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以表面增强试剂OTR202和OTR103作为表面增强拉曼光谱(SERS)的活性基底,探索建立甲萘威水溶液的SERS检测方法。首先对比分析了甲萘威水溶液的普通拉曼光谱与SERS。然后分析了表面增强试剂与待测样本的加入量对甲萘威水溶液的SERS的影响。最后分析了质量浓度在0.1~15.0 mg/L范围内的甲萘威水溶液的SERS,并以1374 cm-1处的特征峰强度与甲萘威水溶液浓度进行线性回归,得到线性方程为y=414.5x+481.59,决定系数R2=0.9864。试验结果表明该研究方法对甲萘威水溶液的检测限可达到0.1 mg/L,说明以表面增强试剂OTR202和OTR103为SERS活性基底的SERS检测方法可用于水中甲萘威残留检测。
Surface-enhanced reagents OTR202 and OTR103 were used as active substrates for surface-enhanced Raman spectroscopy (SERS), and the SERS detection method for establishing carbaryl solution was explored. Firstly, the common Raman spectra and SERS of carbaryl aqueous solution were compared and analyzed. Then the influence of surface-enhanced reagent and the amount of sample to be analyzed on the SERS of carbaryl in aqueous solution was analyzed. Finally, the SERS of carbaryl in the concentration range of 0.1 ~ 15.0 mg / L was analyzed. The linear regression equation of the characteristic peak intensity at 1374 cm-1 and the concentration of carbaryl was obtained. The linear equation was y = 414.5 x + 481.59, coefficient of determination R2 = 0.9864. The experimental results showed that the detection limit of this method for carbaryl was 0.1 mg / L, which indicated that the SERS detection method based on surface-enhanced reagents OTR202 and OTR103 could be used to detect carbaryl in water.