Determination of colour (Tonality and Intensity) in Wine and Must

CDR WineLab analysis system fast, simple to use and reliable for determining multiple parameters in wine and mustThe chromatic features of a wine are defined by two analytical parameters: tonality and intensity Through appropriate mathematical formulas, calculating the absorbance of the wine at 420nm, 520nm and 620nm, is possible to determine intensity and tonality value in wine. These two elements, which represent “the chromatic profile”, change with the evolution of wine and they show the quality and the “health” of wine.

The Analyzers CDR WineLab® for determining Colour (tonality and intensity) in 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 untill 18 months
The analytical methods are simple: the system does not require an equipped laboratory or skilled staff.

  CDR WineLab wine analyzer CDR WINELAB®  CDR WineLab wine analyzer Junior VersionCDR WINELAB® JUNIOR
Analyses Fermentable Sugars
Total Acidity
Acetic Acid
L-Lactic Acid
L-Malic Acid
Malolactic Fermentation
Alcohol
Free sulfur dioxide (Free SO2)
Total sulfur dioxide (Total SO2)
pH
Yeast assimilable nitrogen (YAN)
Gluconic Acid
Glycerol
Polyphenols
TPI – Total Polyphenols Index
Acetaldehyde (Ethanal)
Anthocyanins
Catechins
Colour intensity and tonality
Copper
Configuration with tailored panel of analyses
Simultaneous Sample Analyses 16 3
Multiple Analyses on a Sample si

Method

Test type: End Point.
Time testing: one test 1 minute – 80 Test/Hour.
Are possible test sessions with several samples, up to a maximum of 16.

Calibration curve

Comparative tests, carried out by Italian ISVEA laboratory, have shown an excellent correlation on the entire measure range with the reference method

Correlation with CDR WineLab and Referrence Method about Wine Colour Intensity and Tonality

Test Principle

Readings of absorbance at 420 nm, 520 nm and 620 nm are made on wine (sample as is) pre-vialed into the cuvettes. The instrument automatically calculates the tonality (according to the formula Abs 420 nm/Abs 520) and the intensity (according to the formula Abs 420 nm + Abs 520 nm + Abs 620 nm). The innovative CDR method makes the standard procedure easier and faster. The special photometric technology together with the provided cuvettes, enable to reach higher optical densities compared to normal spectrophotometers obviating the problems of sample dilution.

Reagent test Kits

Code. 230063 : 10 empty cuvettes for 10 tests

NB Chemical reagents are not requiered for the determination of the parameters.

Processing – Sample Volume – Measuring Range

Wine: use as is.

Curve Parameter Absorbance range Resolution
(mg/L di Cyanidin 3-O glucoside)
Repeatability
Colour Intensity 1,0 -40,0 0,001 0,002
Colour Tonality 0,001 0,002

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

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Colour (tonality and intensity) was last modified: May 23rd, 2017 by CDR s.r.l.