RAMAN SPECTRUM MEASURING METHOD FOR MELAMINE CONTENT IN MILK PRODUCT WITH DIFFERENT MATRIXES

摘要

A Raman spectrum measuring method for detecting the melamine content in milk products with different matrixes, which method comprises the following steps: (a) establishing a database of the characteristic curves of milk products with different matrixes; (b) measuring parts of a certain milk product to be measured with an unknown matrix, adding melamine standard solutions with different concentrations therein to obtain a series of milk product samples of this matrix which have known melamine relative concentrations; (c) carrying out Raman spectrum measurement and analysis on said milk product samples and obtaining the strength of the corresponding characteristic peak, thus obtaining the slope of the characteristic curve of the strength of the characteristic peak of said milk product sample as a function of the melamine relative concentration; (d) using the slope of the characteristic curve of said milk product sample to search the database established in step (a), so as to find a characteristic curve matching it; and (e) calculating the melamine concentration in the milk product to be measured using the characteristic curve and the strength of the characteristic peak of the milk product to be measured.