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目的研究原子吸收法测定饮用水中锰含量的不确定度评定方法,为饮用水的锰的测定提供参考依据。方法根据JJF1059-1999《测量不确定度评定与表示》对饮用水中锰的火焰原子吸收法测量不确定度进行分析评定。结果用该法测定饮用水中锰含量为1.11 mg/L时,其相对不确定度是0.032,扩展不确定度为0.036 mg/L(K=2),不确定度最主要来源是在绘制工作曲线中产生的。结论该方法对评价用原子吸收测定饮用水中锰的不确定度有一定的参考价值。
Objective To study the method of assessing the uncertainty of the manganese content in drinking water by atomic absorption spectrometry and to provide a reference for the determination of manganese in drinking water. Methods According to JJF1059-1999 “Evaluation and Expression of Uncertainty in Measurement”, the uncertainty of measurement of manganese in drinking water by flame atomic absorption spectrometry was evaluated. Results When this method was used to determine the content of manganese in drinking water was 1.11 mg / L, the relative uncertainty was 0.032 and the uncertainty of expansion was 0.036 mg / L (K = 2). The main source of uncertainty was in the drawing work Generated in the curve Conclusion This method has certain reference value for the evaluation of the uncertainty of determination of manganese in drinking water by atomic absorption spectrometry.