【摘要】 采用恒电位氧化还原法研制出规整度高的纳米化银基底。利用研制的纳米化银基底测试了模拟汽油中噻吩硫的表面增强拉曼光谱。结果显示,1 005 cm–1特征峰峰高增大约125倍,峰面积约增强6 300倍。特征峰相对峰面积与模拟汽油中噻吩硫含量呈乘数幂关系,关系式为Y=59439X 0.3965。以此利用相对峰面积计算汽油中噻吩硫含量。利用纳米银基底表面增强拉曼光谱法测定汽油中噻吩含量,测定结果与气相色谱法测定结果相符,相对标准偏差为0.07%,加标回收率为97%~106%。该法可用于油品中微量硫的绿色分析和产品质量控制。更多还原

【Abstract】 The more regular nano-silver substrate was prepared by potentiostatic oxidation-reduction method. It was used to detect thiophene in simulated gasoline by surface-enhanced Raman spectroscopy(SERS). The peak height of 1005 cm–1 as characteristic peak was enhanced 125 times, and the peak area was enhanced 6 300 times. The equation between characteristic peak area and the sulfur concentration in thiophene in simulated gasoline was Y=59439X 0.3965. The quantitative analysis of sulfur of thiophene in gasoline with this method were consistent with those detected by GC. The relative standard deviation of detection results was 0.07%, and the recovery was 97%–106%. This method can be used in sulfur green analysis in oil and quantity controlling.更多还原