Details

Autor(en) / Beteiligte

• OKAZAKI, Fumiko
• HIRAKAWA, Yuki
• YAMAGUCHI-MURAKAMI, Yukie
• HARADA, Ayako
• WATANABE, Eiki
• IWASA, Seiji
• NARITA, Hiroshi
• MIYAKE, Shiro

Titel

Development of Direct Competitive ELISA for Residue Analysis of Fungicide Chlorothalonil in Vegetables

Ist Teil von

• Food Hygiene and Safety Science (Shokuhin Eiseigaku Zasshi), 2014/04/25, Vol.55(2), pp.65-72

Ort / Verlag

Japan: Japanese Society for Food Hygiene and Safety

Erscheinungsjahr

2014

Quelle

MEDLINE

Beschreibungen/Notizen

• A direct competitive (dc)-ELISA was developed for rapid and simple determination of chlorothalonil residue in vegetables. A carboxylic acid derivative of pentachlorophenol was used to prepare an anti-chlorothalonil monoclonal antibody (MoAb) that showed adequate reactivity for dc-ELISA. Before homogenization of vegetable samples, phosphoric acid was added (vegetable–10% phosphoric acid (2 : 1, w/v)) to block enzymatic decomposition of chlorothalonil. The use of phosphate buffer (100 mmol/L, pH 7.0) minimized the influence of phosphoric acid on competitive reaction in the dc-ELISA. Working range was 0.10 to 6.0 ng/mL in the optimized dc-ELISA. The recovery of chlorothalonil spiked in cucumber and eggplant was 97.1 to 125%. The results correlated well with those obtained by HPLC analysis. The dc-ELISA could rapidly determine chlorothalonil after a simple sample preparation procedure.