic acid and thyroxine using Ag-EGCG-CTAB via a DFT approach. RSC Adv 2021; 11:36698-36706. [PMID: 35494345 PMCID: PMC9043532 DOI: 10.1039/d1ra04204a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 10/19/2021] [Indexed: 01/06/2023] Open
Abstract
In this work, a colorimetric approach for the detection of ascorbic acid (AA) and thyroxine (TH) was developed by synthesizing cost-effective silver nanoparticles (AgNPs) decorated with epigallocatechin gallate (EGCG) and CTAB. EGCG is the major bioactive chemical constituent that played a significant role in this study. The environment around the nanoparticle (NP) was controlled by adding CTAB surfactants. The synthesized NPs were characterized by different advanced techniques including XRD, XPS, SEM, and TEM. UV-visible spectra were thoroughly analyzed for sensing of AA and TH and the colour change of the solution can be visually monitored. The change in the localized surface plasmon resonance (LSPR) properties was used as an asset for the detection of AA and TH. A good linear relationship was obtained in both the sensing schemes with a limit of detection (LoD) of 0.67 μM and 0.33 μM for AA and TH respectively. Furthermore, the nanoparticles (NP) were implemented for real-sample analysis (pharmaceutical tablets). A cost-effective filter paper strip-based method coupled with smartphone scanning sensing was developed for the detection of AA. The interaction of AA and TH with the probe was depicted by a density functional theory (DFT) analysis. The synthesized NPs show tremendous selectivity towards AA and TH and excellent potential for practical applications.
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Affiliation(s)
- Nirangkush Borah
- Natural Product Chemistry Section, CSIR-North East Institute of Science and Technology, Branch Itanagar Arunachal Pradesh-791110 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
| | | | - Ankur Kanti Guha
- Department of Chemistry, Cotton University Guwahati Assam-781001 India
| | - Manash R Das
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
- Material Science & Technology Division, CSIR-North East Institute of Science & Technology Jorhat Assam-785006 India
| | - Chandan Tamuly
- Natural Product Chemistry Section, CSIR-North East Institute of Science and Technology, Branch Itanagar Arunachal Pradesh-791110 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
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8
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Amelioration of Tumor Targeting and In Vivo Biodistribution of 99mTc-Methotrexate-Gold Nanoparticles ( 99mTc-Mex-AuNPs). J Pharm Sci 2021; 110:2955-2965. [PMID: 33812886 DOI: 10.1016/j.xphs.2021.03.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 03/25/2021] [Accepted: 03/25/2021] [Indexed: 02/01/2023]
Abstract
Gold nanoparticles (AuNPs) represent very attractive and promising drug delivery carriers due to their unique dimensions, adjustable surface functions, and controllable drug release. Therefore, AuNPs are used to overcome the limitations of conventional chemotherapy, for example methotrexate (Mex), one of the first-generation chemotherapy drugs for cancer treatment, whose usefulness has been restricted due to drug resistance and dose-dependent side effects. In the present study, the AuNPs drug delivery system was synthesized and loaded with technetium-99 m radiolabeled Methotrexate (99mTc-Mex) to produce new potential nanoradiopharmaceutical for tumor targeting and further imaging. The Methotrexate loaded gold nanoparticles (Mex-AuNPs) successfully prepared in small spherical particle size (20.3 nm), polydispersity index PDI (< 0.5) and a zeta potential (-17.6 mV) with loading efficiency% (93 ± 1.2%) of methotrexate at 30 min as an optimum stirring time and showed strong absorption peak for Mex-AuNPs at λmax, 525 nm. The in vitro release profile of Mex-AuNPs showed high release percent of methotrexate at pH 5; the Q0.5 h and Q8h were 21.2 ± 1.5% and 92.9 ± 3.4%, respectively. The in vitro cytotoxicity was investigated at different concentrations (0.024-50 μl/100 μl) of Mex-AuNPs (1 mg/ml) against MCF-7 (Michigan Cancer Foundation-7) breast cancer cells by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide) assay technique. Mex-AuNPs showed higher anticancer activity with low inhibitory concentration (IC50 = 0.098 μl/100 μl) that was three times lower than the inhibitory concentration (IC50) of methotrexate (IC50 = 0.3 μl/100 μl). 99mTc-Mex complex prepared by direct reduction method at maximum radiochemical yield (RCY)% ̴ 98.3 ± 1.09 % was loaded in AuNPs to form 99mTc-Mex-AuNPs with loading efficiency% (93 ± 1.2 %) at 30 min of stirring time. 99mTc-Mex-AuNPs showed convenient in vitro stability in mice serum up to 24 h with RCY% > 90 %. The preclinical biodistribution studies of 99mTc-Mex-AuNPs were performed in 3 experimental groups A (intravenous (I.V.) injected normal mice), B and C (I.V. and intratumor (I.T.) injected tumor bearing mice, respectively). The 99mTc-Mex-AuNPs achieved highest tumor uptake (93 ± 0.39 %ID/g) and highest Target/NonTarget (T/NT) ratio (58.1 ± 0.91) with high Tumor/Blood (T/B) ratio (25.8 ± 0.11) at 10 min post I.T. injection and retained high tumor uptake (79 ± 0.65 %ID/g) up to 60 min post I.T. injection before escaping into blood stream. Consequently, 99mTc-Mex-AuNPs can be considered as new potential nanoradiopharmaceutical in tumor diagnosis.
