摘要
挥发性有机物(volatile organic compounds,VOCs)及非甲烷总烃(non-methane hydrocarbon,NMHC)都是表征气体中有机化合物含量的重要指标,二者的物质组成存在差异,但二者量值在一定范围内具有相关性。为研究二者量值之间的相关性,该文采用3种方法测定不同VOCs标准气体的非甲烷总烃值,并使用气相色谱-氢火焰离子化检测器(gas chromatography-hydrogen flame ionization detector,GC-FID)直接测定VOCs标样中各组分的峰面积,通过对比分析标样的VOCs理论值和非甲烷总烃测定值之间的相关性,成功建立二者之间的数学模型,并对该模型进行验证。分析结果表明:双柱法测定值与修正理论值之比为98.1%~100%,模型可信。
Volatile organic compounds(VOCs)and non-methane hydrocarbons(NMHC)are important indexes to characterize the content of organic compounds in gases.There are differences in the composition of VOCs and NMHC,but the value of a quantity of the two are related within a certain range.In order to study the correlation between the value of a quantity of VOCs and NMHC,three methods were used to determine the NMHC values of different VOCs standard gases.The content of each peak area in the VOCs standard was directly determined by gas chromatography-hydrogen flame ionization detector(gas chromatography-hydrogen flame ionization detector,GC-FID).A mathematical method was successfully established by comparing and analyzing the correlation between the theoretical values of VOCs and the measured of NMHC.And then,the model was verified.The analysis results show that the ratio of the measured value of the two-column method to the modified theoretical value is 98.1%-100%,and the model is credible.
作者
李佳
陈勇
张渝
邢利利
张晓旭
谢永洪
谢翔
吴晓峰
LI Jia;CHEN Yong;ZHANG Yu;XING Lili;ZHANG Xiaoxu;XIE Yonghong;XIE Xiang;WU Xiaofeng(Chengdu Environmental Monitoring Center,Chengdu 610072,China;Sichuan Ecological Environmental Monitoring Station,Chengdu 610072,China)
出处
《中国测试》
CAS
北大核心
2019年第12期75-82,共8页
China Measurement & Test
