文献类型：期刊文献

英文题名：Determination of nine organophosphorus pesticide residues in corn by capillary electrophoresis with solid phase extraction

作者：Gu, Chunxiu[1];Liu, Baining[1];Zhou, Kaowen[1]

第一作者：谷春秀

通讯作者：Liu, BN[1];Zhou, KW[1]

机构：[1]Beijing Union Univ, Biochem Engn Coll, Beijing 100023, Peoples R China

第一机构：北京联合大学生物化学工程学院

通讯机构：[1]corresponding author), Beijing Union Univ, Biochem Engn Coll, Beijing 100023, Peoples R China.|[1141726]北京联合大学生物化学工程学院;[11417]北京联合大学;

年份：2024

卷号：19

期号：11

外文期刊名：INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE

收录：;Scopus(收录号：2-s2.0-85206666825);WOS:【SCI-EXPANDED(收录号:WOS:001340977800001)】；

语种：英文

外文关键词：Organophosphorus; Corn; Solid phase extraction; Capillary electrophoresis

摘要：A practical method was developed for simultaneously determining phorate, coumaphos, chlorpyrifos, profenofos, dichlorvos, terbufos, dimethoate, parathion and isocarbophos residues in corn samples by solid phase extraction (SPE) and capillary electrophoresis (CE). During the SPE, the effects of ionic strength, pH, extraction temperature and time were studied to evaluate the extraction efficiency of nine organophosphorus. Perform headspace SPE in 10 ml solution, and optimized parameters as follows: NaCl dosage 1.5 g, solution pH 5.5, extraction temperature 50 degrees C and extraction time 35 min. During the CE process, the effects of separation conditions such as pH value, ionic strength, additional additives, and separation voltage on the separation efficiency of nine organophosphorus were studied. The optimized CE conditions are as follows: the separation solution is a phosphate buffer solution with pH 7.0, containing 45 mmol/L NaCl and 25 mmol/L pyrrolidone, and the separation voltage is 17 kV. All nine organophosphorus showed good linear relationships. Their detection limits were 0.5-0.7 mu g/kg. Their quantitation limits were 1.0-1.2 mu g/kg. The recoveries were 85.2 % - 113.3 %. The method can be used to determine organophosphorus pesticide residues in corn samples rapidly.