炼油厂二硫醚恶臭污染物的监测

Monitoring Disulfide Malodorous Pollutants in Refinery

建立了气相色谱-质谱法(GC-MS)及硫化学发光检测气相色谱法(GC-SCD)定性和定量测定炼油厂二硫醚类恶臭污染物二甲二硫、乙基甲基二硫醚和二乙基二硫醚的方法。当进样体积为0.1mL时,GC-SCD法的二硫醚最低检出限为0.1～0.2mg/m3,二甲二硫和乙基甲基二硫醚的RSD不超过2.4%(n=5),二甲二硫加标回收率为88.9%(n=5)。采用该法对炼油厂二硫醚类恶臭污染物进行了测定。

The gas chromatography-mass spectrometry （GC -MS ） method and the gas chromatography-sulfur chemiluminescence detection （GC -SCD ） method were established for qualitative and quantitative determination of refinery malodorous pollutants, such as dimethyl disulfide, ethyl methyl disulfide and diethyl disulfide. By GC - SCD, when the sample volume is 0. 1 mL, the minimum detection limits of the disulfides are 0. 1 -0. 2 mg/m3 , the RSDs for dimethyl disulfide and ethyl methyl disulfide are less than 2.4% （ n =5 ）, the recovery of standard dimethyl disulfide is 88.9%. The methods were experimentally used in the determination of refinery malodorous pollutants.