离子色谱法测定水中氯化物的不确定度分析

Analysis of uncertainty in detecting chlorine from water by using ion chromatography

目的对离子色谱法测定水中氯化物的不确定度进行分析,找出影响不确定度的因素,对不确定度进行评估,给出不确定度,如实反映测量的置信度和准确性。方法应用测量不确定评定理论,分析离子色谱法测定水中氯化物的不确定度。结果得出用离子色谱法测定水中氯化物含量在1.50～75.00mg/L范围的扩展不确定度:U=2.82(mg/L),k=2。结论该不确定度评价方法在实际工作中有较强的实用价值。

Objective To analyze the uncertainty in detecting the chlorine in drinking water by ion chromatography, find out the factors which influence the uncertainty, evaluate the uncertainty and give out the uncertainty of evaluation which faithfully reflects metrical credibility and accuracy. Methods The uncertainty in detection of chlorine in drinking water by ion chromatography was analyze by using the theory of metrical uncertainty. Results The extended uncertainty U=2.82（mg/L）, k=2, which detects the chlorine in drinking water by ion chromatography in the content from 1.50mg/L to 75.00mg/L. Conclusion The evaluative method of uncertainty is of great practical value.