龚小丽

（大闽食品（漳州）有限公司，福建 漳州 363005；吉克检测技术（福建）有限公司，福建 漳州 363005）

摘要：采用气相色谱-串联质谱法测定茶叶中毒死蜱的含量，对测定结果不确定度进行评定。根据检测方法及数学模型，分析整个检测过程中的不确定度，对测量结果的不确定度进行评定。影响测量结果的不确定度主要来源于：样品测定中的标准工作曲线拟合和样品制备中的前处理（即回收率），茶叶样品中毒死蜱含量表示为：（0.0960±0.0172）mg/kg。该方法准确度高，适用于茶叶中毒死蜱含量的检测，为科学判定检测结果提供参考。

关键词：气相色谱-串联质谱法；茶叶；毒死蜱；不确定度

Uncertainty Evaluation of Determination ofChlorpyrifos-ethyl in Tea by Gas chromatography Tandem Mass Spectrometry

GONG Xiao-li

（ Damin Foodstuff（Zhangzhou）Co.，Ltd.，Zhangzhou 363005，China；JiKe Testing Technology（Fujian）Co.，Ltd.，Zhangzhou 363005，China）

Abstract: Gas chromatography tandem mass spectrometry（GC-MS/MS）was used to determine the chlorpyrifos-ethylin tea and the uncertainty of the determination results was evaluated. According to the detection method andmathematical model， the uncertainty of the whole detection process is analyzed， and the uncertainty of themeasurement results is evaluated.The uncertainty of measurement results mainly comes from the working curve fittingin sample determination and pretreatment in sample preparation （i.e. recovery）.The measurement results of thechlorpyrifos- ethyl in tea samples was expressed as：（0.0960 ± 0.0172）mg/kg.The method has high accuracy and issuitable for the determination of Chlorpyrifos-ethyl in tea，which can provide a reference for scientific determinationof detection results.

Key words: gas chromatography tandem msss spectrometry；tea；chlorpyrifos-ethyl；uncertainty

中图分类号：TS207       文献标志码：A       文章编号：1007-7871（2022）06-0010-05

2022，Vol.25，No.6