定电位电解法固测定污染源排气中二氧化硫的不确定度评定

Uncertainty Evaluation of Solid Determination of Sulfur Dioxide in Exhaust Gas of Pollution Source by Constant Potential Electrolytic Method

测量不确定度是与测量结果紧密相关的参数,用于表征测量结果合理分散性。在实验室数据质量控制上不可惑缺。本文根据《固定污染源排气中二氧化硫的测定定电位电解法》(HJ/T57-2017)标准方法及不确定度评定方法,通过分析评估烟气分析仪测量固定污染源烟气中二氧化硫的影响因素,进行测量不确定度评定,以校准结果。最终计算得出相对扩展不确定度度为6. 76%,K=2。

Measurement uncertainty is a parameter closely related to measurement results, which is used to characterize the reasonable dispersion of measurement results. The quality control of laboratory data is indispensable. According to the standard method and uncertainty evaluation method of Determination of Sulfur Dioxide in Fixed Pollution Source Exhaust (HJ/T57-2017 ), the uncertainty of measurement was evaluated by analyzing and evaluating the influencing factors of measuring sulfur dioxide in fixed pollution source flue gas by flue gas analyzer, so as to calibrate the results. The relative expanded uncertainty was 6.76%, K=2.