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Zhang R, Zhang L, Yu R, Wang C. Rapid and sensitive detection of methyl parathion in rice based on carbon quantum dots nano-fluorescence probe and inner filter effect. Food Chem 2023; 413:135679. [PMID: 36796262 DOI: 10.1016/j.foodchem.2023.135679] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 02/02/2023] [Accepted: 02/09/2023] [Indexed: 02/13/2023]
Abstract
A highly sensitive fluorescent sensing system of novel carbon quantum dots nano-fluorescent probe based on corn stalks was established for the determination of methyl parathion by alkaline catalytic hydrolysis and inner filter effect mechanism. The carbon quantum dots nano-fluorescent probe was prepared from corn stalks using an optimized one-step hydrothermal method. The detection mechanism of methyl parathion was revealed. The reaction conditions were optimized. The linear range, sensitivity and selectivity of the method were evaluated. Under the optimal conditions, the carbon quantum dots nano-fluorescent probe exhibited high selectivity and sensitivity to methyl parathion, achieving a linear range of 0.005-14 µg/mL. The fluorescence sensing platform was applied to the detection of methyl parathion in rice samples, and the results showed that the recoveries range from 91.64 to 104.28 %, and the relative standard deviations were less than 4.17 %. The detection limit for methyl parathion in rice samples was 1.22 µg/kg, and the limit of quantitation (LOQ) was 4.07 µg/kg, which was very satisfactory.
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Affiliation(s)
- Ruiting Zhang
- College of Food Science, Heilongjiang Bayi Agricultural University, 5 Xinfeng Road, Daqing 163319, China
| | - Liyuan Zhang
- College of Food Science, Heilongjiang Bayi Agricultural University, 5 Xinfeng Road, Daqing 163319, China.
| | - Runzhong Yu
- College of Information and Electrical Engineering, Heilongjiang Bayi Agricultural University, 5 Xinfeng Road, Daqing 163319, China.
| | - Changyuan Wang
- College of Food Science, Heilongjiang Bayi Agricultural University, 5 Xinfeng Road, Daqing 163319, China; Key Laboratory of Agro-products Processing and Quality Safety of Heilongjiang Province, Daqing 163319, China
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Zhang G, Zhang X, Zhang Q, Chen W, Wu S, Yang H, Zhou Y. MnO 2 nanosheets-triggered oxVB 1 fluorescence immunoassay for detection zearalenone. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 286:121954. [PMID: 36228491 DOI: 10.1016/j.saa.2022.121954] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 08/22/2022] [Accepted: 10/03/2022] [Indexed: 06/16/2023]
Abstract
In this study, an alkaline phosphatase (ALP)-mediated fluorescence immunoassay for detecting zearalenone (ZEN) was established based on the oxVB1 fluorescence signal modulated by MnO2 nanosheets (MnO2 NS). As the ALP-antibody content increased, more 2-phosphoascorbic acid (AAP) was hydrolyzed to ascorbic acid (AA) which destroyed the MnO2 NS rapidly. In the lack of MnO2 NS, VB1 cannot be oxidized to oxVB1 for emitting fluorescence. On the contrary, the fluorescence of oxVB1 recovered slowly with the decrease of the ALP-antibody concentration. In the optimization condition, the detection limit of this method was 15.5 pg mL-1. Moreover, the recovery of ZEN in real samples ranged from 94.24 % to 108.26 %, which indicated the remarkable accuracy and reliability of this approach. Meanwhile, the proposal of this fluorescence immunoassay provided a new possibility for detecting other targets by replacing antibodies and antigens.
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Affiliation(s)
- Guohao Zhang
- College of Animal Science, Yangtze University, Jingzhou 434025, China
| | - Xingping Zhang
- College of Life Science, Yangtze University, Jingzhou 434025, China; State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China
| | - Qian Zhang
- College of Animal Science, Yangtze University, Jingzhou 434025, China
| | - Wang Chen
- College of Animal Science, Yangtze University, Jingzhou 434025, China
| | - Shixiang Wu
- College of Animal Science, Yangtze University, Jingzhou 434025, China
| | - Hualin Yang
- College of Animal Science, Yangtze University, Jingzhou 434025, China; College of Life Science, Yangtze University, Jingzhou 434025, China.
| | - Yu Zhou
- College of Animal Science, Yangtze University, Jingzhou 434025, China.