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9
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Guan H, Song Y, Han B, Gong D, Zhang N. Colorimetric detection of cholesterol based on peroxidase mimetic activity of GoldMag nanocomposites. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 241:118675. [PMID: 32645608 DOI: 10.1016/j.saa.2020.118675] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 06/21/2020] [Accepted: 06/26/2020] [Indexed: 06/11/2023]
Abstract
Herein, Gold and magnetic particles (GoldMag), an enzyme mimetic of horseradish peroxidase (HRP), have been designed to construct a colorimetric sensor for cholesterol (Cho). The well-dispersed GoldMag was successfully prepared by green reduction using a self-assembly method based on the surface amino groups, and characterized by Fourier transform infrared (FTIR), X-Ray Photoelectron Spectroscopic (XPS) techniques. In the presence of H2O2, the resulting nanocomposites possessed enhanced intrinsic peroxidase-like activity and could catalytically oxidize 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) to produce a green colored product, which could be observed apparently by the naked eye. Based on the outstanding catalytic activity, the designed colorimetric sensor displayed a linear response for cholesterol in the range from 0.1 mg/mL to 7.5 mg/mL with a detection limit as low as 0.003 mg/mL. The proposed method was validated to determine cholesterol in real samples with satisfactory results.
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Affiliation(s)
- Huanan Guan
- College of Food Engineering, Harbin University of Commerce, Harbin 150076, People's Republic of China.
| | - Yan Song
- College of Food Engineering, Harbin University of Commerce, Harbin 150076, People's Republic of China
| | - Bolin Han
- College of Food Engineering, Harbin University of Commerce, Harbin 150076, People's Republic of China
| | - Dezhuang Gong
- College of Food Engineering, Harbin University of Commerce, Harbin 150076, People's Republic of China
| | - Na Zhang
- College of Food Engineering, Harbin University of Commerce, Harbin 150076, People's Republic of China
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10
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Mirsalari M, Elhami S. Colorimetric detection of insulin in human serum using GO/AuNPs/TX-100 nanocomposite. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 240:118617. [PMID: 32593845 DOI: 10.1016/j.saa.2020.118617] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 06/04/2020] [Accepted: 06/09/2020] [Indexed: 06/11/2023]
Abstract
In this study, graphene oxide/gold nanoparticles/Triton X-100 nanocomposites (GO/AuNPs/TX-100) were synthesized using the sonochemical method and their ability in ultrasound-assisted colorimetric detection of insulin was investigated. The synthesized GO/AuNPs/TX-100 nanocomposites were characterized by UV-visible absorption spectroscopy and TEM analysis. The interaction between the nanocomposites and insulin was observed by both naked eye and optical absorption spectroscopy. The GO/AuNPs/TX-100 nanocomposites displayed apparent color changes (red to blue) and absorption spectra changes (decreasing of the band around 528 nm and appearance of a new red-shifted band at 640 nm) in presence of insulin. The interaction mechanism of the nanocomposites and insulin was discussed. It is based on the special structure of insulin, that insulin can be easily self-assemble into the GO/AuNP/TX-100 nanocomposites and can also play the role of a bridge between two different GO/AuNPs/TX-100 nanocomposites by peptide chains. The effective parameters for insulin detection were optimized. The colorimetric method was used for quantification of insulin in the range of 2-300 ng mL-1 with a detection limit of 0.1 ng mL-1. Moreover, the relative standard deviation of the method was 3.1 and 2.7% (n = 10) at concentrations of 50 and 200 ng mL-1, respectively on the same day and 4.8% at a concentration (200.0 ng mL-1) on five consecutive days. The present method was utilized for insulin assay in human blood serums with satisfactory results.
