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 water. A cryogenic trap-thermal desorption device was developed, 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. Analyzing the content of sulfur dioxide through ultraviolet fluorescence method indirectly help to gain the total concentration of volatile organic sulfur compounds. The trapping temperature, gas stripping room temperature, desorption temperature, oxidation temperature were 5℃, 65℃, 150℃ and 1000℃ and the purge time was 20min, respectively. The detection limit was as low as 6ng/L, precision was 5.5% and recovery of the method was 91.6~95.1%. This content of trace amounts of VSCs determined from pond water at Qingdao was 1503~1911ng/L.
王艳君, 郑晓玲, 何鹰, 张栋, 王保栋. 环境水中总挥发性有机硫化物的检测方法[J]. 中国环境科学, 2012, 32(6): 1040-1045.
WANG Yan-Jun, ZHENG Xiao-Ling, HE Ying, ZHANG Dong, WANG Bao-Dong. Research on determination of total volatile organic sulfur compounds in water. CHINA ENVIRONMENTAL SCIENCECE, 2012, 32(6): 1040-1045.