火焰原子吸收分光光度法测定饮用水中铁和锰的不确定度评定

Uncertainty Evaluation of Determined Iron and Manganese in Drinking Water by Flame Atomic Absorption Spectrophotometry

分析了测试过程中不确定度影响因素,其主要来源为标准溶液、标准曲线拟合、样品重复测定、分光光度计4部分。本次测量结果为:铁(0.232±0.012)mg/L;锰(0.092±0.004)mg/L,k=2(约95%置信水平)。

The paper analyzed influencing factors of uncertainty in the testing process, its main source was the standard solution, standard curve fitting, the samples repeated measurements and spectrophotometer. The measurement results were： iron （0.232 ± 0.012）mg/L; manganese （0.092 ± 0.004）mg/L, k = 2（Approximately 95% confidence level）.