Portable light filter type Raman spectrometer for measuring protein adulteration in milk or milk powder

Abstract

The invention discloses a novel portable type Raman spectrometer instrument for specially monitoring protein adulteration in milk or milk powder by using Raman spectroscopy. The specific Raman scattering frequency shift of milk and other common adulterated substances by utilizing a Raman effect, and the adulterated substances are detected. During design, expensive optical elements in other Raman instruments are not used, and a light filter type optical structure with low price is adopted, so that the instrument is specially used for detecting the milk or milk powder and adulterated substances therein; and meanwhile, the cost is greatly reduced, and popularized food safety detection can be performed in farmer's markets and the like. Finally, the milk powder containing melamine is accurately detected by using the Raman spectrometer.

Description

technical field [0001] The invention relates to a novel food safety testing instrument using Raman spectroscopy technology, in particular to a portable Raman spectrometer which can be specially used to detect protein adulteration in milk and milk powder. Background technique [0002] In recent years, there have been many incidents of protein adulteration in milk and milk powder on the market. Since the routine and rapid measurement of protein content in milk sources is mainly done by measuring its nitrogen content, criminals illegally add protein containing Nitrogen impurities are used to increase the nitrogen content of milk powder or milk to increase the protein content and pretend to be high-quality milk powder. The most typical nitrogen-containing substance is melamine, and other nitrogen-containing substances include ammonium sulfate, dicyandiamide, urea, etc. These nitrogen-containing substances are usually difficult to be absorbed by the human body, and some adultera...

AI Technical Summary

Problems solved by technology

However, the usual Raman spectroscopic instruments require lasers with better performance, high-precision grating spectroscopic systems and expensive array CCD detectors, which are costly, expensive, and bulky

The price of these instruments ranges from hundreds of thousands of yuan to millions of yuan, making it difficult to apply them in daily food testing.

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