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Development of a pH-Responsive, SO42–-loaded Fe and N co-doped carbon quantum dots-based fluorescent method for highly sensitive detection of glyphosate. Anal Chim Acta 2022; 1221:340110. [DOI: 10.1016/j.aca.2022.340110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 05/18/2022] [Accepted: 06/20/2022] [Indexed: 11/21/2022]
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Liu B, Wu L, Peng Z, Wu S, Qiu P. Monitoring of parathion methyl using a colorimetric gold nanoparticle-based acetylcholinesterase assay. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 268:120665. [PMID: 34865979 DOI: 10.1016/j.saa.2021.120665] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 11/01/2021] [Accepted: 11/24/2021] [Indexed: 06/13/2023]
Abstract
A colorimetric gold nanoparticles (AuNPs)-based acetylcholinesterase (AChE) assay was designed for the first time to measure the concentration of parathion-methyl (PM) in lake water samples. In this assay, the analyte PM inhibited the hydrolysis of acetylthiocholine (ATCh) by AChE, preventing the formation of thiocholine (TCh) that would otherwise react with the AuNPs catalyst and deactivate the catalyst. Therefore, in the presence of PM, the AuNPs catalyzed the oxidation of the 3,3',5,5'-tetramethylbenzidine (TMB) colorimetric indicator to oxTMB, inducing a visual color change from colorless to blue. However, in the absence of PM, AChE hydrolyzed ATCh to TCh, which then reacted with the AuNPs, preventing the oxidation of TMB to oxTMB and rendering the solution colorless. Therefore, the change in the color of the analyte solution indicated the presence of PM, and the absorbance of the resulting solution was measured by UV-Vis spectroscopy to calculate the concentration of PM after generation of a calibration curve. This method was then employed using the smartphone app Color Picker, which converted the color information from the photos of the solution into digital red (R), green (G), and blue (B) values. The ratio of green (G) to blue (B) (G/B) was then plotted against the corresponding concentration to calculate the standard curve, whose regression equation was expressed by y = -0.012x + 1.02 (ng/mL), and the coefficient of determination (R2) was 0.97. In addition, this method was also used to determine the amount of PM in real lake water samples with recovery of 90.2-133.3%.
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Affiliation(s)
- Bicheng Liu
- Department of Chemistry, Nanchang University, Nanchang 330031, China
| | - Liangming Wu
- Department of Chemistry, Nanchang University, Nanchang 330031, China
| | - Zoujun Peng
- Department of Chemistry, Nanchang University, Nanchang 330031, China
| | - Sihao Wu
- Department of Chemistry, Nanchang University, Nanchang 330031, China
| | - Ping Qiu
- Department of Chemistry, Nanchang University, Nanchang 330031, China; Jiangxi Province Key Laboratory of Modern Analytical Science, Nanchang University, Nanchang 330031, China.
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Bi X, Jiang H, Guo X, Wang M, Niu Y, Jia L, Jing X. Density-adjusted liquid-phase microextraction with smartphone digital image colorimetry to determine parathion-methyl in water, fruit juice, vinegar, and fermented liquor. RSC Adv 2022; 12:18127-18133. [PMID: 35800312 PMCID: PMC9210864 DOI: 10.1039/d2ra02760g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 06/13/2022] [Indexed: 11/21/2022] Open
Abstract
Schematic representation of the density-adjusted LPME-SDIC.
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Affiliation(s)
- Xinyuan Bi
- Agricultural Economics and Management College, Shanxi Agricultural University, Taiyuan, Shanxi 030006, China
| | - Haijuan Jiang
- College of Food Science and Engineering, Shanxi Agricultural University, Taigu, Shanxi 030801, China
- Graduate Education Innovation Center on Baijiu Bioengineering in Shanxi Province, Taigu, Shanxi 030801, China
| | - Xingle Guo
- College of Food Science and Engineering, Shanxi Agricultural University, Taigu, Shanxi 030801, China
- Graduate Education Innovation Center on Baijiu Bioengineering in Shanxi Province, Taigu, Shanxi 030801, China
| | - Min Wang
- College of Food Science and Engineering, Shanxi Agricultural University, Taigu, Shanxi 030801, China
- Graduate Education Innovation Center on Baijiu Bioengineering in Shanxi Province, Taigu, Shanxi 030801, China
| | - Yu Niu
- Agricultural Economics and Management College, Shanxi Agricultural University, Taiyuan, Shanxi 030006, China
| | - Liyan Jia
- College of Food Science and Engineering, Shanxi Agricultural University, Taigu, Shanxi 030801, China
- Graduate Education Innovation Center on Baijiu Bioengineering in Shanxi Province, Taigu, Shanxi 030801, China
| | - Xu Jing
- College of Food Science and Engineering, Shanxi Agricultural University, Taigu, Shanxi 030801, China
- Graduate Education Innovation Center on Baijiu Bioengineering in Shanxi Province, Taigu, Shanxi 030801, China
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