Urea dosage

Urea is an organic compound containing nitrogen, naturally produced by protein metabolism in living organisms. It is also synthesized on a large scale for agricultural, industrial, and cosmetic uses. Its presence and concentration are important indicators, whether for formulation quality control, product safety, or nitrogen input management in animal and agricultural sectors.

Urea measurement is essential for assessing the non-protein nitrogen content in various products. In fertilizers, it helps verify the effectiveness and compliance of crop inputs. In animal nutrition, it is used to adjust formulations and optimize ration digestibility. Finally, in cosmetics, urea is recognized as a powerful moisturizing agent, and its measurement is necessary to validate the compliance of creams, lotions, and dermatological treatments.

Analytical methods
Several approaches are used to quantify urea:

• HPLC (high performance liquid chromatography), suitable for complex matrices and precise dosages.
• Enzymatic methods, based on the action of urease, are commonly used in routine analyses.
• Colorimetric methods, fast and economical, suitable for frequent checks.

These techniques guarantee high reliability and can be chosen according to the matrix, the required sensitivity and the industrial context.

Matrices concerned
The dosage of urea is applicable to different types of products:

• Moisturizing cosmetics (creams, lotions, dermatological care)
• Agricultural products (solid and liquid fertilizers)
• Animal feed and nutritional supplements
• Industrial preparations containing non-protein nitrogen

Industrial applications

• Cosmetics : control of urea content in formulations to guarantee moisturizing effectiveness and avoid dosage deviations.
• Agriculture : validation of nitrogen content in fertilizers to optimize yields and ensure regulatory compliance.
• Animal health : evaluation of urea as a non-protein nitrogen source in animal feed, enabling optimization of ration formulation.
• Chemical industry : monitoring the quality of batches of synthetic urea used in various applications.

Additional analyses
The urea dosage can be supplemented by other analyses in order to obtain a more complete view of the products:

• Total protein measurement to assess overall nutritional quality.
• Amino nitrogen assay to characterize amino acid intake.
• Determination of free amino acids in nutritional matrices.

Regulations and quality
The dosage of urea is governed by quality and safety standards depending on the sector of application. In agriculture, the nitrogen content of fertilizers must comply with European regulations. In cosmetics, the maximum concentration allowed in care products is regulated to ensure consumer safety. In the field of animal nutrition, urea intake recommendations must be respected to avoid any risk of metabolic imbalance.

YesWeLab Expertise
YesWeLab collaborates with a network of specialized laboratories, most of which are ISO 17025 certified and COFRAC accredited. Each request is directed to the most suitable laboratory based on the matrix, method, and sensitivity requirements. Our digital platform simplifies analysis management, from sample submission to centralized results reception.