基于拉曼光谱的三聚氰胺检测分析系统

Hai-ling Xiao, Ru-gang Zhong, D. Zheng
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引用次数: 1

摘要

三鹿事件引起了人们的高度关注。三聚氰胺是一种在工业中广泛使用的有机化学品,它被添加到牛奶中以增加蛋白质含量。显然,传统的凯氏定氮法已经不适合检测真实的蛋白质含量。针对市场上含有三聚氰胺的牛奶,需要一种快速简便的方法来满足牛奶中三聚氰胺的检测需求。本研究采用表面增强拉曼光谱(SERS)和便携式拉曼光谱仪开发了具有快速检测和报警功能的分析系统。首先,建立了检测牛奶中三聚氰胺的定性分析方法。以709cm -1峰为定性分析的基本峰。在此基础上,进一步定义了定量方法。牛奶中三聚氰胺的浓度与709cm -1 /1026cm -1的比值在牛奶中三聚氰胺的标准浓度在3ppm ~ 10ppm范围内呈良好的线性关系。该方法检测限为1ppm,量化限为3ppm。回收率为86% ~ 106%,符合GB/T22388-2008(80% ~ 110%)的要求。建立了牛奶中三聚氰胺的分析系统。该系统包含多种功能。在三聚氰胺浓度在3ppm ~ 10ppm范围内的条件下,利用所使用的分析系统快速完成检测和结果。当浓度高于3ppm时显示红色信号,当浓度低于3ppm时显示绿色信号。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Analytical System Based on Raman Spectroscopy in Melamine Detection
People have paid close attention to melamine by Sanlu Event. Melamine, a widely used as an organic chemical in industry, was added in milk to increase the protein content. Obviously, traditional kjeldahl hasn't suitable to detect real protein content. Focusing on the milk with melamine in market, a rapid and easy method is necessary to meet the needs to detect melamine from the milk. In this study, the analytical system was developed by surface enhanced Raman spectrum (SERS) and portable Raman spectrometer, which had fast detecting and alarming functions. Firstly, Qualitative analysis method for detecting melamine in milk was found. And the peak 709cm -1 was used as the essential peak for qualitative analysis method. On the basis of that, quantitative method was further defined. The concentration of melamine in milk vs Ratio of 709cm -1 /1026cm -1 showed a good linear relationship when the standard concentration of melamine in milk within 3ppm to 10ppm. Detective limit of this method was 1ppm, and the quantization limit was 3ppm. Recovery was in 86% to 106% and satisfied the request of GB/T22388-2008 (80%- 110%). Analytical system was established for determination melamine in milk. Multiple functions were contained in this system. Detecting and result were completed rapidly by used analytical system on condition that the concentration of melamine within 3ppm to 10ppm. The red signal was displaying at concentration above 3ppm, and the green signal was giving at concentration below 3ppm.
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