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Affiliation(s)
- Marzieh Mirsalari
- Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
| | - Shahla Elhami
- Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.
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11
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Li X, Duan Q, Yu Y, Wang K, Zhu H, Zhang X, Liu C, Jia P, Li Z, Sheng W, Zhu B. A coumarin-based fluorescent probe for Hg 2+ and its application in living cells and zebrafish. LUMINESCENCE 2020; 35:941-946. [PMID: 32324318 DOI: 10.1002/bio.3808] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 03/30/2020] [Accepted: 04/01/2020] [Indexed: 01/25/2023]
Abstract
Mercury (Hg) is a heavy metal with high toxicity and easy migration; it can be enriched through the food chain, and cause serious threats to the natural environment and human health. So, the development of a method that can be used to detect mercury ions (Hg2+ ) in the environment, in cells, and in organisms is very important. Here, a new 7-hydroxycoumarin-derived carbonothioate-based probe (CC-Hg) was designed and synthesized for detection of Hg2+ . After addition of Hg2+ , a large fluorescence enhancement was observed due to the formation of 7-hydroxyl, which reinforced the intramolecular charge transfer process. The CC-Hg probe had good water solubility and selectivity. Moreover, the probe was able to detect Hg2+ quantitatively over the concentration range 0-2 μM and with a detection limit of 7.9 nM. Importantly, we successfully applied the probe to detect Hg2+ in water samples, in living cells, and in zebrafish. The experimental results demonstrated its potential value in practical applications.
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Affiliation(s)
- Xiwei Li
- School of Water Conservancy and Environment, University of Jinan, Jinan, China
| | - Qingxia Duan
- School of Water Conservancy and Environment, University of Jinan, Jinan, China
| | - Yamin Yu
- School of Water Conservancy and Environment, University of Jinan, Jinan, China
| | - Kun Wang
- School of Water Conservancy and Environment, University of Jinan, Jinan, China
| | - Hanchuang Zhu
- School of Water Conservancy and Environment, University of Jinan, Jinan, China
| | - Xue Zhang
- School of Water Conservancy and Environment, University of Jinan, Jinan, China
| | - Caiyun Liu
- School of Water Conservancy and Environment, University of Jinan, Jinan, China
| | - Pan Jia
- School of Water Conservancy and Environment, University of Jinan, Jinan, China
| | - Zilu Li
- School of Water Conservancy and Environment, University of Jinan, Jinan, China
| | - Wenlong Sheng
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Baocun Zhu
- School of Water Conservancy and Environment, University of Jinan, Jinan, China
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12
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de Faria LV, Lisboa TP, de Farias DM, Araujo FM, Machado MM, de Sousa RA, Matos MAC, Muñoz RAA, Matos RC. Direct analysis of ascorbic acid in food beverage samples by flow injection analysis using reduced graphene oxide sensor. Food Chem 2020; 319:126509. [PMID: 32193056 DOI: 10.1016/j.foodchem.2020.126509] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 02/13/2020] [Accepted: 02/25/2020] [Indexed: 02/06/2023]
Abstract
In this paper, a simple, sensitive and precise electroanalytical method was developed using flow injection analysis (FIA) with amperometric detection and reduced graphene oxide sensor for ascorbic acid determination in samples of multivitamin beverages, milk, fermented milk, and milk chocolate. The advantages of this sensor include a potential displacement of 450 mV and a 2-fold peak current increase for electrochemical oxidation of ascorbic acid, which resulted in a highly sensitive method. No interference of sample matrix was observed, avoiding solvent extraction procedures (samples were only diluted). The FIA allowed a high analytical frequency, approximately 96 injections per hour, together with adequate detection limit of 4.7 μmol L-1. Good precision (RSD < 7%) and accuracy (recoveries between 91 and 108%) evidenced the robustness of the method. The method was compared with ultra-fast liquid chromatography (UFLC) obtaining statistically similar results (95% confidence level). The ascorbic acid content in samples varied from 0.065 to 2.53 mmol L-1.
