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Ouyang Q, Liu X, Tan R, Guo L, Liu F, Wan Y. Polyclonal antibody-based indirect competitive enzyme-linked immunosorbent assay for screening of paclobutrazol in fruits. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2019; 55:250-256. [PMID: 31694450 DOI: 10.1080/03601234.2019.1685319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Paclobutrazol (PBZ) is a plant growth regulator (PGR) widely used in fruit and vegetable cultivation. However, due to the severe toxicity of PBZ, a sub-ppm level maximum residue limit (MRL) was established worldwide. Therefore, it is significant to propose a rapid, sensitive and high throughput screening method for monitoring the PBZ residues in foods. In this study, a simple and sensitive indirect competitive Enzyme-linked immunosorbent assay (icELISA) was established for PBZ detection in fruits basing polyclonal antibody. For both economy and pollution prevention, a microwave-solvent-free method was used to synthesize the PBZ hapten with high efficiency. The detection conditions, such as coating antigen concentration, antibody concentration, organic reagent concentration, ionic strength and pH, were optimized. Under the optimized conditions, this method showed high sensitivity and specificity. The detection range is 1.27-138.23 ng/mL, half-maximum inhibition concentration (IC50) is 13.26 ng/mL, and the IC20 was lower than the reported ELISAs for PBZ. Additionally, this method had high accuracy and precision. The recoveries were ranged from 88.78% to 96.80% in PBZ spiked apple samples with RSD below 4%. All the results showed that the polyclonal antibody based icELISA could be useful for PBZ screening in fruit samples.
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Affiliation(s)
- Qiuli Ouyang
- College of Chemistry, Nanchang University, Nanchang, Jiangxi, P. R. China
| | - Xiangxiang Liu
- College of Chemistry, Nanchang University, Nanchang, Jiangxi, P. R. China
| | - Rongxia Tan
- College of Chemistry, Nanchang University, Nanchang, Jiangxi, P. R. China
| | - Lan Guo
- College of Chemistry, Nanchang University, Nanchang, Jiangxi, P. R. China
- Jiangxi Province Key Laboratory of Modern Analytical Science, Nanchang University, Nanchang, Jiangxi, P. R. China
- Center of Analysis and Testing, Nanchang University, Nanchang, Jiangxi, P. R. China
| | - Fan Liu
- Jiangxi Province Key Laboratory of Modern Analytical Science, Nanchang University, Nanchang, Jiangxi, P. R. China
- Center of Analysis and Testing, Nanchang University, Nanchang, Jiangxi, P. R. China
| | - Yiqun Wan
- College of Chemistry, Nanchang University, Nanchang, Jiangxi, P. R. China
- Jiangxi Province Key Laboratory of Modern Analytical Science, Nanchang University, Nanchang, Jiangxi, P. R. China
- Center of Analysis and Testing, Nanchang University, Nanchang, Jiangxi, P. R. China
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Molecularly imprinted mesoporous silica embedded with carbon dots and semiconductor quantum dots as a ratiometric fluorescent sensor for diniconazole. Biosens Bioelectron 2017; 96:121-126. [DOI: 10.1016/j.bios.2017.04.045] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 04/19/2017] [Accepted: 04/27/2017] [Indexed: 01/15/2023]
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Liu Z, Wei X, Ren K, Zhu G, Zhang Z, Wang J, Du D. Highly efficient detection of paclobutrazol in environmental water and soil samples by time-resolved fluoroimmunoassay. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 569-570:1629-1634. [PMID: 27320734 DOI: 10.1016/j.scitotenv.2016.06.089] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 06/13/2016] [Accepted: 06/13/2016] [Indexed: 06/06/2023]
Abstract
A fast and ultrasensitive indirect competitive time-resolved fluoroimmunoassay (TRFIA) was developed for the analysis of paclobutrazol in environmental water and soil samples. Paclobutrazol hapten was synthesized and conjugated to bovine serum albumin (BSA) for producing polyclonal antibodies. Under optimal conditions, the 50% inhibitory concentration (IC50 value) and limit of detection (LOD, IC20 value) were 1.09μgL(-1) and 0.067μgL(-1), respectively. The LOD of TRFIA was improved 30-fold compared to the already reported ELISA. There was almost no cross-reactivity of the antibody with the other structural analogues of triazole compounds, indicating that the antibody had high specificity. The average recoveries from spiked samples were in the range from 80.2% to 104.7% with a relative standard deviation of 1.0-9.5%. The TRFIA results for the real samples were in good agreement with that obtained by high-performance liquid chromatography analyses. The results indicate that the established TRFIA has potential application for screening paclobutrazol in environmental samples.
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Affiliation(s)
- Zhenjiang Liu
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Xi Wei
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China; The Affiliated First People's Hospital of Jiangsu University, Zhenjiang 212002, China
| | - Kewei Ren
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Gangbing Zhu
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Zhen Zhang
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Jiagao Wang
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Daolin Du
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
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An enzyme-linked chemiluminescent immunoassay developed for detection of Butocarboxim from agricultural products based on monoclonal antibody. Food Chem 2015; 166:372-379. [DOI: 10.1016/j.foodchem.2014.06.060] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Revised: 05/06/2014] [Accepted: 06/10/2014] [Indexed: 10/25/2022]
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