An Indirect Enzyme-Linked Immunosorbent Assay for Determination of New Herbicide H-9201 in Water
文献类型: 外文期刊
第一作者: Zhang Cun-Zheng
作者: Zhang Cun-Zheng;Liu Xian-Jin;Yu Jie;Zhang Cun-Zheng;Liu Xian-Jin;Yu Jie;Yang Chun-Long;Chen Min
作者机构:
关键词: Herbicide;H-9201;Enzyme-linked immunosorbent assay;Polyclonal antibody
期刊名称:CHINESE JOURNAL OF ANALYTICAL CHEMISTRY ( 影响因子:1.134; 五年影响因子:0.909 )
ISSN: 0253-3820
年卷期: 2011 年 39 卷 2 期
页码:
收录情况: SCI
摘要: A sensitive indirect enzyme-linked immunosorbent assay (ELISA) was developed for the detection of new herbicide H-9201, and their suitability for the determination of this analyte in environmental water was studied. Starting with phosphorus thiochloride and methanol, an analogs with similar structure of hapten was synthesized, and carboxyl group was conducted by succinic anhydride, then the derivative was conjugated with bovine serum albumin or ovalbumin by means of active ester as immunoagent and coating agent, respectively; IC-ELISA method was developed based on the polyclonal antibody generated in rabbits by immunizing with synthesized hapten. For standard, 50% reduction of the maximum ELISA signal (IC50) was 1. 331 mg/L, whereas the detection limit was 0. 017 mg/L in the competitive standard curve ranged from 0. 05 to 20. 0 mg/L and the combination of the concentrations of coating solution and primary antibody was optimized to 1/512 and 1/18000, respectively. No significant cross-reactivity for related compounds was observed, such as 2,4-dimethyl-6-nitrophenol, p-nitrophenol, Methamidophos, phorate, chlorpyrifos, parathion, the antibody showed negligible cross-reactivity with S-carboxylethyl-O, O-Dimethyl-phosphorodithioate, dimethoate, malathion, but high cross-reactivity with analogs of hapten. Recovery of H-9201 in environmental water was (80.5 +/- 4. 5)%-(95. 2 +/- 3. 2)% based on the developed IC-ELISA method.
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