便携式催化氧化-氢火焰离子化检测器法现场测定环境空气中非甲烷总烃的研究

Study on in-situ Determination of Non-methane Total Hydrocarbons in Ambient Air with Protable Catalytic Oxidation-hydrogen Flame Ionization Detector

现场快速监测方法在突发环境事件应急监测中发挥了越来越重要的支撑作用。本研究利用便携式催化氧化-氢火焰离子化检测器法快速测定环境空气中的非甲烷总烃。得出方法的检出限、精密度和准确度,并与实验室方法进行比对。结果表明,方法检出限为0.127 mg/m^(3),精密度为0.1%~3.6%,标样相对偏差-0.9%~-0.1%。方法便捷、快速,时效性强,可及时为突发空气环境事件处置提供技术支撑。

A rapid monitoring method plays an increasingly important supporting role in the environmental emergency monitoring.In this study,portable catalytic oxidation-hydrogen flame ionization detector-measuring method was used to rapidly detect the non-methane total hydrocarbons in ambient air.The detection limit,precision and accuracy of the method were determined and compared with the standard method in the laboratory.The results showed that the detection limit was 0.127 mg/m^(3),the precision was between 0.1%to 3.6%,and the determination result of standard sample was accurate.This method is more convenient,rapid,time-saving,data timeliness,and can provide technical support for the disposal of sudden air environmental events.