Comparison of Two Uncertainty Evaluation Methods of Non-methane Total Hydrocarbons in Ambient Air by Gas Chromatography
Using Top-down two uncertainty evaluation methods,the control chart method and the linear fitting method,to evaluate the uncertainty of methane in the non-methane total hydrocarbons in the ambient air by gas chromatography.The results shows that the uncertainty result of the control chart method is:(3.05±0.19)(k=2)mg/m3,the result of using the linear fitting method is in the range of 0.86～8.57(mg/m3),the uncertainty is 0.15,(k=2)mg/m3.There are no obvious differences between the two methods via the result.These two methods are based on the quality control data accumulated daily in the laboratory,daily analysis quality control of environmental laboratories,its operability is stronger,wider scope of application.
control chart methodthe linear fitting methoduncertaintymethane
万方数据
维普
