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本文提出了一种新型的基于银修饰的氨基改性粉末多孔材料的表面增强拉曼光谱(SERS)检测方法,以乐果为探针分子,分析了银溶胶的量和反应时间对基底SERS活性的影响。乐果和水胺硫磷在以银溶胶为基底时,分别只能检测到100mg/L和7mg/L,而以银修饰的氨基改性粉末多孔材料为基底时,乐果和水胺硫磷的最低检测浓度分别达到0.5mg/L和0.14mg/L,说明该基底具有很好的增强效果。此外,检测低浓度下乐果和水胺硫磷的混合农药溶液,各农药的特征峰在谱图中仍然能清晰可辨。根据实验结果可以推测,银修饰的氨基改性粉末多孔材料作为SERS基底,可以有效地应用于有机磷农药残留的检测。
In this paper, a new surface-enhanced Raman spectroscopy (SERS) detection method based on silver-modified amino modified powder porous materials was proposed. Using dimethoate as probe molecule, the effect of silver sol amount and reaction time on SERS activity Impact. Dimethoate and isosorbide can only detect 100 mg / L and 7 mg / L, respectively, on a silver sol base, whereas on the basis of a silver-modified amino-modified powder porous material, The lowest detection concentration reached 0.5mg / L and 0.14mg / L, indicating that the substrate has a very good enhancement effect. In addition, the detection of mixed pesticides solution of dimethoate and isocarbophos at low concentrations, the characteristic peaks of each pesticide can still be clearly identified in the spectrum. According to the experimental results, it can be speculated that silver modified amino modified porous materials can be effectively applied to the detection of organophosphorus pesticide residues as SERS substrates.