Development of a fast and sensitive method for measuring multiple neonicotinoid insecticide residues in soil and the application in parks and residential areas

作者：Zhou, Ying; Lu, Xiaoxia^*; Fu, Xiaofang; Yu, Bo; Wang, Dan; Zhao, Cheng; Zhang, Qi; Tan, Ying; Wang, Xinyi

来源：Analytica Chimica Acta, 2018, 1016: 19-28.

DOI：10.1016/j.aca.2018.02.047

• Neonicotinoid insecticides
• Soil
• Pretreatment
• Liquid chromatography-tandem mass
• spectrometry
• Parks
• Residential areas

A method for simultaneous measure of nine neonicotinoid insecticide residues in soil was developed by using liquid chromatography-tandem mass spectrometry (LC-MS/MS) coupled with a quick pretreatment procedure. The soil was extracted with a mixture of acetonitrile and dichloromethane (1:2, v:v) and cleaned up with Primary Secondary Amine (PSA). Matrix-matched standards were prepared to eliminate the interference of the matrix. The LCeMS/MS conditions were optimized to separate the nine neonicotinoids within 6.7 min, and the obtained limits of detection (LODs) and limits of quantification (LOQs) ranged from 0.01 to 0.84 ng g(-1) and 0.05-2.79 ng g(-1), respectively. Recoveries of the studied neonicotinoids (except for nitenpyram) ranged from 79.41 to 100.20% with relative standard deviations (RSDs) less than 10% at spiked levels of 5 ng mL(-1), 100 ng mL(-1) and 500 ng mL(-1), and RSDs for the interday and intraday method repeatability were less than 9%. The method was applied to measure neonicotinoid residues in soil samples collected from parks (n = 35) and residential areas (n = 33) in Tianjin, China. Seven neonicotinoids were detected, with imidacloprid being the most frequently detected one, followed by acetamiprid and thiamethoxam. The total concentrations of neonicotinoids in soil ranged from 0.27 to 230.76 ng g(-1) in parks and 0.23-132.66 ng g(-1) in residential areas.

• 出版日期2018-8-3
• 单位北京大学