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Affiliation(s)
- Lucas Vinícius de Faria
- NUPIS (Núcleo de Pesquisa em Instrumentação e Separações Analíticas), Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, 36036 900 Juiz de For a MG, Brazil
| | - Thalles Pedrosa Lisboa
- BACCAN (Grupo Baccan de Química Analítica), Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, 36036 330 Juiz de For a MG, Brazil.
| | - Davi Marques de Farias
- NUPIS (Núcleo de Pesquisa em Instrumentação e Separações Analíticas), Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, 36036 900 Juiz de For a MG, Brazil
| | - Fausto Moreira Araujo
- NUPIS (Núcleo de Pesquisa em Instrumentação e Separações Analíticas), Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, 36036 900 Juiz de For a MG, Brazil
| | - Mateus Moura Machado
- NUPIS (Núcleo de Pesquisa em Instrumentação e Separações Analíticas), Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, 36036 900 Juiz de For a MG, Brazil
| | - Rafael Arromba de Sousa
- BACCAN (Grupo Baccan de Química Analítica), Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, 36036 330 Juiz de For a MG, Brazil
| | - Maria Auxiliadora Costa Matos
- NUPIS (Núcleo de Pesquisa em Instrumentação e Separações Analíticas), Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, 36036 900 Juiz de For a MG, Brazil
| | | | - Renato Camargo Matos
- BACCAN (Grupo Baccan de Química Analítica), Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, 36036 330 Juiz de For a MG, Brazil
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13
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Hu Y, Yue C, Wang J, Zhang Y, Fang W, Dang J, Wu Y, Zhao H, Li Z. Fe–Ni metal–organic frameworks with prominent peroxidase-like activity for the colorimetric detection of Sn2+ ions. Analyst 2020; 145:6349-6356. [DOI: 10.1039/d0an00801j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The synthesized Fe–Ni-MOF could oxidize TMB to produce oxTMB with blue color. The presence of Sn2+ ions could make the oxTMB color lighter, hence colorimetric detection of Sn2+ ions is realized.
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Affiliation(s)
- Ye Hu
- School of Chemical Sciences
- University of Chinese Academy of Sciences
- Beijing 100049
- PR China
| | - Chaochao Yue
- School of Chemical Sciences
- University of Chinese Academy of Sciences
- Beijing 100049
- PR China
| | - Jing Wang
- School of Chemical Sciences
- University of Chinese Academy of Sciences
- Beijing 100049
- PR China
| | - Yuhua Zhang
- School of Chemical Sciences
- University of Chinese Academy of Sciences
- Beijing 100049
- PR China
| | - Wenhui Fang
- School of Chemical Sciences
- University of Chinese Academy of Sciences
- Beijing 100049
- PR China
| | - Jiaqi Dang
- School of Chemical Sciences
- University of Chinese Academy of Sciences
- Beijing 100049
- PR China
| | - Ying Wu
- School of Chemical Sciences
- University of Chinese Academy of Sciences
- Beijing 100049
- PR China
| | - Hong Zhao
- School of Chemical Sciences
- University of Chinese Academy of Sciences
- Beijing 100049
- PR China
| | - Zengxi Li
- School of Chemical Sciences
- University of Chinese Academy of Sciences
- Beijing 100049
- PR China
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14
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Guan H, Han B, Gong D, Song Y, Liu B, Zhang N. Colorimetric sensing for ascorbic acid based on peroxidase-like of GoldMag nanocomposites. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 222:117277. [PMID: 31229917 DOI: 10.1016/j.saa.2019.117277] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 06/03/2019] [Accepted: 06/14/2019] [Indexed: 05/13/2023]
Abstract
A new scheme for sensitive and rapid colorimetric detection of ascorbic acid (AA) has been developed by the GoldMag-ABTS free radical scavenging system. The well-dispersed Gold and magnetic particles (GoldMag) was successfully prepared by self-assembly method and characterized by Fourier transform infrared (FTIR), X-Ray Photoelectron Spectroscopic (XPS) techniques. Nanocomposites combine the advantages of superparamagnetic, biocompatibility and high catalytic activity of Fe3O4 and gold nanoparticles (AuNPs) and exhibit enhanced the intrinsic peroxidase-like activity, which can be used to catalyze the oxidation of the peroxidase substrates 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) produce a green-colored product in presence of hydrogen peroxide. Ascorbic acid as an effective antioxidant have scavenging effects on ABTS radicals and induce the reduction of green ABTS.+ to colorless ABTS2-, resulting in a significant green color fading. On this basis, a rapid, sensitive and selective colorimetric assay for ascorbic acid has been developed. Under optimal conditions, ascorbic acid has a linear response range from 0.01 mmol/L to 1 mmol/L with a detection limit of 0.12 μmol/L and a short assay time of the 30 s. Furthermore, the colorimetric system showed good sensitivity, stability, selectivity, and repeatability. It also successfully applied to the determination of ascorbic acid in real samples.
