论文部分内容阅读
目的建立氢化物-原子荧光光谱法测定生活饮用水中砷含量不确定度的分析方法,找出其主要影响因素。方法建立不确定度的数学模型,系统分析计算不确定度的各个分量。结果按GB/T 5750-2006(6.1)氢化物-原子荧光光谱法测定生活饮用水中的砷,当结果为1.10μg/L时,其扩展不确定度为0.08μg/L(k=2)。结论测量中标准曲线拟合和样品重复测量引入的不确定度相对较大,是该方法影响测量结果不确定度的关键。
OBJECTIVE To establish an analytical method for the determination of arsenic in drinking water by hydride generation - atomic fluorescence spectrometry and find out the main influencing factors. Methods The mathematical model of uncertainty is established, and the components of the uncertainty are systematically analyzed and calculated. Results The determination of arsenic in drinking water according to GB / T 5750-2006 (6.1) by hydride generation - atomic fluorescence spectrometry showed that the expanded uncertainty was 0.08 μg / L (k = 2) when the result was 1.10 μg / . Conclusion The uncertainty introduced by the standard curve fitting and repeated sample measurement in measurement is relatively large, which is the key factor that the method affects the uncertainty of measurement results.