摘要
对石墨炉原子吸收光谱法测定小麦粉中镉含量的不确定度进行评定,分析了整个测试过程中不确定度的来源,并对各不确定度分量进行了计算。计算结果显示小麦粉中镉含量为0.44mg/kg,扩展不确定度为0.022mg/kg(k=2)。各不确定度分量计算结果显示,石墨炉原子吸收光谱法测定小麦粉中镉含量的不确定度主要来自标准工作曲线拟合产生的不确定度,其次是重复性实验不确定度。
The uncertainty of measurement in determination of the cadmium content of wheat flour with the graphite furnace atomic absorption spectrometry were analyzed in this paper, and the sources of the uncertainty of measurement were analyzed, the uncertainty components were calculated. The results showed that the content of cadmium in wheat flour is 0.44mg/kg and the expanded uncertainty is 0.022mg/kg（k=2）. The results of the uncertainty components showed that the uncertainty of measurement in determination of the cadmium content in wheat flour mainly from the standard working curve, followed by the uncertainty of repetitive experiments.
出处
《食品与发酵科技》
CAS
2016年第1期96-100,共5页
Food and Fermentation Science & Technology
基金
广东联合基金重点项目"珠江口环境激素类污染物的生态化学行为与毒理效应研究"(U1133003)
广东省省部产学研重点项目:广东省大田山
李坑生活垃圾填埋场水质监测
国家自然科学基金项目"溶藻细菌及其胞外活性物质对球形棕囊藻的溶藻机制研究"(41076068)
关键词
石墨炉原子吸收法
镉
不确定度
来源
graphite furnace atomic absorption spectrometry
cadmium
uncertainty
source
