气相色谱法测定茶叶中γ-666残留量的不确定度评定  

Uncertainty evaluation for the determination of γ-666 residues in teas by capillary gas chromatography

作　　者：宋家玉[1] 焦燕妮[1] 刘文杰[1] 周宇 陈金东[1] Song Jiayu;Jiao Yanni;Liu Wenjie;Zhou Yu;Chen Jindong(Shandong Center for Disease Control and Prevention,Jinan 250014,China;Kashi Center for Disease Control and Prevention,Kashi 844000,China)

机构地区：[1]山东省疾病预防控制中心,济南250014 [2]新疆喀什疾病预防控制中心,新疆喀什844000

出　　处：《化学分析计量》2021年第6期85-88,共4页Chemical Analysis And Meterage

摘　　要：采用气相色谱法测定茶叶中γ-666残留量,根据JF1059.1—2012《测量不确定度评定与表示》建立了数学模型,对毛细管柱色谱法测定茶叶中γ-666残留量的不确定度进行评定。不确定度主要来源于标准工作曲线绘制、标准溶液配制、样品处理、仪器进样和测量重复性。当茶叶中γ-666的残留量为0.034 mg/kg时,其扩展不确定度为0.003 mg/kg(k=2)。该方法确定了影响毛细管柱色谱法测定茶叶中六六六残留量的关键因素,提高了检测方法准确性和可靠性。The determination of γ-666 residues in teas by gas chromatography was carried out.According to JF1059.1-2012 Evaluation and Expression of Measurement Uncertainty,a mathematical model was established to evaluate the uncertainty of determination of γ-666 residues in teas by capillary column chromatography.The uncertainty mainly comes from standard working curve drawing,standard solution preparation,sample handling,instrument injection and measurement repeatability.When the pesticide residues(γ-666)in teas was 0.034 mg/kg,the expanded uncertainty was 0.003 mg/kg(k=2).The key factors affecting the determination of γ-666 residue in teas by capillary column chromatography were determined,and the accuracy and reliability of the method were improved.

关 键 词：毛细管气相色谱法 茶叶 γ-666 不确定度 

分 类 号：O657.3[理学—分析化学]