| With the fast urbanization and urban development, the composition ofTVOC in the atmosphere is becoming more and more complicated; its densityis rising year by year. The influence from TVOC to the air quality and human’shealth is becoming a focus for people. In foreign countries, they haveaccumulated rich experiences to TVOC, in few cities of our country; we alsostudy TVOC recent years. The permanent residents in Changsha exceed7million, the vehicles reaches over135thousands, but there are few reportsabout the study of TVOC in Changsha.In this paper, nine representative volatile organic compounds (VOC) inChangsha nine sampling points are taken as the research object, using solidadsorption/thermal desorption gas chromatography to detect TVOC. Theobtained data were analyzed to study the atmosphere TVOC spatialdistribution, time distribution and characteristics, and its source analysis andevaluation methods in Changsha. There are a comprehensive, clearunderstanding, to provide reliable scientific basis for the prevention andmanagement of the city to TVOC in TVOC content of organic pollutants in theambient air of Changsha City the formation, distribution and law.Secondly, the use of solid adsorption/thermal desorption as a means ofpre-treatment established TVOC gas chromatography-flame ionizationanalytical test methods. Focus on the establishment of the analysis target istoluene, benzene, o-xylene, m-xylene, p-xylene, n-butyl acetate, n-undecane,ethylbenzene, styrene, etc., the quantification of the remaining uncorrectedpeak with toluene. The method does not require organic solvent extraction,environment-friendly, simple steps, a high degree of automation, high sensitivity, accuracy and precision are in line with the analysis and testingrequirements. The binding of target compound toxicity index and the creationof evaluation methods to provide a theoretical basis and the improvement ofambient air quality for preventing ecological damage, and maintaining humanhealth. |
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