顶空气相色谱-质谱法测定国VIB车用汽油中挥发性有机组分

Determination of Volatile Organic Compounds in China VIB Vehicle Gasoline by Headspace Gas Chromatography-Mass Spectrometry

选择某加油站所售的国ⅥB车用汽油为研究对象,采用顶空气相色谱-质谱法测定国ⅥB车用汽油中挥发性有机组分峰面积比。结果表明:国ⅥB车用汽油中挥发性有机组分主要为C 5~C 9组分,其中烷烃最多,芳烃其次,烯烃最少;烷烃中异戊烷峰面积比最高,其次是异己烷和三甲基戊烷;芳烃中甲苯峰面积比最高,其次是二甲苯;烯烃主要为C 6组分,其中3-甲基-2-戊烯峰面积比最高。国ⅥB车用汽油中挥发性有机组分峰面积比可作为国ⅥB车用汽油危害因素识别与加油站空气中VOCs污染防治的重要依据。

The peak area ratio of volatile organic components in China VIB vehicle gasoline sold at a certain gas station was determined using headspace gas chromatography-mass spectrometry.The results show that the volatile organic compounds in China VIB vehicle gasoline are mainly C5-C9 components,in which alkanes are the most abundant,aromatics are the second,and olefins are the least.The peak area ratio of isopentane is the highest in alkanes,followed by isohexane and trimethylpentane.The peak area ratio of toluene is the highest in aromatic hydrocarbons,followed by xylene.In alkenes,C6 components are dominant,with 3-methyl-2-pentene having the highest peak area ratio.The peak area ratio of volatile organic compounds in China VIB gasoline can serve as an important basis for identifying hazardous factors of China VIB gasoline and preventing VOCs pollution in the air of gas stations.