CDR FoodLab® - Sistema di analisi per alimenti 1

Determination of pH in wine

CDR WineLab® allows to determine the pH in wine and must thanks to a colorimetric reaction, whose results are correlated to the OIV results, based on an electrochemical reaction.

This parameter influences the vinification and conservation of wine. The range of pH value is approximately 3.00 – 4.00, even if there is no a legal limit.

The CDR WineLab® method does not require any electrode, neither any maintenance or calibration.


Test Principle

pH measures the dissociation grade of acids present in wine or must. It is determined with wine or must. The discoloration, measured at 630 nm (end-point), is directly proportional to the pH.

The pH is determined through an acid-base colorimetric reaction in which a phenolic derivative, by adding wine or must, undergoes a discoloration. The level of this discoloration, measured at 630 nm, is related to the pH of the sample.

Calibration curve

The calibration curve of CDR WineLab® for determination of pH in wine, obtained using reference methods, confirms the excellent linearity of the system over the whole testing range.

CDR WineLab® method correlation with the reference method of pH in wine and must. R² = 0.9627

Reagent test Kits

Measuring range

AnalysesMeasuring rangeResolutionRepeatability

Analyzers for process and quality control in winemaking


CDR WineLab®

  • 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 WineLab® Junior

  • Pannello di analisi parziale, fornito configurato con 3 analisi a scelta, implementabile
  • Fino a 3 determinazioni in contemporanea
  • Collegamento wireless a stampante esterna
  • Connessioni USB