流动注射-4-氨基安替比林分光光度法测定水中挥发酚不确定度评定

Evaluation Report on Uncertainty of Volatile Phenol Measurement in Water by Mobile Injection-4-Aminopyrin Spectrophotometry

应用测量不确定度评定理论,结合流动注射-4-氨基安替比林分光光度法对水中挥发酚测量不确定度进行全面分析,找出其影响不确定因素并对不确定度进行了评估,实验结果表明:流动注射在线蒸馏-4-氨基安替比林分光光度法测定水中挥发酚含量为0.050mg/L的样品,其扩展不确定度为3.92×10^-3mg/L,结合所有分量来看,样品的重复性引入的不确定度影响最大。同时,提高量器精密度也是降低不确定度的有效方法。

Using the theory of measurement uncertainty evaluation and combining with the spectrophotometry method with mobile injection-4-aminobietrin spectrophotometry,this paper made a comprehensive analysis of measurement uncertainty of volatile phenols in water to find its influential factors of uncertainty and to evaluate the uncertainty.Experimental analysis shows that the content of volatile phenols in water of the sample determined by mobile injection-4-aminobietrin spectrophotometry is 0.050mg/L.Its expanded uncertainty is 3.92×10-3 mg/L.In combination with all components and all components,the uncertainty introduced by the repetition of the sample has the greatest effect.At the same time,improving the precision of the quantizer is also an effective method to reduce the uncertainty.