CDR FoodLab® is the chemical analyzer for quality and process control that allows you to determine a wide range of parameters of many foods, animal feeds and pet foods.

Milk Urea Nitrogen test

The 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.

Method

Test principle

Reaction involved in the analysis of urea in milk

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

Measuring range

AnalysesMeasuring rangeResolutionRepeatability

Analyzers for quality control of milk and dairy products

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CDR FoodLab®

  • Complete analysis panel, supplied already configured
  • Up to 16 determinations simultaneously
  • Possibility of carrying out analyses of the same sample
  • Integrated printer
  • Full connections (LAN - USB - Bluetooth barcode/QR code reader)
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CDR FoodLab® Jr

  • Partial analysis panel, supplied configured with 3 analyses of your choice, implementable
  • Up to 3 determinations simultaneously 
  • Wireless connection to external printer
  • USB connections