Why Kjeldahl Nitrogen Analyzer Also Called Protein Analyzer?

Kjeldahl nitrogen analyzer is an instrument that calculates the protein content by measuring the nitrogen content in the sample based on the principle of constant nitrogen content in protein. Kjeldahl nitrogen analyzer uses the Kjeldahl method to detect the content of ammonia, protein nitrogen, phenol, volatile fatty acid, cyanide, sulfur dioxide, ethanol, etc. in grains, food, feed, water, soil, sludge, sediment and chemicals. It is widely used in the analysis of nitrogen or protein content in food, crops, seeds, soil, fertilizers and other samples.
The industry insiders are all very familiar with Kjeldahl nitrogen analyzer. The equipment belongs to the basic equipment, and is commonly used in many manufacturing industries. But Kjeldahl nitrogen analyzer also has another name, protein analyzer. The two names are quite different. So why is Kjeldahl nitrogen analyzer also called protein analyzer?
Kjeldahl nitrogen analyzer is named according to its basic principle of measurement. Because its protein content measurement and calculation method is the classic Kjeldahl method, it is called Kjeldahl nitrogen analyzer. The Kjeldahl method was established in 1833 by the American chemist Kedal, and it is a way to measure the total nitrogen content in chemical substances or compounds, and the protein moisture content can be calculated based on the measured nitrogen content. It is often called protein analyzer, because the measurement target of Kjeldahl nitrogen analyzer is mostly to calculate the protein moisture content in the sample based on the measured nitrogen content, so the name is based on the main purpose. That is why Kjeldahl nitrogen analyzer is also called protein analyzer.
Although their names are different, the two are actually the same instrument and equipment.The protein analyzer is an important instrument for measuring the protein in the sample, and is widely used in the measurement of protein moisture content in grains and soil layers, and also often commonly used in many manufacturing industries. The universal applicability, accuracy and repeatability of the Kjeldahl method have been broadly recognized internationally.