Nitrogen/Protein: Almost all food and animal feed contains nitrogen / protein. The protein content is calculated from the percentage of nitrogen determined in a sample, and it is a key criterion for the quality and price of a product. This means that this analysis is very important to the food and animal feed industry. Gerhardt offer two methods to define nitrogen/protein.
Use the links below to find more information.
The method of Kjeldahl: http://www.oleinitec.se/products-a-z/kjeldahl-destillation/
The method of Dumas: http://www.oleinitec.se/products-a-z/dumas-combustion/