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 legal limit.
The CDR WineLab® method does not require any electrode, neither any maintenance or calibration.
Method
Sample treatment
Degas the wine sample by using the specific ultrasonic bath (code 222062). In case of tests performed on must, the sample shall be centrifuged (code 222061) or filtered (code 300210).
Principle of the test
pH measures the dissociation grade of acids present in wine or must. The pH is determined through a colorimetric acid-base reaction in which a phenolic derivative, by the addition of wine or must, undergoes a discoloration. The discoloration, measured at 630 nm (end-point), is directly proportional to the pH.
Calibration curve
The calibration curve of CDR WineLab®, obtained using reference methods, confirms the excellent linearity of the system over the whole testing range.
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Reagent test Kits
Code*300310: 10 tests
Measuring range
| Analyses | Measuring range | Resolution | Repeatability |
|---|---|---|---|
| pH | 3 - 4 | 0.01 | 0.02 |
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® Jr
Partial analysis panel, customisable configuration
Up to 3 determinations simultaneously
Wireless connection to external printer
USB connections