Min Huang, Bangyan Song, Yangxin Chen, Piao Huang, Ya Yang, Ping Lu
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Untargeted screening of pesticide residues in coix seed by LC-MS/MS and dietary risk assessment.
Coix seed (C. lacryma-jobi L.) is used as a medicinal and edible grain in China. In this study, nontargeted screening of pesticide residues in 126 coix seed samples was conducted in Guizhou Province, southwestern China. The 39 pesticides screened were detected and quantified using a liquid chromatography-tandem mass spectrometry method after modified QuEChERS pretreatment. The samples were extracted with an acetonitrile-formic acid (98:2;v/v) mixture. Method linearity was confirmed between 0.001-1 mg kg-1, with significant correlation coefficients (R2 >0.980). Mean recoveries were 72.2%-115% and the limit of quantification was 0.01 mg kg-1. Intraday repeatability and inter-day reproducibility ranged from 0.2% to 17.8% and 0.3% to 18.0%, respectively. Risk assessment showed that Hazard Quotient (HQ) and Hazard Index (HI) were well below 1. This method can help to regulate pesticide use in cultivation areas and improve the quality and safety of coix seed products.
期刊介绍：
Food Additives & Contaminants: Part B publishes surveillance data indicating the presence and levels of occurrence of designated food additives, residues and contaminants in foods, food supplements and animal feed. Data using validated methods must meet stipulated quality standards to be acceptable and must be presented in a prescribed format for subsequent data-handling.
Food Additives & Contaminants: Part B restricts its scope to include certain classes of food additives, residues and contaminants. This is based on a goal of covering those areas where there is a need to record surveillance data for the purposes of exposure and risk assessment.
The scope is initially restricted to:
Additives - food colours, artificial sweeteners, and preservatives;
Residues – veterinary drug and pesticide residues;
Contaminants – metals, mycotoxins, phycotoxins, plant toxins, nitrate/nitrite, PCDDs/PCFDs, PCBs, PAHs, acrylamide, 3-MPCD and contaminants derived from food packaging.
Readership: The readership includes scientists involved in all aspects of food safety and quality and particularly those involved in monitoring human exposure to chemicals from the diet.
Papers reporting surveillance data in areas other than the above should be submitted to Part A . The scope of Part B will be expanded from time-to-time to ensure inclusion of new areas of concern.
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