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目的对生活饮用水用聚氯化铝氧化铝含量测量不确定度进行评定,为建立有效的质量控制方法提供依据。方法依据JJF 1059-2012建立数学模型,通过对实验过程不确定度因素的分析,合成不确定度。结果固体聚氯化铝样品中氧化铝的质量分数w=(31.2±0.4)%。结论生活饮用水用聚氯化铝氧化铝含量的测量过程中滴定部分产生的不确定度分量是其测量不确定度的主要来源。
OBJECTIVE To evaluate the measurement uncertainty of poly aluminum chloride content in domestic drinking water and provide the basis for establishing effective quality control method. Methods The mathematical model was established according to JJF 1059-2012. The uncertainty of the experimental process was analyzed to synthesize the uncertainty. Results The mass fraction of alumina in solid polyaluminum chloride samples was w = (31.2 ± 0.4)%. Conclusion The uncertainty component of the titration of the polyaluminum chloride content in drinking water is the main source of measurement uncertainty.