UPLC-MS/MS法测定食用植物油中乙基麦芽酚含量的不确定度评定  

Uncertainty Evaluation of Determination of Ethyl Maltol in Edible Vegetable Oil by UPLC-MS/MS

作　　者：李宣 张潆元 黄永桥 LI Xuan;ZHANG Yingyuan;HUANG Yongqiao(Guizhou Testing Technology Research and Application Center,Guiyang 550014,China;Guizhou Academy of Testing and Analysis,Guiyang 550014,China)

机构地区：[1]贵州省检测技术研究应用中心,贵州贵阳550014 [2]贵州省分析测试研究院,贵州贵阳550014

出　　处：《食品安全导刊》2022年第10期89-94,共6页China Food Safety Magazine

基　　金：赫章县集中式饮用水源重金属污染特征及风险评估研究(黔科院J字[2021]41号)。

摘　　要：依据BJS 201708规定的检测方法,建立数学模型,评定超高效液相色谱-串联质谱法测定食用植物油中乙基麦芽酚含量的不确定度。通过对检测过程中各环节不确定度因素的来源进行分析并对其进行评定,计算合成不确定度。结果表明,测定过程中不确定度的来源主要是标准溶液配制和标准曲线拟合;研究测得植物油中乙基麦芽酚的含量为95.6 μg/kg,其扩展不确定度为4.3 μg/kg(k=2,95%置信区间)。研究可反映测量结果的置信度和准确性,为日常实际检测工作提供技术参考。According to the detection method specified in BJS 201708,a mathematical model was established to evaluate of the uncertainty of the determination of ethyl maltol in edible vegetable oil by ultra-high performance liquid chromatography tandem mass spectrometry.The sources of uncertainty were analyzed and evaluated,while the components of uncertainty were composed.The sources of uncertainty were comprehensively analyzed and calculated.The results show that the main sources of uncertainty in the determination process are the preparation of standard solution and the fitting of standard curve.The content of ethyl maltol in vegetable oil was 95.6 μg/kg,and the expanded uncertainty is 4.3 μg/kg (k=2,95% confidence interval).This method accurately reflects the confidence and accuracy of the measurement,which can provide technical references for the daily actual inspection work.

关 键 词：超高效液相色谱-串联质谱法 食用植物油 乙基麦芽酚 不确定度 

分 类 号：O657.63[理学—分析化学] TS225.1[理学—化学]