饮用水中PH测量结果的不确定度评定
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摘要：目的：为减少实验误差，提高检测结果精确度，评定饮用水中PH测量结果的不确定度。方法：分析饮用水中PH测量结果的不确定度的来源，通过计算得出该法测定饮用水中PH测量结果的扩展不确定度。结果：不确定度评定结果为PH= 7.68±0.03，p=95%,适合于每个水样的检测结果。结论：该方法操作简便，适合于每个水样的检测结果，可参考用于水中检测参数的不确定度评定。
关键词：生活饮用水；PH复合电极；不确定度
Abstract: Objective: To evaluate the uncertainty of measuring PH in drinking water.This study was to decrease experimental error and increase the accuracy of results. Methods: The source of Measurement uncertainty of the PH in water was analyzed and assessment on uncertainty of PH determination in water was calculated. Results: The result showed that the expanded uncertainty was PH=7.68±0.03，p=95% and the method was fit for the same kind of the samples. Conclusion: The method was easy and fit for various samples and the method was for reference to assessment on uncertainty of others parameters determination in water.
Key words:drinking water；electrode assembly pH；uncertainty
【中图分类号】R123.1 【文献标识码】A 【文章编号】1672-3783(2012)06-0163-01
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