Research On The Standard Equation Of Quick Measurement Of Milk Protein With The Method Of Laser

In this paper, we theoretically and experimentally researched the standard equation of measurement technique of the concentration of protein in milk through laser scattering theory.In the milk, there are two kinds of large scattering molecules: fat and protein. It is impossible to find a kind of dissolution liquor which can dissolve fat quickly, only protein existing. So, we must measure the protein in milk with fat directly. Using the single frequency light to measure the protein in milk directly is vacant internationally. Based on the theorem of Beer, We establish correlative scattering model of fat and protein in milk. The ratio of scattering light intensity to transmitting light intensity is utilized to express measured optical parameters. The standard equation of measuring concentration of protein in milk is obtained through linear regression analysis of the model. The effect of different milk dilution ratio on measurement of concentration of protein is also studied and the optimized range of milk dilution ratio is given. In addition, we analyzed the factors influencing the number of sample of determining a reliable standard equation. The results provide theoretical and technical instruction of establishing reliable standard equation. Without isolating protein from milk, we can directly measure the protein in milk, adopting the prior method, that is to say, completely realizing the quickly accurate measurement of protein in milk. It is a significantly meaningful breakthrough of theory and technique. Furthermore, we bring prosperity for the field of measuring multi-ingredient in milk through light scattering theory. Also, the research field of measuring multi-ingredient can be based on this theory.Our country's milk industry is very backward comparable to the developed nation. The detect of milk quality is one of the most fragile part. From these, we can say that the successful development of quickly measuring instrument of protein in milk will make great contributionfor promoting the progress of our country's milk industry and improving milk quality. It would have widen market prosperity, huge economy and social profit. Especially, the instrument will be great meaningful for enhancement of international competence of our country's milk industry.