紫外荧光法测定天然气中总硫

摘要

利用紫外荧光法测定天然气中总硫含量.试验研究了载气流量、反应温度、进样量等对检测结果的影响,确定了最佳实验条件:载气流量为350 mL/min,反应温度为1 150℃,进样体积为20 μL.标准工作曲线线性良好,r2=0.999,测定结果的相对标准偏差为1.89％(n=10).对标准物质进行测定及方法比对试验证明,该法测定结果准确.紫外荧光法重复性好、稳定可靠,可用于天然气中总硫含量的检测.%The ultraviolet fluorescence method was applied to the determination of total sulfur content in natural gas.By changing the reaction temperature,carrier gas flow rate and sample amount,the influence of the different conditions on the test results was studied and the test conditions of the method was determined.The experiment conditions were as follows:the carrier gas flow rate was 350 mL/min,the reaction temperature was 1 150℃,the sampling volume was 20 μ L.The linearity of the standard curve was fine,r2=0.999.The relative standard deviation was 1.89％(n=10).The results of standard reference matterial comparation test and method comparation test showed that the detection result of this method was accurate.The ultraviolet fluorescence method has well repeatability,high accuracy,stable and reliable results,which can be used to determine total sulfur content in natural gas.