期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：227
期号：5
页码：052013
DOI：10.1088/1755-1315/227/5/052013
出版社：IOP Publishing
摘要：This paper selected several test vehicle, and collected the samples at constant volume sampler (CVS) tunnel, sampling bag, and exit of the gas pump respectively, and analysed the carbonyls using high performance liquid chromatography (HPLC). The result shows that the gas at the sampling bag is uniform and stable in concentration, compared with that at the tunnel and the gas pump exit; it is the right site to collect the non-regulated emissions to reduce the test error and improve the precision.
