Determination of the Galacturonic Acid in must and 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

Together with gluconic acid, uronic acids such as galacturonic acid and glucuronic acid are products that form in botrized grapes and that combine sulphur dioxide   therefore lowering the level of free SO2 with the same added metabisulphite. Knowing the concentration of these compounds, both in red and white wines, is therefore very important in order to establish the most suitable oenological protocol.

The Analyzers CDR WineLab® for determining Galacturonic Acid in Wine and Must

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® CDR WineLab wine analyzer Junior VersionCDR WINELAB® JUNIOR
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
Calcium
Copper
Catechins
Gluconic Acid
Acetaldehyde (Ethanal)
pH
Total Polyphenols Index
Glycerol
Colour (tonality and intensity)
Total Polyphenols (Folin Ciocalteu)
Anthocyanins Extraction on Grapes
Total Anthocyanins
Polymerised Anthocyanins
HCl Index
Tannins
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 4 minutes.
Analysis sessions with multiple samples up to a maximum of 16 are possible.

Calibration Curve

The calibration curve of the CDR WineLab® instrument, performed using standards with a known concentration of galacturonic acid, confirmed an excellent linearity of the system over the entire measurement range.

Galacturonic Acid CDR WineLab® Calibration Curve. R²=0,9998

Test Principle

Uronate dehydrogenase reacts with galacturonic and glucuronic acid to develop NADH, which is directly proportional to the concentration in the sample expressed in g/L.

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. *301045: 10 tests 

Code. *301040: 100 tests (10 packages of 10 tests)

The reagents have a shelf-life of 6 months.

Processing Sample

If necessary, the sample must be degassed using the specific ultrasonic bath (code 222062). In the case of tests carried out on must, the sample must be centrifuged (code 222061) or filtered (code 300210).

Measuring Range

Test Measuring range Resolution

Accuracy

Galacturonic Acid [0.03 – 0.50] 0.03 – 0.50 g/L 0.01 ppm 0.02 g/L
Galacturonic Acid [0.10 – 2.00] 0.10 – 2.00 g/L 0.01 ppm 0.04 g/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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