Fast Determination of Protein in Milk and Dairy Products Using Protein Fast Analyzer

A rapid analyzer for the determination of protein were developed.The effects of experimental parameters,including temperature,time,and foreign substances were investigated.Several milk and dairy products were analyzed using the protein fast analyzer.The experimental results showed that protein reagent can react with protein within 1 min at room temperature.The whole process of protein determination in dairy products only takes 5-10 min.The protein fast analyzer was applied to the determination of protein in dairy products,the relative error is lower 5% compared to Kjeldahl method and standard amount method of protein in milk power.The relative standard deviation is lower 1%.The determination results of protein were not affected by foreign substances,such as melamine,urea,glycine,ammonium nitrate and so on.