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目的对水中PH值测定的不确定度进行评定。方法根据JJF 1059.1-2012测量不确定度的评定与表示和GB/T 5750-2006生活饮用水PH值测定方法建立数学模型,分析不确定度来源,量化不确定度分量,评定了合成不确定度。结果不确定度评定结果为PH=4.08±0.03,k=2。结论该不确定度评定对实际工作具有一定的指导意义。
Objective To assess the uncertainty of determination of PH value in water. Methods According to JJF 1059.1-2012 evaluation and expression of measurement uncertainty and GB / T 5750-2006 drinking water PH value determination method to establish a mathematical model, the source of uncertainty, quantify the uncertainty component, assessed the synthesis of uncertainty . The results of the evaluation of the uncertainty of the results for the PH = 4.08 ± 0.03, k = 2. Conclusion The evaluation of uncertainty has some guiding significance for practical work.