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Affiliation(s)
- Huanan Guan
- College of Food Engineering, Harbin University of Commerce, Harbin 150076, People's Republic of China.
| | - Bolin Han
- College of Food Engineering, Harbin University of Commerce, Harbin 150076, People's Republic of China
| | - Dezhuang Gong
- College of Food Engineering, Harbin University of Commerce, Harbin 150076, People's Republic of China
| | - Yan Song
- College of Food Engineering, Harbin University of Commerce, Harbin 150076, People's Republic of China
| | - Bo Liu
- College of Food Engineering, Harbin University of Commerce, Harbin 150076, People's Republic of China
| | - Na Zhang
- College of Food Engineering, Harbin University of Commerce, Harbin 150076, People's Republic of China
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15
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Tan X, Liu X, Zeng W, Zhang Z, Huang T, Yu L, Zhao G. Colorimetric sensing towards spermine based on supramolecular pillar[5]arene reduced and stabilized gold nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 221:117176. [PMID: 31158763 DOI: 10.1016/j.saa.2019.117176] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 05/17/2019] [Accepted: 05/26/2019] [Indexed: 06/09/2023]
Abstract
We develop a novel and fast colorimetric sensing platform for spermine (Sp) by using macrocyclic host hydroxyl pillar[5]arene (P5) molecule reduced and stabilized Au nanoparticles via the supramolecular host-guest recognition interaction between P5 and Sp. The P5-modified Au nanoparticles (P5-Au) are easily obtained by redox reaction between hydroxyl groups in P5 and Au3+ in HAuCl4, where hydroxyl groups are oxidized to carboxyl groups and Au3+ is reduced to Au0+ under alkali catalysis at room temperature without NaBH4 or other reducing agent. A uniform diameter of about 5.0 nm and wine red color P5-Au nanoparticles can be synthesized by this green and rapid method. The mechanism of redox reaction between P5 and HAuCl4 is studied by the XPS and 13C NMR, and the P5-Au is characterized by the TEM, XRD and XPS.
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Affiliation(s)
- Xiaoping Tan
- Key Lab of Inorganic Special Functional Materials, Chongqing Municipal Education Commission, School of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling 408100, China.
| | - Xi Liu
- Key Lab of Inorganic Special Functional Materials, Chongqing Municipal Education Commission, School of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling 408100, China
| | - Wenjie Zeng
- Key Lab of Inorganic Special Functional Materials, Chongqing Municipal Education Commission, School of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling 408100, China
| | - Zhong Zhang
- Key Lab of Inorganic Special Functional Materials, Chongqing Municipal Education Commission, School of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling 408100, China
| | - Ting Huang
- Key Lab of Inorganic Special Functional Materials, Chongqing Municipal Education Commission, School of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling 408100, China
| | - Long Yu
- Key Lab of Inorganic Special Functional Materials, Chongqing Municipal Education Commission, School of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling 408100, China
| | - Genfu Zhao
- Key Lab of Inorganic Special Functional Materials, Chongqing Municipal Education Commission, School of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling 408100, China.
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Peng J, Liang X. Progress in research on gold nanoparticles in cancer management. Medicine (Baltimore) 2019; 98:e15311. [PMID: 31045767 PMCID: PMC6504334 DOI: 10.1097/md.0000000000015311] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 03/20/2019] [Accepted: 03/25/2019] [Indexed: 12/13/2022] Open
Abstract
INTRODUCTION The rapid advancement of nanotechnology in recent years has fuelled burgeoning interest in the field of nanoparticle research, particularly its application in cancer management. At present, there seems to be heightened interest in the application of gold nanoparticles (AuNPs) to the management of cancer, encompassing diagnosis, monitoring, and treatment. AuNPs could be used as drug delivery agents that target cancer cells or in gene therapy. These efforts are undertaken in the hope of revolutionizing current methods and strategies for cancer treatment. This review will focus on the current applications of AuNPs in cancer management. OBJECTIVES, DATA SOURCES, STUDY APPRAISAL AND SYNTHESIS METHODS, RESULTS:: objectives, data sources, study eligibility criteria, participants, and interventions, study appraisal and synthesis methods, results are not required, as the study will be a literature review. Just introduction, ethics and dissemination, and conclusion are applicable. ETHICS AND DISSEMINATION Ethical approval and informed consent are not required, as the study is a literature review and does not involve direct contact with patients or alterations to patient care. CONCLUSION AuNPs have many properties that are of great value for the diagnosis and treatment of tumors. AuNPs are small in size and can penetrate widely and deposit on the tumor site, bind to many proteins and drugs, target delivery drugs, and have good biocompatibility. The application of AuNPs in the diagnosis and treatment of tumors is very considerable. In the near future, AuNPs will certainly play an important role in the treatment of tumors.
