A method for predicting bovine whey protein content based on dielectric properties

Abstract

The invention belongs to the technical field of food detection, and particularly relates to whey protein content predication models based on a cow milk dielectric property and an establishment method thereof. In order to overcome the disadvantages of a traditional whey protein content measuring method and lay a foundation for development of a quick, efficient, accurate and online milk quality detection instrument, the mutual relation of the cow milk whey protein content and dielectric parameters (namely relative dielectric constant and dielectric lose factor) of milk whey protein is researched based on the cow milk radio frequency / microwave dielectric property, and the cow milk whey protein content predication models are established on the basis of the mutual relation. The two whey protein content predication models based on the cow milk dielectric property are provided, and the establishment method of the models is given. Verification results show that determination coefficients of the two models reach to 0.998 and 0.997 respectively. The new method is provided for related instrument development, and has the characteristics of high speed, high efficiency, accuracy and online measurement.

Description

technical field [0001] The invention belongs to the technical field of food detection, and in particular relates to a method for predicting bovine whey protein content based on dielectric properties. Background technique [0002] Milk whey protein is an important protein extracted from milk. Because of its high nutritional value, easy digestion and absorption, and containing a variety of active ingredients, it is known as the king of protein and is recognized as one of the high-quality protein supplements for the human body. With the continuous deepening of research on whey protein, its application has become more and more extensive, and it has become the main raw material of infant formula milk powder and sports health food. [0003] The rapid detection of the total protein content of milk and the content of casein and whey protein is an urgent problem to be solved in the field of dairy safety. The determination of whey protein content in milk and other dairy products pla...

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Problems solved by technology

[0004] At present, the traditional determination methods of whey protein content in milk mainly include high performance liquid chromatography, capillary electrophoresis and polyacrylamide gel electrophoresis. Shortcomings such as fast online detection

In addition, due to heat denaturation of whey protein, temperature and other factors, there are major errors in the detection of whey protein in my country at present.

In 2012, Abbott’s milk powder fell into the “quality gate” incident, which shows that the current whey protein determination method stipulated by my country’s national standard may underestimate whey protein by about 5%~15%

The new national standard for whey protein content has the embarrassing problem that there are indicators but no testing standards

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