Effect of hapten structures on specific and sensitive enzyme-linked immunosorbent assays for N-methylcarbamate insecticide metolcarb

文献类型: 外文期刊

第一作者: Zhang, Qi

作者: Zhang, Qi;Wu, Yunru;Wang, Limin;Hu, Baishi;Liu, Fengquan;Zhang, Qi;Li, Peiwu

作者机构:

关键词: Hapten;Polyclonal antibody;Enzyme-linked immunosorbent;assay;N-Methylcarbamate insecticide;Metolcarb

期刊名称:ANALYTICA CHIMICA ACTA ( 影响因子:6.558; 五年影响因子:6.228 )

ISSN:

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收录情况: SCI

摘要: Five different haptens of the N-methylcarbamate insecticide metolcarb were designed and synthesized. All of the haptens were conjugated with ovalbumin (OVA) for the coating antigen, and one hapten containing all of the structure of metolcarb was conjugated with bovine serum albumin (BSA) for the immunogen. Two polyclonal antisera were raised against the BSA conjugate, and ten antibody/coating conjugate combinations were selected for studies of assay sensitivity and specificity for metolcarb. A class-specific combination was found, with the I50 of the assay ranged from 0.64 to 20.98 μg mL~(-1) for seven tested N-methylcarbamate insecticides except for pirimicarb. Considering titer, I_(50) and cross-reactivity of all combinations of antibody/coating conjugate, a competitive indirect enzyme-linked immunosorbent assay (ELISA) in a homologous system, whose limit of detection (LoD) reached 1.4 ng mL~(-1), was presented. The results of competitive ELISAs indicated that coating hapten structure can significantly affect not only assay sensitivity but also its specificity.

分类号: O65

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