垃圾填埋气中总有机硫的测定

Determination of Total Organic Sulfur in Waste Landfill Gas

采用微库仑综合分析仪，探索了垃圾填埋气中总有机硫的测定原理和方法，并通过对比实验确定了测定过程中的最佳操作条件：10mg／L标液，偏压170-185mV，氮气流量220mL／min，氧气流量140ml／min，积分电阻2kΩ，放大倍数160，进样量8．6μL。该方法测得结果的相对误差小于10％，重复性好，操作简单快速，对样品测量的相对标准偏差均小于5％。对垃圾填埋气的实际测量结果表明，总有机硫含量为1．0-6．0mg/m^3。

The microcoulometer was used to explore determination principle and method of total organic sulfur in waste landfill gas. And after contrastive experimentations, the best condition for the determination was ascertained. Concentration of standard solution was 10 rag/L, bias was 170-185 mV, N2 flow rate was 220 mL/min, O2 flow rate was 140 mL/min, integral resistance was 2 kΩ, amplifying multiple was 160, and sample volume was 8. 6 μL. The relative error of the method was less than 10% and the method has good reproducibility, easy and quick operation. The relative standard deviation of the determined samples was all less than 5%. The determination results of the waste landfill gas showed that the contents of total organic sulfur were between 1.0 mg/m^3 and 6. 0 mg/m^3.