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

How to perform the Urea test on Milk. Take a look

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)
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: 8 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

The Poligny ACTALIA (France) reference laboratory, specialising in food analysis, performed an evaluation study: The analysis of urea on milk was performed with CDR FoodLab® and with the reference method in differential metric pH (NF EN ISO 14637). The correlation between the CDR FoodLab® method and the reference method is excellent (R 2 = 0.9887) considering the type of analysis and the difficulty of performing the reference method.

The analysis of urea on milk was performed with CDR FoodLab® and with the reference method in differential metric pH (NF EN ISO 14637). The correlation R2 = 0.9887

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.


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.

Code *300000: 100 tests

Code *300004: 10 tests

The reagents have a shelf-life of 12 months

Processing Sample 

Use milk as is.

Measuring Range

Test Measuring Range Resolution Repeatability
Urea 5 - 100 mg/dL 0.1 mg/dL 1.2 mg/dL
MUN 2.5 - 50 mg/dL 0.1 mg/dL 0.6 mg/dL

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

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With the CDR system, you can perform your tests in total autonomy

Neither skilled staff nor a dedicated external laboratory is needed to use our systems. CDR FoodLab® optimizes traditional testing methods, making them faster and easier, while guaranteeing accuracy standards in line with the reference methods.

Analytical kit

CDR FoodLab® Analysis Systems use disposable pre-vialed reagents specifically developed by the research laboratories of CDR. The use of pre-vialed reagents and the analytical procedures allow:

  • a sample preparation that is quick and easy, when needed at all;
  • making analytical procedures extremely fast and easy;
  • removing all needs for complex calibration procedures.

Reagents come in aluminum packages containing 10 test tubes each to perform 10 tests (or packages for 100 tests containing 10 single packages of 10 test tubes each).

Just a few steps and results are yielded right away

Just a few steps will suffice to carry out your analysis in a rapid way in total autonomy. The system is composed of both the analyzer based on photometric technology and a kit of low toxicity, pre-vialed reagents, developed by CDR.

CDR FoodLab® is cost-effective because it does not require the use of expensive equipment and does not entail maintenance, assistance or calibration costs.
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