Determination of the Catechins in Wine

CDR WineLab® is the fast, simple and reliable wine analysis system to be used right in the winery with no need of qualified personnel in the field of chemical assays

Catechins are colorless phenolic compounds belonging to the group of flavan-3-oils or flavanols, which are present in numerous woody plants including the grapes. In particular the catechins are present in the skin of the grapes. These compounds are responsible of the taste and other properties, including color.

The color of white wines, in fact, depends on the oxidation state of the phenolic compounds contained.

The Analyzers CDR WineLab® for determining Catechins in Wine

The system is supplied pre-calibrated and ready for use.
Results are expressed in accordance with the reference method.
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 10 minutes.
Analysis sessions with multiple samples up to a maximum of 16 are possible.

Calibration Curve

The calibration curve of the CDR WineLab® instrument, carried out comparing to the reference method, confirmed an excellent linearity of the system over the entire measurement range.

Catechins in Wine CDR WineLab® Calibration Curve. R²=0.9987

Test Principle

The test is based on the reading of the absorbance at 280nm, that is related to the absorbance of the catechins contained in the sample, diluted in a proper buffer.

Reagent test Kits

The reagents are packaged in foil pouches containing 10 tubes useful to perform 10 analyses.

This is the minimum package that allows the use of CDR systems even to those who need to make a few analyses, thus not wasting reagents.

There are also boxes of 100 tests, however, packaged in 10 bags of 10 tubes containing the reagent.

Code *300593: 10 tests

Code *300590: 100 tests

The reagents have a shelf-life of 12 months

Processing Sample

Wine: Use as is. If necessary degass the sample with proper ultrasonic bath (code 222062).

Measuring Range

Test Measuring Range Resolution Repeatability
Catechins on wine 1 - 30 mg/L 0.1 mg/L 0.7 mg/L

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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