Quantitative determination of melamine in milk using Ag nanoparticle monolayer film as SERS substrate
Quantitative determination of melamine in milk using Ag nanoparticle monolayer film as SERS substrate
复制标题
以银纳米粒子单层膜为SERS基底定量测定牛奶中的三聚氰胺
DOI：
10.1016/j.physe.2016.12.013
复制
发表时间：
2017-04-01
影响因子：
3.3
通讯作者：
Huang, Mingju
中科院分区：
文献类型：
--
作者：
Li, Ruoping;Yang, Jingliang;Huang, Mingju
A Raman method employing silver nanoparticle (Ag NP) monolayer film as Surface-enhanced Raman Scattering (SERS) substrate was presented to rapidly detect melamine in milk. The Ag NPs with 80 nm diameter were modified by polyvinylpyrrolidone to improve their uniformity and chemical stability. The treatment procedure of liquid milk required only addition of acetic acid and centrifugation, and required time is less than 15 min. The Ag NP monolayer film significantly enhanced Raman signal from melamine and allowed experimentally reproducible determination of the melamine concentration. A good linear relationship (R-2=0.994) between the concentration and Raman peak intensity of melamine at 681 cm(-1) was obtained for melamine concentrations between 0.10 mg L-1 and 5.00 mg L-1. This implies that this method can detect melamine concentrations below 1.0 mg L-1, the concentration currently considered unsafe.
