Hydrogen peroxide (8.8mol/L) and sulphuric acid mixture (4:1,V:V) was used as digesting reagent. Samples were analyzed by methylaldehyde method. It turned out that the digesting time was reduced from six hours to thirty minutes and the results were basically the same as those of kj'eldhl method (for nitrogen determination). It can be concluded that the present method is both fast and simple. It can be used to measure the protein content in milk.
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