Multiresidue Analysis of 58 Pesticides in Bean Products by Disposable Pipet Extraction (DPX) Cleanup and Gas Chromatography鈥揗ass Spectrometry Determination

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• 作者：Ziang Li ; Yanjie Li ; Xiaochen Liu ; Xuesheng Li ; Li Zhou ; Canping Pan
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2012
• 出版时间：May 16, 2012
• 年：2012
• 卷：60
• 期：19
• 页码：4788-4798
• 全文大小：290K
• 年卷期：v.60,no.19(May 16, 2012)
• ISSN：1520-5118

文摘

A method based on disposable pipet extraction (DPX) sample cleanup and gas chromatography with mass spectrometric detection by selected ion monitoring (GC/MS-SIM) was established for 58 targeted pesticide residues in soybean, mung bean, adzuki bean and black bean. Samples were extracted with acetonitrile and concentrated (nitrogen gas flow) prior to being aspirated into DPX tubes. Cleanup procedure was achieved in a simple DPX-Qg tube. Matrix-matched calibrations were analyzed, and the limits of quantification (LOQ) of this method ranged from 0.01 mg kg^鈥? to 0.1 mg kg^鈥? for all target compounds. Coefficients of determination of the linear ranges were between 0.9919 and 0.9998. Recoveries of fortified level 0.02 mg kg^鈥? on soybean, mung bean, adzuki bean and black bean were 70.2鈥?09.6%, 69.1鈥?19.0%, 69.1鈥?19.8%, and 69.0鈥?20.8%, respectively, for all studied pesticides. Moreover, pesticide risk assessment for all the detected residues in 178 market samples at Beijing market area was conducted. A maximum 0.958% of ADI (acceptable daily intake) for NESDI (national estimated daily intake) and 55.1% of ARfD (acute reference dose) for NESTI (national estimated short-term intake) indicated low diet risk of these products.

Keywords:

multiresidue; DPX; GC/MS; beans; pesticide; analysis