河北工业科技2017，Vol.34Issue(2)：116-119,4.DOI:10.7535/hbgykj.2017yx02007
原子吸收石墨炉法测定圆白菜中铬含量结果的不确定度评定
Evaluation of uncertainty for determination of Cr content in cabbage by graphite furnace atomic absorption spectrometry
王玉辉 1康菁 2王涛 1赵灵春1
作者信息
- 1. 神华包头煤化工有限责任公司,内蒙古包头 014010
- 2. 包头出入境检验检疫局,内蒙古包头 014010
- 折叠
摘要
Abstract
In order to evaluate the uncertainty of determination of Cr content in cabbage samples by graphite furnace atomic absorption spectrometry,according to the JJF 1059-1999 Chinese Regulation on the Valuation and Expression of Uncertainty in Measurement,the sources of uncertainty in determination of Cr content in cabbage samples are analyzed.Furthermore,the combined uncertainties and expanded uncertainties are calculated based on the established mathematic models of evaluation uncertainty.The result shows that the Cr content in cabbage samples in this study is (1.50±0.24) mg/kg (k=2),and the main sources of uncertainty in the determination are as follows:repeatability of measurement,Cr content in cabbage samples,the quality of the samples,Cr content in reagent blank and the constant volume.This method accurately reflects the confidence and accuracy of the measurement,and provides reference for the daily actual inspection work.关键词
化学分析/原子吸收光谱法/石墨炉/圆白菜/铬含量/不确定度Key words
chemical analysis/atomic absorption spectrometry/graphite furnace/cabbage/chromium content/uncertainty分类
化学化工引用本文复制引用
王玉辉,康菁,王涛,赵灵春..原子吸收石墨炉法测定圆白菜中铬含量结果的不确定度评定[J].河北工业科技,2017,34(2):116-119,4.
