Pollution Characteristics and Source of Atmospheric N-alkanes in Zhongshan
In order to investigated the pollution characteristics of n-alkanes on the atmosphere of Zhongshan City,the main composition,concentration characteristics,source and OFP of n-alkanes in the atmosphere of Zhongshan City were analyzed by SUMMA tank sampling and atmospheric preconcentration gas chromatography-mass spectrometry in 2022.The results showed that 11 types of n-alkanes were detected on the atmosphere of Zhongshan City,with a total concentration of 27.71μg/m3.Ethane,n-propane,n-butane,n-pentane and n-hexane accounted for a relatively larger proportion of the concentration.The mass concentration and these five compounds accounted for 87.69%of the total concentration of n-alkanes.The ozone generation potential(OFP)of five n-alkanes(ethane,n-propane,n-butane,n-pentane and n-hexane)was analyzed.The OFP contribution of n-butane and n-pentane were more significant,with a total proportion of 70.34%.
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