Amino nitrogen determination

Amino nitrogen measurement is an essential analysis for assessing the content of free or combined amino acids in a given matrix. These compounds play a key role in nutrition, metabolism, and the quality of food or nutraceutical products. Amino nitrogen measurement is also used as an indicator of fermentation and maturation in various food processing processes, for example in the production of wine, beer, dairy products, or fortified flours.

Analytical methods used

This analysis is based on different technical approaches:

• colorimetric methods based on reaction with ninhydrin or other reagents,
• HPLC after derivatization providing accurate quantification of individual amino acids,
• UV-Vis spectrophotometry used for rapid and standardized measurements.

Affected matrices

The determination of amino nitrogen applies to a wide variety of matrices such as raw or processed foodstuffs, plant and animal raw materials, extracts from industrial fermentation, animal feed or nutritional supplements.

Industrial and nutritional applications

In the animal nutrition sector, this parameter is monitored to assess the nutritional value of fodder and formulations.
In human nutrition and nutraceuticals, it is used to control protein quality and amino acid bioavailability.
Finally, it is used as a fermentation marker in winemaking or brewing, where the availability of assimilable nitrogen determines yeast activity and the final quality of the product.

YesWeLab expertise

At YesWeLab, we work with a network of specialized partner laboratories, ISO 17025 certified and often COFRAC accredited. Our team selects the most appropriate analytical method based on your needs, matrices, and regulatory requirements. You benefit from reliable, interpretable, and directly usable results.

Additional analyses

The amino nitrogen assay can be supplemented by other analytical services such as the amino acid assay, the total Kjeldahl nitrogen (NTK) assay, the protein assay or even fermentation analysis.

Why choose YesWeLab?

Since 2020, YesWeLab has been supporting food, animal nutrition, and nutraceutical manufacturers with their analytical needs. Thanks to our digital platform, you can order your analyses, track your samples, and view your results easily and securely.

Contact our scientific team today for any specific requests regarding amino nitrogen dosing.