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17
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Lv W, Qin W, Chen Y, Chen X. Fabrication of Co 3O 4 NPs-graphene oxide nanocomposites as an efficient catalyst towards oxygen reduction and its catalytic applications. J Colloid Interface Sci 2019; 538:125-131. [PMID: 30502533 DOI: 10.1016/j.jcis.2018.11.089] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 11/20/2018] [Accepted: 11/23/2018] [Indexed: 11/16/2022]
Abstract
Co3O4 nanoparticles-graphene oxide (Co3O4 NPs-GO) nanocomposites with good solubility were successfully synthesized and well characterized. As a nanocatalyst with oxidase-mimicking activity, the nanocomposites can catalyze the oxidation of 3',5,5'-tetramethylbenzidine (TMB) with high efficiency. The catalyzing reaction was rapid and no extra H2O2 was needed compared with other similar TMB oxidation reactions. The catalyzing reaction mechanism of the system was investigated in detail. And it was demonstrated that the oxygen involved in the reaction came from the oxygen absorbed on the nanocomposites which oxidized TMB. Based on this reaction, a colorimetric system for vitamin C detection in vegetable and fruits was established. Under the optimum conditions, the detection can be achieved within 10 min and a linear relationship in concentration range of 2.5 × 10-6 to 1.8 × 10-5 M and 3.4 × 10-5 to 1.7 × 10-4 M was obtained with a detection limit of 7.0 × 10-7 M. The colorimetric system exhibited good selectivity, sensitivity and satisfactory recoveries ranged from 93.1% to 101.1%.
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Affiliation(s)
- Wenjuan Lv
- Department of Chemistry , Lanzhou University, Lanzhou 730000, PR China
| | - Wenjie Qin
- Department of Chemistry , Lanzhou University, Lanzhou 730000, PR China; Qinghai Institute of Product Quality Supervision and Inspection, Xining 810000, PR China
| | - Yonglei Chen
- Department of Chemistry , Lanzhou University, Lanzhou 730000, PR China.
| | - Xingguo Chen
- Department of Chemistry , Lanzhou University, Lanzhou 730000, PR China.
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18
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Liu H, Gao X, Zhuang X, Tian C, Wang Z, Li Y, Rogach AL. A specific electrochemiluminescence sensor for selective and ultra-sensitive mercury(ii) detection based on dithiothreitol functionalized copper nanocluster/carbon nitride nanocomposites. Analyst 2019; 144:4425-4431. [DOI: 10.1039/c9an00667b] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A novel electrochemiluminescence sensor based on the combination of copper nanoclusters and carbon nitride nanosheets was fabricated for detecting Hg2+.
