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Direct Determination of Chlorpyrifos in Honey by Neutral Desorption-Extractive Electrospray Ionization Mass Spectrometry
Authors:Li-Ping Luo  Teng-Hui Yu  Xing-Xing Liu  Xue-Yong Huang  Xiao-Wei Fang  Xing-Lei Zhang
Institution:1. School of Life Sciences, Nanchang University, Nanchang, Jiangxi Province, China;2. Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China University of Technology, Nanchang, Jiangxi Province, China
Abstract:Neutral desorption-extractive electrospray ionization mass spectrometry was used for the direct, rapid, and quantitative determination of chlorpyrifos in honey without pretreatment. Under the optimized conditions, the limit of detection was 1.64?ng/mL with a linear dynamic range from 10 to 1,000?ng/mL and relative standard deviations from 1.97 to 6.14%. The recoveries of fortified honey samples at 50 and 500?ng/mL were 82.02 and 109.28% with relative standard deviations of 4.02 and 4.34%, respectively. This protocol offers high sensitivity, good precision, rapid analysis, and high specificity in a complex matrix.
Keywords:Chlorpyrifos  direct analysis  honey  mass spectrometry  neutral desorption-extractive electrospray ionization
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