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投稿时间：2018-09-20
投稿时间：2018-09-20
中文摘要: 建立表面增强拉曼光谱快速检测奶粉中三聚氰胺的方法。基于溶剂萃取法，利用乙腈对奶粉中的三聚氰胺进行提取，制备银包金溶胶（Au@Ag NPs）作为增强基底，并优化增强基底的条件来获得最佳拉曼信号。用乙腈提取三聚氰胺，将5mol/LNaCl 和1mol/LNaOH 的混合溶液作为凝聚剂，使Au@AgNPs 与三聚氰胺分子紧密结合后检测，可获得响应最强的表面增强拉曼（surface-enhanced raman spectroscopy，SERS）信号。三聚氰胺在奶粉中的的检出限为0.008 5 mg/kg，回收率在71.07%～91.15%，相对标准偏差（n=6）在1.52%～4.22%。该方法可用于奶粉中三聚氰胺的快速检测。
Abstract:A method for rapid determination of melamine in milk powder was established by surface-enhanced raman spectroscopy（SERS）.Based on the solvent extraction method，acetonitrile was used to extract melamine from milk powder.The silver-coated gold colloid was prepared to use as Raman substrate，and the conditions of substrate was optimized.Melamine was extracted with acetonitrile.When mixed solution of 5 mol/L NaCl and 1 mol/L NaOH was used as coagulant to combine the concentrated silver-coated gold colloid with melamine，the SERS signal with the strongest response could be obtained.The levels of detail （LOD）of melamine in milk powder was 0.008 5 mg/kg.And the recovery rate was between 71.07%-91.15%and relative standard deviation（RSD，n=6）was between 1.52%-4.22%.So this method can be used for the rapid determination of melamine in milk powder.
文章编号：201912035 中图分类号： 文献标志码：
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