CAJ | 학술논문

以银溶胶为基底,用表面增强Raman散射(SERS)光谱快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>0.9981,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.
이은용효위기저,용표면증강Raman산사(SERS)광보쾌속측정액체기유양품중적정병류순화이병류순,병대취침제NaCl농도、체계반응시간급체계적pH 치등실험조건진행우화,획득최가SERS신호.결과표명：재최우실험조건하,이병류순화정병류순적질량농도여SERS신호강도균정량호적선성관계,r>0.9981,검출한분별위0.12,0.86 mg/L；기유양품중량충류순화합물적회수솔위62.88%~111.51%,RSD≤8.94%,즉해방법대정병류순화이병류순적측정가신도교고.
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.