环境空气监测中NO_x、SO_2空白值的研究

Study on Blank Value of Nitric Oxides and Sulfer Dioxide in Amlient Air Monitoring of Huizhou.

本文研究了惠州市市区环境空气监测中氮氧化物、二氧化硫的现场空白值与室内空白值的差异，得出了二氧化硫测定的两种空白值相差无几，氮氧化物测定的两种空白值相差较显著的结论。提出了在计算环境空气氮氧化物浓度时，扣除现场空白值是消除分析误差的一个不可忽视的环节。讨论了现场空白值受环境条件（气温。

On the analysis of nitric oxides and sulfer dioxide,we have studied the difference between blank value inside and outside in urban amlient air monitoring.The results show that blank va lue of sulfer dioxide is almost the same.However,there is a great difference for nitric oxides.So we’ve considered the relationship between blank value and environmental factors,as air temperature,intensify of illumination and so on.In short,we can't reglect the fact that deducting blank value is an important link to reduce analysis error when we calculate the concentration of nitric oxides.