摘要
对液相色谱-原子荧光联用法测定粮食中无机砷含量进行不确定度评定,为建立有效的质量控制方法提供参考。依据不确定度评定原理,建立不确定度评定数学模型,对各不确定度分量的来源进行分析、量化和合成,并对测量结果的不确定度进行评定和表述。结果表明:影响测量结果不确定度的主要因素为最小二乘法标准曲线拟合、样品回收率。无机砷含量测试结果表述为(0.185±0.017)mg/kg。
The uncertainty evaluation in the determination of inorganic arsenic in grain by liquid chromatography-atomic fluorescence spectrometry were evaluated to provide useful reference for establishing effective quality control methods. Based on the principle of uncertainty evaluation,the mathematical model of uncertainty was established and the source of each uncertainty component was analyzed,quantified and synthesized,and the uncertainty of measuring result was evaluated and described. The results showed that the main factors influencing the uncertainty included standard curve fitting of the least square method,and sample recovery rates. The inorganic arsenic content of the experimental determination result was（ 0. 185 ± 0. 017） mg/kg.
作者
刘付英
邵志凌
李彩霞
LIU Fu - ying;SHAO Zhi - ling;LI Cai-xia(Yunnan Grain and Oil Science Research Institute,Kunming Yunnan 650033;College of Chemistry Biology and Environment,Yuxi normal university,Yuxi Yunnan 653100)
出处
《粮油食品科技》
2018年第4期45-49,共5页
Science and Technology of Cereals,Oils and Foods
基金
云南省科技厅青年项目(2016FD113)
关键词
液相色谱-原子荧光联用法
粮食
无机砷
不确定度
liquid chromatography - atomic fluorescence spectromett-y
grain
inorganic arsenic
uncertainty
作者简介
刘付英，1981年出生，女，硕士，工程师．;通讯作者：李彩霞，1980年出生，女，博士，讲师．
