普通白菜(上海青)中农药残留检测技术盲样考核结果与分析

Results and analysis of blind sample assessment for pesticide residues in ordinary cabbage(Shanghai Qing)

目的通过"2018年广东省食品承检机构农药残留检测技术盲样考核"项目,检验本实验室的农药残留检测的能力,提高实验室在农药检测技术方面的竞争力。方法根据《2018广东省食品承检机构农药残留检测技术盲样考核作业指导书》的说明进行前处理。将一份空白基质对照样和3份平行盲样分别提取,按照NY/T 761-2008、GB 23200.8-2016、GB/T 20769-2008方法定量吸取样品提取液进行相应的净化处理,随后根据相应的仪器进行定性定量检测分析。结果本次盲样考核必考项目42种定性定量农药组分中,35种组分未检出,检出并定量的组分7种。选考项目6种定性农药组分中,5种组分定性未检出,1种组分定性检出。本实验室在96 h内上报结果,组织机构首次判定结果为合格。结论本次盲样考核项目多,方法复杂且时间紧迫,参加本次考核提高了实验室检测农药残留的技术水平及实验室竞争力。

Objective To test the ability of the laboratory in pesticide residue detection,and to improve the competitiveness of the laboratory in pesticide detection technology,through the project of"blind sample assessment of pesticide residue detection technology of Guangdong food inspection agency in 2018".Methods According to the instructions of"2018 Guangdong province food inspection institutions pesticide residue detection technology blind sample assessment work instruction",pre-treatment was conducted.One blank matrix and three parallel blind samples were extracted,respectively.The sample extract was extracted quantitatively according to NY/T 761-2008,GB 23200.8-2016 and GB/T 20769-2008 methods for corresponding purification treatment,followed by qualitative and quantitative detection and analysis according to the corresponding instruments.Results In this blind sample exam,there were 42 qualitative and quantitative pesticides in the course of the test,and 35 of the ingredients were undetectable,and there were 7 ingredients to be tested and quantified.Of the 6 qualitative pesticide components,5 were not detected qualitatively and 1 was detected qualitatively.The laboratory reported the results within 96 hours,and the organization judged the results as qualified for the first time.Conclusion This blind sample assessment has many items,complicated methods and short time.This assessment has improved the technical level of laboratory detection of pesticide residues and laboratory competitiveness.