用近红外光谱检测牛奶中的三聚氰胺

DETECTING THE MELAMINE OF PURE MILK BY NEAR INFRARED SPECTRA

研究了用近红外光谱法快速定性和定量检测纯牛奶中三聚氰胺.实验分别配制了两组不同三聚氰胺含量的纯牛奶样品,用于定性和定量分析.通过近红外光谱与聚类分析法相结合,可将含有和不含有三聚氰胺的牛奶样品有效分类;结合光谱预处理和波长选择及模型优化方法建立的检测三聚氰胺的近红外定量分析模型具有较好的稳定性和预测能力.结果表明,近红外光谱分析是一种快速、方便和环保的检测乳制品中三聚氰胺的新方法.

Rapid qualitative and quantitative detection for melamine in pure milk was studied by using near infrared spectra （NIRS）. Experiment was conducted by preparing two groups pure milk samples in which melamine content was different for qualitative and quantitative analysis. By combining NIRS technology with the cluster analysis method, two kinds of milk samples with and without melamine were classfied effectively. Spectrum pretreatment and wavelength choice methods were employed before model optimization. In this way, NIRS quantitative model for detecting melamine was established. The re- suits show that NIPS model of detecting melamine content in pure milk has good stability and predictive ability. It suggestes that NIRS can be used as a quick, green and convenient method for detecting melamine in dairy.