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Created on Wednesday, 06 March 2013 16:28

Determination of pH in wine

With WineLab is possible to determine pH in wine with a colorimetric method whose results are correlated to the results of the OIV method which is based on an electrochemical measuring.

WineLab method, that does not require the use of any probe, does not need maintenance or calibration.

Analyzer

winelab-120lWineLab: analyses for wine and must
The system is supplied pre-calibrated and ready for use.
Results are expressed in accordance with the reference method.
It is also possible to standardize the system using samples with a known titration.
The reagents have a shelf-life of 12 months.
The analytical methods are simple: the system does not require an equipped laboratory or skilled staff.
It has been validated by the Istituto per lo Sviluppo Viticolo Enologico ed Agroindustriale (ISVEA) – Institute for the Winegrowing, Winemaking and Agro-industrial Development – which is accredited with ACCREDIA

Method

Test type: End Point.
Colorimetric reaction at 630 nm.
Time testing: one test 1 minute - 80 Test/Hour.
Are possible test sessions with several samples, up to a maximum of 14.
It is also possible to standardize the system using samples with a known value.

Calibration curve

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

Determination of Ph In Wine Reference Method



Composition of the Kit and Reagents

Code *300310: The kit, designed for 10 tests, comprises:
1) R1: pre-filled cuvettes with reagent.

Test Principle

pH measures the dissociation grade of acids present in wine. This parameter influences the vinification and conservation of wine. The range of pH value is approximately 3.00 – 4.00. There is not any legal limit.

pH is determined through acid-base colorimetric reaction in which a phenol derivative, for addition of wine, undergoes a decoloration. The entity of this decoloration, measured at 630nm, is correlated to pH in the sample.

Processing - Sample Volume - Measuring Range

 

Wine: use as is.

TestMeasuring range
(pH)
Sample volumeResolution
(g/L of acetic acid)
Accuracy
pH 3,00 - 4,00 50 µL 0,01 +/- 5%

Reagent developed by CDR S.r.l - ISO 9001 certified company



 
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