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 test for determining the concentration of soaps in oil and fat.

Method

Test type: End Point.
Testing time: 1 minute.
Analysis sessions with multiple samples are possible up to a maximum of 16 tests for CDR FoodLab® and 3 tests for CDR FoodLab® Junior.

Sample treatment

Oil: use as is (extracted from dry fruits, seeds, nuts, etc.).
Solid fats: melted using bain-marie method before starting the test (animal fats, palm oil, etc.).
Extractable fats: extract the fatty part following the instructions provided in the test method (butter, cream, margarine, semi-finished products, etc.).

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, because it enables the test to be carried with micro-quantities and to be applied to fats that are difficult to extract.

Calibration Curve

CDR method shows a very good correlation with Official Method NGD C8-1976.

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Reagent test Kits

Code *300175: 100 test
Code *300183: 20 test
The reagents have a shelf-life of 12 months

Measuring range

AnalysesMeasuring rangeResolutionRepeatability
Soaps [50-1350] ppm50 - 1350 ppm1 ppm38 ppm
Soaps [100-3000] ppm100 - 3000 ppm1 ppm77 ppm
Soaps [1-300] ppm1 - 300 ppm1 ppm9 ppm

The analyzers for oils and fats quality control

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CDR FoodLab®

Top
  • 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

Junior
  • Partial analysis panel, customisable configuration
  • Up to 3 determinations simultaneously
  • Wireless connection to external printer
  • USB connections
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