氢化物原子荧光法测定生活饮用水中砷的不确定度评定  

Evaluation of Uncertainty for the Determination of Arsenic in Drinking Water by Hydride Atomic Fluorescence Spectrometry

作　　者：魏强 WEI Qiang(Fujian Tuopu Detection Technology Co.,Ltd.,Fuzhou 350108,China)

机构地区：[1]福建拓普检测技术有限公司,福建福州350108

出　　处：《食品安全导刊》2024年第31期124-127,共4页China Food Safety Magazine

摘　　要：依据相关技术规程,建立氢化物原子荧光法测定生活饮用水中砷含量的不确定度评定方法。从标准溶液、标准溶液配制、测量重复性、标准曲线拟合等方面分析和计算不确定度分量,对各分量进行合成和扩展,得出测量不确定度评定结果。结果表明,生活饮用水中砷含量测定结果为(2.432±0.210)μg·L^(-1)(k=2);影响测量结果的主要因素是标准曲线拟合。According to relevant technical regulations,the uncertainty evaluation method for the determination of arsenic content in drinking water by hydride atomic fluorescence method is established.The uncertainty components is analyzed and calculated from the aspects of standard solution,standard solution preparation,measurement repeatability,and standard curve fitting.The evaluation result of measurement uncertainty is obtained by synthesizing and expanding each component.The results show that the content of arsenic in drinking water is(2.432±0.210)μg·L^(-1)(k=2);the main factor affecting the measurement results is the fitting of the standard curve.

关 键 词：生活饮用水 原子荧光法 不确定度 曲线拟合 砷含量 

分 类 号：TU991.21[建筑科学—市政工程] O657.3[理学—分析化学]