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.

Analysis of L-Lactic acid in milk and dairy products

Lactic acid is produced by the fermentation of lactose mainly through microbial activity. Its concentration depends on the total bacterial count and can be a useful indicator of the good state of preservation. In addition, the heat treatment at high temperatures, such as UHT milk, reduces the microbial load but does not alter the concentration of lactic acid, which thus becomes an indicator of the “history” of the product. The test can also be run on derivatives in powder (whey, milk, additives) after reconstitution in water.

Method

Test principle

Reaction involved in the analysis of lactic acid in milk and dairy products

L-Lactic acid is oxidized to pyruvate by an enzymatic reaction that produces H2O2. H2O2, in the presence of peroxidase and a phenolic derivate, forms a colored complex whose intensity was read at 545nm and is directly proportional to the concentration of L-lactic acid in the sample.

Calibration curve

Comparative tests on samples of whole milk between the reference method and the CDR FoodLab® method, performed in a leading company in production of milk, confirmed a very good alignment between the two systems.

Lactic acid analysis in milk and dairy products with the CDR FoodLab® analysis method: correlation curve with the reference method. R² = 0.9975

Reagent test kits

Milk and Cream

Ricotta, Mozzarella and Yogurt

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
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