气相色谱法测定空气中15种含硫恶臭污染物及其应用

Determination of 15 Sulfur Containing Odor Pollutants in Ambient Air by Gas Chromatography and its Application

本文建立了环境空气中硫化氢、羰基硫、甲硫醇、乙硫醇、甲硫醚、二硫化碳、异丙硫醇、叔丁硫醇、正丙硫醇、异丁硫醇、甲基异丙基硫醚、乙硫醚、二甲二硫醚、噻吩和四氢噻吩等15种含硫恶臭污染物的测定方法。气体样品经冷阱浓缩处理后进入安装有脉冲式火焰光度检测器(PFPD)的气相色谱仪进行分析测定。结果表明:15种含硫化合物在5~100 nmol/mol范围内具有良好线性,相关系数大于0.995,方法的检测限为0.3~1.4μg/m^(3)。对20 nmol/mol的标准气体进行平行测定,准确度为87.1%~112.5%,RSD为0.3%~6.1%。

A method for the determination of 15 sulfur-containing odor pollutants in ambient air,including hydrogen sulfide,carbonyl sulfide,methyl mercaptan,ethanethiol,methyl sulfide,carbon disulfide,isopropyl mercaptan,tert butyl mercaptan,n-propyl mercaptan,isobutyl mercaptan,methyl isopropyl sulfide,ethyl sulfide,dimethyl disulfide,thiophene and tetrahydrothiophene,was established.After being concentrated in a cold trap,the gas sample enters gas chromatography(GC)equipped with a pulse flame photometric detector(PFPD)for analysis and determination.The results showed that 15 sulfur compounds showed good linearity in the range of 5~100 nmol/mol,the correlation coefficient was greater than 0.995,and the detection limit of the method was 0.3~1.4μg/m^(3).The accuracy of parallel determination of 20 nmol/mol standard gas was 87.1%~112.5%,and the RSD was 0.3%~6.1%.