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.

Soaps test in Oils and Fats

Soaps are salts of fatty acids obtained from a reaction that occurs between free fatty acids and sodium carbonate. Thanks to their water solubility and insolubility in oil, they can be separated from fat through specific procedures. Food industries use this technique to lower fat acidity and to enhance its organoleptic characteristics. For such industries, it is important to carry out a chemical analysis for determining the concentration of soaps in oil and fat.

CDR FoodLab® method simplifies and speeds up the official procedure C8 NGD-1976 for testing the soaps in fats and, thanks to micro quantities used, allows to extend the analysis to samples of fat extraction is difficult.


Test principle

At specific pH values soaps mixed with bromphenol, generate a specific blue colour. Its intensity, measured at 604 nm, is directly proportional to the concentration of soaps in the sample. CDR innovative method simplifies and accelerates the standard procedure to testing soaps in oils and fats, because it enables the test to be carried with micro-quantities and to be applied to fats that are difficult to extract.

Calibration Curve

The method CDR FoodLab® for analyze the concentration of soaps in oils and fats shows a good correlation with the reference method NGD C8-1976

Correlation CDR FoodLab® with the reference method NGD C8-1976. R²=0.9998

Reagent test Kits

Measuring range

AnalysesMeasuring rangeResolutionRepeatability

The analyzers for oils and fats quality control


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)

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