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Affiliation(s)
- Huitao Liu
- College of Chemistry and Chemical Engineering
- Yantai University
- Yantai 264005
- China
| | - Xueqing Gao
- College of Chemistry and Chemical Engineering
- Yantai University
- Yantai 264005
- China
| | - Xuming Zhuang
- College of Chemistry and Chemical Engineering
- Yantai University
- Yantai 264005
- China
- Department of Materials Science and Engineering
| | - Chunyuan Tian
- College of Chemistry and Chemical Engineering
- Yantai University
- Yantai 264005
- China
| | - Zhenguang Wang
- College of Chemistry and Environmental Science
- Hebei University
- Baoding 071002
- China
| | - Yanxiu Li
- Department of Materials Science and Engineering
- and Centre for Functional Photonics (CFP)
- City University of Hong Kong
- Kowloon
- Hong Kong SAR
| | - Andrey L. Rogach
- Department of Materials Science and Engineering
- and Centre for Functional Photonics (CFP)
- City University of Hong Kong
- Kowloon
- Hong Kong SAR
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19
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Chen Z, Wang H, Zhang Z, Chen L. Chemical Redox-Cycling for Improving the Sensitivity of Colorimetric Enzyme-Linked Immunosorbent Assay. Anal Chem 2018; 91:1254-1259. [PMID: 30557502 DOI: 10.1021/acs.analchem.8b05095] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Herein, a redox-cycling was proposed to amplify the signal of enzyme-linked immunosorbent assay (ELISA), which was performed in a polystyrene microplate based on a classic sandwich-type. After the sandwich immunoreactions were finished, the alkaline phosphatase captured on a microplate triggered the hydrolyzation of l-ascorbic acid 2-phosphate to generate ascorbic acid (AA), which then reduced colorless tris(bathophenanthroline) iron(III) (Fe(BPT)33+) encapsulated in the micelle of TX-100 to pink red tris(bathophenanthroline) iron(II) (Fe(BPT)32+). In the presence of tris(2-carboxyethyl)phosphine, the oxidation product, dehydroascorbic acid, was transformed to AA quickly which then reduced Fe(BPT)33+ again and again, resulting in the generation of abundant Fe(BPT)32+ that could be read out conveniently by a commercial microplate reader or the naked eye. Because the negative charged TCEP with large size could hardly pass through the micelle, the reduction of Fe(BPT)33+ by TCEP directly was negligible. Experiment results for assay of alpha-fetoprotein (a model antigen) showed the cycling greatly improved the detection limit to 5 pg/mL, 2 orders of magnitude lower than that of conventional ELISA. The cycling also exhibited the advantages of simplicity and high reproducibility, implying its great potential for practical applications in biological and clinical diagnosis.
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Affiliation(s)
- Zhaopeng Chen
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation , Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences(CAS) and Shandong Provincial Key Laboratory of Coastal Environmental Processes, YICCAS , Yantai , Shandong 264003 , P. R. China.,Department of Applied Chemistry, School of Science , Xi'an University of Technology , Xi'an 710061 , P. R. China
| | - Han Wang
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation , Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences(CAS) and Shandong Provincial Key Laboratory of Coastal Environmental Processes, YICCAS , Yantai , Shandong 264003 , P. R. China.,University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Zhiyang Zhang
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation , Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences(CAS) and Shandong Provincial Key Laboratory of Coastal Environmental Processes, YICCAS , Yantai , Shandong 264003 , P. R. China.,University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Lingxin Chen
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation , Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences(CAS) and Shandong Provincial Key Laboratory of Coastal Environmental Processes, YICCAS , Yantai , Shandong 264003 , P. R. China.,Laboratory for Marine Biology and Biotechnology , Pilot National Laboratory for Marine Science and Technology , Qingdao 266237 , P.R. China
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20
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Colorimetric and dark-field microscopic determination of cadmium(II) using unmodified gold nanoparticles and based on the formation of glutathione-cadmium(II) complexes. Mikrochim Acta 2018; 186:37. [DOI: 10.1007/s00604-018-3166-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 12/09/2018] [Indexed: 12/25/2022]
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21
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Liu G, Lu M, Huang X, Li T, Xu D. Application of Gold-Nanoparticle Colorimetric Sensing to Rapid Food Safety Screening. SENSORS (BASEL, SWITZERLAND) 2018; 18:E4166. [PMID: 30486466 PMCID: PMC6308472 DOI: 10.3390/s18124166] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Revised: 11/26/2018] [Accepted: 11/26/2018] [Indexed: 12/20/2022]
Abstract
Due to their unique optical properties, narrow size distributions, and good biological affinity, gold nanoparticles have been widely applied in sensing analysis, catalytic, environmental monitoring, and disease therapy. The color of a gold nanoparticle solution and its maximum characteristic absorption wavelength will change with the particle size and inter-particle spacing. These properties are often used in the detection of hazardous chemicals, such as pesticide residues, heavy metals, banned additives, and biotoxins, in food. Because the gold nanoparticles-colorimetric sensing strategy is simple, quick, and sensitive, this method has extensive applications in real-time on-site monitoring and rapid testing of food quality and safety. Herein, we review the preparation methods, functional modification, photochemical properties, and applications of gold nanoparticle sensors in rapid testing. In addition, we elaborate on the colorimetric sensing mechanisms. Finally, we discuss the advantages and disadvantages of colorimetric sensors based on gold nanoparticles, and directions for future development.
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Affiliation(s)
- Guangyang Liu
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Vegetables Quality and Safety Control, Ministry of Agriculture and Rural Affairs of China, Beijing 100081, China.
- College of Life Sciences and Engineering, Hebei University of Engineering, Handan 056021, China.
| | - Meng Lu
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Vegetables Quality and Safety Control, Ministry of Agriculture and Rural Affairs of China, Beijing 100081, China.
