FPD分析汽油中硫化物的研究  

Study on the determination of sulfur compounds in the gasoline by FPD

作　　者：孙海燕[1] 曾勇平[1] 居沈贵[1] 

机构地区：[1]南京工业大学化学化工学院,江苏南京210009

出　　处：《化工科技》2007年第1期5-8,共4页Science & Technology in Chemical Industry

基　　金：国家自然科学基金资助项目(20436030);江苏省重点实验室开放课题资助项目(KJS03017)

摘　　要：选择乙硫醇、噻吩和二苯并噻吩作为汽油中的目标检测硫化物,采用火焰光度检测器(FPD)进行分析。建立了检测器的响应信号与硫化物浓度的响应模型,通过对标准溶液测定值的拟合得到了乙硫醇、噻吩以及二苯并噻吩的工作曲线分别为lnR=9.457 7+0.446 8 lnwsl、nR=9.339 1+0.504 3 lnws和lnR=1.968 3+1.489 8 lnws,3条曲线的拟合相关度都达到0.995以上,重复实验也有很好的一致性。利用程序升温可对乙硫醇、噻吩以及二苯并噻吩的混合物进行定量分析,结果证明了FPD对这3种混合的硫化物有很好的分离效果,而且定量分析的误差都小于1.5%。Ethanethiol,thiophene and dibenzothiophene as the model sulfur compounds were analysed by FPD（Flame Photometric Detector） in the gasoline. The relations between response singal and concentration of three kinds of sulfur compounds were established and the correlation coefficients were more than 0. 995. The calibration curves of ethanethiol, thiophene and dibenzothiophene were 1nR= 9. 457 7＋0. 446 8 1nω,1nR=9. 339 1 ＋0. 504 3 1nω, and 1nR= 1. 968 3＋1. 489 8 1nω, respectively. It showed good accordance through repeated experiments. FPD could quantify the mixture of ethanethiol,thiophene and dibenzothiophene by the means of temperature programming. The results indicated that FPD can separated the three kinds of sulfur compounds well and the errors of quantitative analysis were less than 1.5%.

关 键 词：FPD分析 乙硫醇 噻吩 二苯并噻吩 

分 类 号：TQ028[化学工程]