title: [Research on determination of total volatile organic sulfur compounds in the atmosphere].
abstract: A detection technology was established comprising trap, desorption, oxidation and UV fluorescence determination process, and used for the test of total concentration of trace volatile sulfur compounds (VSCs) in the atmosphere. A cryogenic trap-thermal desorption device was developed, integrating the advantages of solid retention method and cryogenic condensation method, which was applied to capture and enrich trace volatile organic sulfur compounds. Under high temperature and combustion-supporting gas, the VSCs were completely oxidized into sulfur dioxide. By analyzing the content of sulfur dioxide through ultraviolet fluorescence method indirectly calculated to gain the total concentration of volatile organic sulfur compounds. The trapping temperature, desorption temperature and the oxidation temperature were 5 degrees C, 150 degrees C and 1 000 degrees C, and the precision and recovery of the method were 5.46% and 99.6%-109.2%, respectively. The content of trace amounts of atmospheric VSCs determined from February to April at Qingdao was 42-195 ng x m(-3).
authors.affiliation: Marine Ecology Research Center, State Oceanic Administration, First Institute of Oceanography, Qingdao 266061, China. wyj@fio.org.cn
authors.forename: Yan-Jun
authors.initials: YJ
authors.lastname: Wang
authors.forename: Xiao-Ling
authors.initials: XL
authors.lastname: Zheng
authors.forename: Ying
authors.initials: Y
authors.lastname: He
authors.forename: Dong
authors.initials: D
authors.lastname: Zhang
authors.forename: Bao-Dong
authors.initials: BD
authors.lastname: Wang
mesh_terms: D001272:Atmosphere / Q000032:analysis*; D002246:Carbon Disulfide / Q000032:analysis*; D005591:Chemical Fractionation / Q000295:instrumentation / Q000379:methods; D004220:Disulfides / Q000032:analysis; D013050:Spectrometry, Fluorescence / Q000295:instrumentation* / Q000379:methods; D013463:Sulfuric Acid Esters / Q000032:analysis*; D055549:Volatile Organic Compounds / Q000032:analysis*
chemical_list: D004220:Disulfides; D013463:Sulfuric Acid Esters; D055549:Volatile Organic Compounds; C021181:dimethyl disulfide; C007482:dimethyl sulfate; D002246:Carbon Disulfide