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® 
Analyses Wine and Must:
Alcohol by Volume
Acetic acid (volatile acidity)
Fermentable Sugars
Total Acidity
L-Lactic Acid
L-Malic Acid
Free sulfur dioxide
Total sulfur dioxide
Yeast Assimilable Nitrogen (YAN)
Galacturonic Acid
Gluconic Acid
Acetaldehyde (Ethanal)
Total Polyphenols Index
Colour (tonality and intensity)
Total Polyphenols (Folin Ciocalteu)
Anthocyanins Extraction on Grapes
Total Anthocyanins
Polymerised Anthocyanins
HCl Index
Simultaneous Sample Analyses 16
Multiple Analyses on a Sample si


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 Repeatability
Colour Intensity (I=O.D.420+O.D.520+O.D.620) 0,0-40,0 O.D. 0,001 O.D. 0,1 O.D
Colour Tonality (T=O.D.420/O.D.520) 0,001 O.D. 0,05 O.D.

Reagents developed by CDR S.r.l - Quality System Certified ISO 9001 Ed. 2015 - Certificate n. 9115

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With the CDR system, you can perform your tests in total autonomy

Neither skilled staff nor a dedicated external laboratory is needed to use our systems. CDR FoodLab® optimizes traditional testing methods, making them faster and easier, while guaranteeing accuracy standards in line with the reference methods.

Analytical kit

CDR FoodLab® Analysis Systems use disposable pre-vialed reagents specifically developed by the research laboratories of CDR. The use of pre-vialed reagents and the analytical procedures allow:

  • a sample preparation that is quick and easy, when needed at all;
  • making analytical procedures extremely fast and easy;
  • removing all needs for complex calibration procedures.

Reagents come in aluminum packages containing 10 test tubes each to perform 10 tests (or packages for 100 tests containing 10 single packages of 10 test tubes each).

Just a few steps and results are yielded right away

Just a few steps will suffice to carry out your analysis in a rapid way in total autonomy. The system is composed of both the analyzer based on photometric technology and a kit of low toxicity, pre-vialed reagents, developed by CDR.

CDR FoodLab® is cost-effective because it does not require the use of expensive equipment and does not entail maintenance, assistance or calibration costs.
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