CDR DrinkLab is a quick, reliable and easy analysis system for the quality and process control of the beverage sector

Determination of Lactic Acid (D + L) in Kefir

Monitoring lactic acid is important for both artisanal and industrial kefir producers, as it helps ensure consistent quality and a reliable product. Measuring lactic acid allows you to monitor the degree of fermentation, which affects the slightly sour taste and texture of this drink.

Method

Sample treatment

The sample must be centrifuged (code 222061) before the analysis. Dilute the sample if required by the method.

Principle of the test

D-lactic acid and L-lactic acid are oxidized through an enzymatic reaction to pyruvic acid with the consequent production of NADH. The increase in absorbance, measured at 366 nm in end-point, is proportional to the concentration of lactic acid in the sample. The result is expressed in ppm.

Calibration curve

The calibration curve was made using samples with known lactic acid value (L+D). The trend of the curve confirms the excellent linearity of the system over the entire measurement range.

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Reagent test Kits

Measuring range

AnalysesMeasuring rangeResolutionRepeatability

The perfect system for you

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CDR DrinkLab

  • 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)