- College of Life Sciences and Engineering, Hebei University of Engineering, Handan 056021, China.
| | - Xiaodong Huang
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Vegetables Quality and Safety Control, Ministry of Agriculture and Rural Affairs of China, Beijing 100081, China.
| | - Tengfei Li
- College of Life Sciences and Engineering, Hebei University of Engineering, Handan 056021, China.
| | - Donghui Xu
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Vegetables Quality and Safety Control, Ministry of Agriculture and Rural Affairs of China, Beijing 100081, China.
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22
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Xu D, Yu S, Yin Y, Wang S, Lin Q, Yuan Z. Sensitive Colorimetric Hg 2+ Detection via Amalgamation-Mediated Shape Transition of Gold Nanostars. Front Chem 2018; 6:566. [PMID: 30538981 PMCID: PMC6277514 DOI: 10.3389/fchem.2018.00566] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 10/31/2018] [Indexed: 12/29/2022] Open
Abstract
Reliable and sensitive methods to monitor mercury levels in real samples are highly important for environment protection and human health. Herein, a label-free colorimetric sensor for Hg2+ quantitation using gold nanostar (GNS) has been demonstrated, based on the formation of Au-Hg amalgamate that leads to shape-evolution of the GNS and changes in its absorbance. Addition of ascorbic acid (AA) to GNS solution is important for quantitation of Hg2+, mainly because it can reduce Hg2+ to Hg to enhance amalgamation on the GNSs and stabilize GNSs. In addition to transmission electron microscopy images, the distribution of circular ratios of GNSs in the presence of 2 mM AA and various concentrations of Hg2+ are used to show the morphology changes of the GNSs. Upon increasing the concentration of Hg2+, the average circular ratio of GNSs decreases, proving GNS is approaching to sphere. The morphology change alters the longitudinal localized surface plasmonic resonance (LSPR) absorbance of the GNSs significantly. Under the optimum conditions, our sensor exhibits a dynamic response for Hg2+ in the range of 1–4,000 nM with a detection limit of 0.24 nM. Upon Increasing Hg2+ concentration, the solution color changes from greenish-blue, purple to red, which can be distinguished by the naked eye when the Hg2+ concentration is higher than 250 nM. Owing to having a high surface-to-volume ratio and affinity toward Hg0, the GNS is sensitive and selective (at least 50-fold over tested metal ions like Pb2+) toward Hg2+ in the presence of AA. Practicality of this assay has been validated by the analysis of water samples without conducting tedious sample pretreatment.
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Affiliation(s)
- Dong Xu
- National Engineering Laboratory for Rice and By-Products Further Processing, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, China.,Hunan Key Laboratory of Processed Food for Special Medical Purpose, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, China
| | - Shufang Yu
- National Engineering Laboratory for Rice and By-Products Further Processing, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, China.,Hunan Key Laboratory of Processed Food for Special Medical Purpose, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, China
| | - Yueqin Yin
- National Engineering Laboratory for Rice and By-Products Further Processing, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, China.,Hunan Key Laboratory of Processed Food for Special Medical Purpose, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, China
| | - Suyan Wang
- National Engineering Laboratory for Rice and By-Products Further Processing, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, China.,Hunan Key Laboratory of Processed Food for Special Medical Purpose, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, China
| | - Qinlu Lin
- National Engineering Laboratory for Rice and By-Products Further Processing, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, China.,Hunan Key Laboratory of Processed Food for Special Medical Purpose, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, China
| | - Zhiqin Yuan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China
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23
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Kanellis VG. Sensitivity limits of biosensors used for the detection of metals in drinking water. Biophys Rev 2018; 10:1415-1426. [PMID: 30225681 PMCID: PMC6233349 DOI: 10.1007/s12551-018-0457-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 09/10/2018] [Indexed: 12/13/2022] Open
Abstract
Even when present in very low concentrations, certain metal ions can have significant health impacts depending on their concentration when present in drinking water. In an effort to detect and identify trace amounts of such metals, environmental monitoring has created a demand for new and improved methods that have ever-increasing sensitivities and selectivity. This paper reviews the sensitivities of over 100 recently published biosensors using various analytical techniques such as fluorescence, voltammetry, inductively coupled plasma techniques, spectrophotometry and visual colorimetric detection that display selectivity for copper, cadmium, lead, mercury and/or aluminium in aqueous solutions.
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