Milk Urea Nitrogen test

The chemical analysis of the milk and dairy products for quality control for every stage of the production chain with CDR FoodLabThe urea content in raw milk is related to the amount of protein in the animal feeding and allows you to define an adequate diet. This analysis also helps to identify any additions of urea in milk, introduced in order to increase, fraudulently, the protein content of milk.

Features of Milk Urea Nitrogen (MUN) test in milk and dairy products

Analyzers for determining Milk Urea Nitrogen (MUN) in milk and dairy products


  CDR FoodLab for performing a range of tests in milk and a variety of dairy products CDR FOODLAB® CDR FoodLab Junior for performing a range of tests in milk and a variety of dairy products CDR FOODLAB® JUNIOR
Analyses Milk and Dairy Products:

L-Lactic acid
Milk Urea Nitrogen (MUN)
Alkaline phosphatase (ALP)
Hydrogen peroxide
ε-fructosyl-lisine (Furosine)
Free Fatty Acids
Peroxide Value
Configuration with tailored panel of analyses
Simultaneous Sample Analyses 16 3
Multiple Analyses on a Sample si


Test method

Test type: End Point
Time of test: 3 minutes
It is possible to carry out several test sessions with a maximum of 16 samples.

Test principle

Urea + der. Fenolico ureasi a blue-green colored complex
The urea is converted into ammonia by urease enzyme. The ammonium ions react with a phenolic derivative and form a blue-green colored complex whose intensity, measured at 700 nm, is directly proportional to the concentration of urea in the sample.

Calibration curve

Comparative tests, on samples of whole milk performed between the reference method (differential pH-metry instrument – EFA Instrument) and the FoodLab method, made in “Laboratorio Standard Latte” of the AIA (Italian Breeders Association) have confirmed a very good alignment between the two systems

urea in milk - CDR FoodLab method vs reference method


Reagent test Kits 

The reagents are packaged in foil pouches containing 10 tubes useful to perform 10 analyses.

This is the minimum package that allows the use of CDR systems even to those who need to make a few analyses, thus not wasting reagents.

There are also boxes of 100 tests, however, packaged in 10 bags of 10 tubes containing the reagent.

Reagent test kit *300000 suitable for 100 tests

Reagent test kit *300004 suitable for 10 tests

The reagents have a shelf-life of 12 months.

Processing – Sample Volume – Measuring Range

Use milk as is.

Measuring range
(mg/dL urea)
(mg/dL urea)
5 – 100 0,1 0,5 mg d/L

Reagents developed by CDR S.r.l - Quality System Certified ISO 9001 Ed. 2015 - Certificate n. 9115

Click and Discover more about CDR FoodLab®: Tests in few minutes, reference methods compliant. Easy to use also by unskilled staff

Milk Urea Nitrogen (MUN) was last modified: March 7th, 2019 by CDR s.r.l.