二阶冷阱预浓缩-气相色谱法测定大气中挥发性硫化物  

Determination of Volatile Sulfur Compounds by Gas Chromatography Coupled with Two-Step Trap Concentrators

作　　者：杨倩倩 刘春颖[1] 韩露 李培峰[1] 金慧安 段杉杉 张洪海[1] 杨桂朋[1] Yang Qianqian;Liu Chunying;Han Lu;Li Peifeng;Jin Huian;Duan Shanshan;Zhang Honghai;Yang Guipeng(The Key Laboratory of Marine Chemistry and Theory,Ministry of Education,College of Chemistry and Chemical Engineering,Ocean University of China,Qingdao 266100,China)

机构地区：[1]中国海洋大学海洋化学理论与工程技术教育部重点实验室,化学化工学院,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2023年第8期74-80,共7页Periodical of Ocean University of China

基　　金：国家重点研究发展计划项目(2016YFA0601301);国家自然科学基金项目(41676065);山东省自然科学基金项目(ZR2021MD113)资助。

摘　　要：本文采用自制二阶冷阱预浓缩装置结合气相色谱法测定了大气环境中三种挥发性硫化物(羰基硫(COS)、二甲基硫(DMS)、二硫化碳(CS_(2))),根据标准样品的响应值对二阶冷阱预浓缩装置的条件进行优化,确定了最佳测定条件。本方法测定大气中的三种含硫化合物的线性范围较好,精密度为0.43%~1.11%,检出限为1.70~2.58μg·L^(-1),高、低浓度的加标回收率分别为100.7%~102.3%和96.7%~137.2%。除了DMS的相对标准偏差为13%外,其余两种硫化物的相对标准偏差均在5.0%以内。对实际样品的测定与气质联用法无显著性差异。本方法可应用于环境空气中挥发性硫化物的测定,并对青岛胶州湾湿地不同植被类型区域挥发性硫化物进行了测定。The standard gas samples of three sulfur compounds,namely carbonyl sulfide(COS),dimethyl sulfide(DMS)and carbon disulfide(CS_(2))in the atmosphere were determined by gas chromatography coupled with two-step trap concentrators,and the optimal experimental conditions were detected according to the response values.This method had a good linear range for the determination of three sulfides in the atmosphere.Results showed that the precision was 0.43%~1.11%,and the limits of detection were 1.70~2.58μg·L^(-1).In addition,the recoveries of high and low concentrations were 100.7%~102.3%and 96.7%~137.2%,respectively.And the relative standard deviations were lower than 5.0%for two sulfides,but for DMS,the relative standard deviation was 13%.There was no significant difference between this method and Gas Chromatography-Mass Spectrometry.Thus,this method could be used for the determination of atmospheric sulfur compounds in different vegetation types of Jiaozhou Bay wetland.

关 键 词：挥发性硫化物 冷阱浓缩 热解吸 气相色谱法 环境空气 

分 类 号：O657.71[理学—分析化学]