硫化学发光检测器-气相色谱法测定废气中挥发性硫化物

摘要

采用硫化学发光检测-宽口径石英毛细管柱气相色谱法,建立了废气中羰基硫、硫化氢、二硫化碳、甲硫醇、乙硫醇、甲硫醚、乙硫醚、丙硫醇、异丙硫醇、噻吩及二甲二硫等11种挥发性硫化物的分析方法.硫化学发光检测器的灵敏度、选择性及线性范围均优于传统的火焰光度检测器.进样体积为0.2 ml时,硫化物的检出限为0.03～0.1 mg/m3.实际样品5次测定的相对标准偏差小于5.1％,加标回收率为83.7％～108.8％.测定了某炼油厂酸性水罐尾气、污油罐尾气及瓦斯气中挥发性硫化物,为其恶臭控制与治理提供检测手段和基础数据.%Sulfur chemiluminescence detector-vast capillary gas chromatography has been conducted on the analysis of volatilernsulfur compounds in waste gases. The recoveries of hydrogen sulfide, carbon disulfide, methyl mercaptan, ethyl mercaptan, carbonrndisulfide,dimethyl sulphide,diethyl sulphide, n-propyl merrcaptan, i-propyl merrcaptan, thiophene and dimethyl disulfide werernfrom 83. 7% to 108. 8% , the relative standard deviations were less than 5. 1% . When inject volumn was 0. 2 ml, the minimumrndetection levels of the above-mentioned volatile sulfur compounds varied between 0.03 mg/m3and 0. 1 mg/m3 Volatile sulfurrncompounds in waste gases from sour water tanks and oil tanks in an refinery and Gas were analyzed.