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Immunoassay for Highly Water-Soluble Nitenpyram: Evaluating the Analytical Performance of an Easy-to-Use Screening Method for Agricultural Samples
Analytical Letters ( IF 1.6 ) Pub Date : 2019-07-19 , DOI: 10.1080/00032719.2019.1642343 Eiki Watanabe 1 , Yuki Hirakawa 2, 3 , Tomomi Yamasaki 2, 3 , Seiji Iwasa 4 , Shiro Miyake 2, 5
Analytical Letters ( IF 1.6 ) Pub Date : 2019-07-19 , DOI: 10.1080/00032719.2019.1642343 Eiki Watanabe 1 , Yuki Hirakawa 2, 3 , Tomomi Yamasaki 2, 3 , Seiji Iwasa 4 , Shiro Miyake 2, 5
Affiliation
Abstract Nitenpyram, a neonicotinoid insecticide, is highly soluble in water (>5.9 × 105 mg/L). Specifically examining its physicochemical properties, we have established a simple and rapid residue analytical method for nitenpyram using an enzyme-linked immunosorbent assay (ELISA) which requires no organic solvents. The I50 value found with this ELISA method using a selective monoclonal antibody toward nitenpyram was 4.8 ng/mL. A hand-shaking method using water was applied for ELISA analysis to extract nitenpyram from fruiting vegetable samples of four kinds. Matrix effects caused by interfering substances coexisting in aqueous sample extracts were reduced by dilution with water. No problems were found in the analytical values obtained using ELISA. From analyses of nitenpyram-incurred fruiting vegetables with the proposed ELISA and the reference HPLC protocols, high mutual correlation was found, which suggests that the measurement accuracy of the proposed ELISA method is comparable to the reference HPLC procedure.
更新日期：2019-07-19
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