原子荧光光谱法测定大米中总汞含量的不确定度评价  

Evaluation of Uncertainty of Determination of Total Mercury in Rice by Atomic Flfluorescence Spectrometry

作　　者：王秀丽 张梅超 王妙 王妍 徐毅 WANG Xiuli;ZHANG Meichao;WANG Miao;WANG Yan;XU Yi(Weihai Institute for Food and Drug Control,Weihai 264200,China)

机构地区：[1]威海市食品药品检验检测研究院,山东威海264200

出　　处：《食品安全导刊》2023年第25期86-89,共4页China Food Safety Magazine

摘　　要：目的:评定原子荧光法测定大米中汞的不确定度。方法:依据《食品安全国家标准食品中总汞及有机汞的测定》(GB 5009.17—2021)以及《测量不确定度评定与表示》(JJF 1059.1—2012),建立原子荧光谱法测定大米中总汞的不确定度测量模型,并对整个测定过程中的不确定度来源进行分析。结果:汞含量结果为(4.21±0.13)mg·kg^(-1)。结论:标准溶液配制、前处理方法及测量重复性依次是测定过程中主要的不确定度来源。Objective:To evaluate the uncertainty of determination of mercury in rice by atomic fluorescence method.Method:According to GB 5009.17—2021 and JJF 1059.1—2012,the uncertainty measurement model of determination of total mercury in rice by atomic fluorescence spectrometry was established,and the source of uncertainty in the whole process was analyzed.Result:Mercury content was(4.21±0.13)mg·kg^(-1).Conclusion:Preparation of standard solution,pretreatment method and measurement repeatability are the main sources of uncertainty in the determination process.

关 键 词：原子荧光法 总汞 测量不确定度 

分 类 号：O657.31[理学—分析化学] TS210.7[理学—化学]