茶叶中联苯菊酯、毒死蜱的测定能力验证结果与分析

Proficiency testing results and analysis of determination of bifenthrin and chlorpyrifos in tea

中文关键词:  茶叶  联苯菊酯  毒死蜱  能力验证  Z值

英文关键词:tea  bifenthrin  chlorpyrifos  proficiency testing  Z score

中文摘要:

      目的 通过参加能力验证实验, 提高实验室农药残留检测的能力。方法 优先选择本实验室常用方法, 依据NY/T 761-2008、GB/T 23204-2008、GB 23200.13-2016方法, 对样品进行相应的提取净化处理, 随后根据相应的仪器进行定性定量检测分析, 使用仪器比对、方法比对、人员比对、加标回收、质控样品作为质控方法。结果 本次能力验证以NY/T 761-2008报出检验结果。样品编号为18-U804检测结果为联苯菊酯: 0.214 mg/kg, Z比分数为?0.4, 毒死蜱为未检出; 样品编号为18-Y023检测结果为联苯菊酯为0.582 mg/kg, Z比分数为?0.3, 毒死蜱为0.364 mg/kg, Z比分数为?0.6, 组织机构判定结果为满意。结论 本次能力验证结果为满意, 说明本实验室对农药残留的检测能力较好。

英文摘要:

      Objective To ensure and improve the laboratory’s ability to determinate pesticide residues by participating in competency verification experiment. Methods The samples were extracted and purified according to NY/T 761-2008,GB/T 23204-2008 and GB 23200.13-2016 methods, which were common methods in our laboratory. Qualitative and quantitative testing and analysis were carried out according to the corresponding instruments, using instrument comparison, method comparison, personnel comparison, recycling and quality control samples as quality control methods. Results The test results were reported in NY/T 761-2008 for this capability verification. 18-U804 test result for bifenthrin was 0.214 mg/kg, Z score for ?0.4, chlorpyrifos did not check out, 18-Y023 test result for bifenthrin was 0.582 mg/kg, Z score for?0.3, and chlorpyrifos was 0.364 mg/kg, Z score for 0.6. The organization judged the result was satisfactory. Conclusion The result of this ability verification is satisfactory, which indicates that our laboratory has a good ability to detect pesticide residues.