茶叶中的甲氰菊酯、噻嗪酮含量的测定能力验证研究

Study on the proficiency testing of determination of fenpropathrin and buprofezin content in tea

中文关键词:  茶叶  甲氰菊酯  噻嗪酮  能力验证

英文关键词:tea  fenpropathrin  buprofezin  proficiency testing

中文摘要:

      目的 通过参加CNCA-20-01“茶叶中的甲氰菊酯、噻嗪酮含量的测定”能力验证, 提高实验室对茶叶中的甲氰菊酯、噻嗪酮的检测能力。方法 样品经乙腈提取后净化, 分别采用气相色谱法(gas chromatography, CC)和气相色谱串联质谱法(gas chromatography-tandem mass spectrometry, GC-MS/MS)进行检测比对, 并通过多种质量控制措施对测定结果进行验证。结果 CNCA-20-01样品中甲氰菊酯和噻嗪酮的测定结果分别为16.927 mg/kg和21.349 mg/kg; Z值分别为-0.45、-0.94, |Z|均小于2。结论 实验检测能力评价结果为满意, 表明本实验室对于茶叶中甲氰菊酯、噻嗪酮含量的定量测定能力较好。

英文摘要:

      Objective To improve the laboratory's ability to determinate fenpropathrin and buprofezin in tea by participating in the capability verification of CNCA-20-01 Determination of fenpropathrin and buprofezin in tea. Methods The samples were extracted with acetonitrile and purified. The gas chromatography and gas chromatography-tandem mass spectrometry were used for detection comparison, and the determination results were verified by multiple quality control measures. Results The assay results for fenpropathrin and buprofezin in CNCA-20-01 were 16.927 mg/kg and 21.349 mg/kg, respectively. Z values were -0.45 and -0.94, respectively, |Z| was less than 2. Conclusion The evaluation result of experimental detection ability is satisfactory, which indicates that our laboratory has good quantitative determination ability for fenpropathrin and buprofezin in tea.