微波消解-ICP-MS测定能力验证样品中镉含量的不确定度评定  

The evaluation of uncertainty in determination of cadmium content in samples by microwave digestion-ICP-MS

作　　者：韩伟立[1] 沈梅[1] 陈凌云[1] 马安德 HAN Wei-li SHEN Mei CHEN Ling-yun MA An-de(Department of Health inspection and quarantine, School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou 510515)

机构地区：[1]南方医科大学公共卫生学院卫生检测中心,广东省热带病研究重点实验室,广州510515

出　　处：《中国食品添加剂》2016年第12期200-204,共5页China Food Additives

基　　金：国家自然科学基金(81673041)

摘　　要：采用微波消解-电感耦合等离子体质谱法(ICP-MS),建立实验过程的数学模型,对由北京中实国金实验室能力验证研究中心提供的能力验证项目中的大米粉(NTL PT-0483)进行镉含量的测定,并对实验过程中引入的不确定度进行分析,计算其分量、合成标准不确定度以及扩展不确定度。The evaluation of measurement uncertainty is an important parameter when assessing the sources of analytical data variability. The aim of this present research work is to find out the influencing factors of uncertainty in the procedure of Cadmium determination in rice by inductively coupled plasma-mass spectrometry（ICP-MS）microwave digestion assisted. The major uncertainty was attributed to six sources such as repeatability of measurement,standard solution preparation,sample determination using calibration curve,reagent blank. Each source was quantified in detail. Finally,combined standard uncertainty as well as expanded uncertainty was calculated.

关 键 词：ICP-MS 不确定度 能力验证样品 镉 

分 类 号：TS207.3[轻工技术与工程—食品科学] TS207.5[轻工技术与工程—食品科学与工程]