title: [Unregulated emissions from the gasoline vehicle].
abstract: Based on the emission test cycle of China National Regulation Stage III, the aldehyde and alkone emissions and VOCs emissions of three typical gasoline cars were studied with HPLC and TD-GC/MS and the exhausted particulates number and mass concentration were researched using ELPI. The results indicate that the unregulated emissions of different cars is diverse changed, the brake specific emission of the carbonyls in three cars are 36.44, 16.71 and 10.43 mg/km respectively and TVOC are 155.39, 103.75 and 42.29 mg/km respectively. Formaldehyde, acetaldehyde, acrolein, acetone and cyclohexanone are the main compounds in gasoline cars exhaust, which accounted for 77.9%-89.7% of total carbonyl compounds. Aromatic hydrocarbons and alkane are the main part of VOCs, the detected number of which is occupied 31.6%-39.2% and 23.1%-27.9% of VOCs. Toluene, xylene and benzene have high concentration, which are occupied 16.68%, 16.87% and 5.23% of TVOC in average. Ultra-fine particles (< 100 nm) dominate the particulates emission. Exhausted particulate number of high speeds is higher than that of slow and medium speeds.
authors.affiliation: National Laboratory of Auto Performance & Emission Test, Beijing Institute of Technology, Beijing 100081, China. wendy_10262003@yahoo.com.cn
authors.forename: Qiu-Wen
authors.initials: QW
authors.lastname: You
authors.forename: Ytun-Shan
authors.initials: YS
authors.lastname: Ge
authors.forename: Ke-Wei
authors.initials: KW
authors.lastname: You
authors.forename: Jun-Fang
authors.initials: JF
authors.lastname: Wang
authors.forename: Chao
authors.initials: C
authors.lastname: He
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000447:Aldehydes / Q000032:analysis; D002681:China; D002851:Chromatography, High Pressure Liquid; D005742:Gasoline; D006841:Hydrocarbons, Aromatic / Q000032:analysis; D009930:Organic Chemicals / Q000032:analysis*; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D000447:Aldehydes; D005742:Gasoline; D006841:Hydrocarbons, Aromatic; D009930:Organic Chemicals; D001335:Vehicle Emissions