表面增强Raman散射光谱测定汽油中的正丙硫醇和异丙硫醇

吉林大学学报(理学版)

表面增强Raman散射光谱测定汽油中的正丙硫醇和异丙硫醇

秦美红, 陈洋, 廖雪, 杨磊, 田媛, 张寒琦, 陈艳华

吉林大学化学学院, 长春 130012

收稿日期:2013-09-09 出版日期:2014-05-26 发布日期:2014-08-27
通讯作者: 陈艳华 E-mail:chenyanhua@jlu.edu.cn

Determination of 1Propanethiol and 2Propanethiol in Gasolineby SurfaceEnhanced Raman Scattering Spectroscopy

QIN Meihong, CHEN Yang, LIAO Xue, YANG Lei,TIAN Yuan, ZHANG Hanqi, CHEN Yanhua

College of Chemistry, Jilin University, Changchun 130012, China

Received:2013-09-09 Online:2014-05-26 Published:2014-08-27
Contact: CHEN Yanhua E-mail:chenyanhua@jlu.edu.cn

摘要/Abstract

摘要：

以银溶胶为基底, 用表面增强Raman散射(SERS)光谱速测定液体汽油样品中的正丙硫醇和异丙硫醇, 并对聚沉剂NaCl浓度、体系反应时间及体系的pH值等实验条件进行优化, 获得最佳SERS信号. 结果表明: 在最优实验条件下, 异丙硫醇和正丙硫醇的质量浓度与SERS信号强度均呈良好的线性关系, r>0.998 1, 检出限分别为0.12,0.86 mg/L; 汽油样品中两种硫醇化合物的回收率为62.88%~111.51%, RSD≤8.94%, 即该方法对正丙硫醇和异丙硫醇的测定可信度较高.

关键词: 表面增强Raman散射, 硫醇, 汽油

Abstract:

In this study, the surfaceenhanced Raman scattering (SERS) spectroscopy was used to determine 1propanethiol and 2propanethiol in liquid gasoline samples, and a simple, rapid method for the quantification of 1propanethiol and 2propanethiol was developed. By using silver nanoparticles as substrate, the influence of experimental parameters, such as the concentration of sodium chloride, incubation time and pH of the system on SERS performance was examined. The experimental parameters were optimized in order to achieve the optimal SERS signals. The mass concentrations of 1
propanethiol and 2propanethiol in a certain range showed a good linear relationship with the enhanced SERS intensities under the optimum conditions of the experiment. With r>0.998 1, the limits of detection of the two mercaptans were 0.86 mg/L and 0.12 mg/L respectively. Experiments of commercial gasoline samples were also performed by this method, and the recoveries were 6288%—11151%, RSD≤894%. The experimental results indicate that the present method for determing of mercaptans has a higher credibility.

Key words: surfaceenhanced Raman scattering (SERS), mercaptan; gasoline

中图分类号:

O657.37

秦美红, 陈洋, 廖雪, 杨磊, 田媛, 张寒琦, 陈艳华. 表面增强Raman散射光谱测定汽油中的正丙硫醇和异丙硫醇[J]. 吉林大学学报(理学版), 2014, 52(03): 591-595.

QIN Meihong, CHEN Yang, LIAO Xue, YANG Lei,TIAN Yuan, ZHANG Hanqi, CHEN Yanhua. Determination of 1Propanethiol and 2Propanethiol in Gasolineby SurfaceEnhanced Raman Scattering Spectroscopy[J]. Journal of Jilin University Science Edition, 2014, 52(03): 591-595.

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