环境工程学报2016，Vol.10Issue(10)：5833-5839,7.DOI:10.12030/j.cjee.201504170
低浓度有机硫恶臭物质的采样分析方法
Sampling and measurement method research on trace-level odor organic sulfur compounds
摘要
Abstract
Volatile organic sulfur compounds are the major chemicals associated with odor pollution.There are challenges in the sampling and determination of the trace level odor organic sulfur compounds due to their volatility and mutability.Currently,the detection method for volatile organic sulfur compounds in the atmosphere is not perfect.In this study,detection technology was established to measure the trace concentration of volatile organic sulfur compounds in the atmosphere,and included cryogenic trap adsorption,thermal desorption,and gas chromatography.Dimethyl sulfide and ethyl mercaptan were chosen as representatives.A series of adsorption and thermal desorption experiments were conducted to determine the effects of important operating parameters.Ethyl mercaptan and dimethyl sulfide were adsorbed effectively by activated carbon in the sampling tube,which was placed in a cryogenic environment provided by liquid nitrogen (-130 ℃).The cryogenic saturated adsorption capacity of activated carbon was 0.1 to 0.3 g · g-1,and the optimum desorption temperature was 230 ℃ at 200 min,with a nitrogen flow rate of 20 mL · min-1.The relative standard deviations is less than 5％,when the concentration ranged from 50 μg · L-1 to 16 mg · L-1.The method detection limits wereμg · L-1 concentration level.关键词
甲硫醚/乙硫醇/活性炭/冷凝浓缩/热解吸/气相色谱Key words
dimethyl sulfide/ethyl mercaptan/active carbon/cryogenic adsorption/thermal desorption/gas chromatography分类
资源环境引用本文复制引用
马利霞,蔡旺锋,陈益清,张旭斌..低浓度有机硫恶臭物质的采样分析方法[J].环境工程学报,2016,10(10):5833-5839,7.基金项目
深圳市科技研发资金(JCYJ20150630114140637,JCYJ20160331113033413) （JCYJ20150630114140637,JCYJ20160331113033413）
