摘要
为了解决固定污染源非甲烷总烃(NMHC)在线监测系统比对中,在实验室中气相色谱(GC)法检测样品结果偏低的问题,本文选取便携式分析仪和GC仪进行实验对比,从载气选择、标准参考气体、储存时间和样品前处理等方面,分析对NMHC检测的影响,以提高实验室测试结果的准确性。结果表明,现场采样完成后,样品需避光并低温保存运输。样品需放理化干燥箱中加热至液滴凝结现象消除后方可上机测试,从采样到分析要在8 h内完成;对于不同行业成分较复杂的废气组分,建议采用甲烷、丙烷混合标准气体,这样测定结果更接近固定污染源原始排放量。本研究结果可为环境管理部门监管污染源排放提供技术支持。
In order to solve the problem of low sample detection results by gas chromatography(GC)in the comparison of online monitoring system for non-methane total hydrocarbon(NMHC)of stationary pollution source,this paper selected portable analyzer and GC instrument for experimental comparison,and analyzed the influence on NMHC detection from the aspects of carrier gas selection,standard reference gas,storage time and sample pretreatment to improve the accuracy of laboratory test results.The results show that after the on-site sampling is completed,the samples should be stored away from light and transported at low temperature.Before machine testing,the samples should be heated in the physical and chemical drying oven until the droplet condensation phenomenon is eliminated.The samples should be tested within 8 h from sampling to analysis and for the analysis of complex components in different industries,it is recommended to use methane and propane mixed standard gas,so that the determination results are closer to the original emission concentration of fixed pollution sources.The results of this study will provide technical support for environmental management departments to supervise the emission of pollution sources.
作者
耿冬梅
王丽敏
葛福玲
于秀彦
汪碧芬
GENG Dongmei;WANG Limin;GE Fuling;YU Xiuyan;WANG Bifen(Weihai Ecological Environment Monitoring Center of Shandong Province,Weihai Shandong 264200)
出处
《首都师范大学学报（自然科学版）》
2023年第4期36-40,共5页
Journal of Capital Normal University：Natural Science Edition
基金
山东省环境科学学会基金项目(202208)。
关键词
气相色谱法
便携式催化氧化-氢火焰离子化检测器法
比对
gas chromatography
portable catalytic oxidation-hydrogen flame ionization detector method
comparison CLC:X830.2
G305 DC:A
