The must always contains relatively high doses of copper deriving from downy mildew treatments. It is well known that excess copper is reduced during the fermentation process. Sometimes the copper level can low down too low levels, especially in white wines. This low copper concentration can lead the reduction problems that can arise, to the opening of the bottle, the typical reduction off-flavour bringing serious commercial problems to the bottle producer.
The Analyzers CDR WineLab® for determining Copper 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® |
 CDR 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 |  |
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Method
Test type: End Point.
Time testing: one test 6 minutes.
Analysis sessions with multiple samples up to a maximum of 16 are possible.
Calibration Curve
The calibration curve of the CDR WineLab® instrument was made using standard copper solutions. The curve obtained confirmed an excellent linearity of the system on both measurement ranges
Test Principle
The copper content is determined by its reaction with a chromogen which develops a colour change, whose optical intensity measured at 620nm, is proportional to the copper concentration in the sample analyzed.
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 *300577: 10 tests
Code *300575: 100 tests
The reagents have a shelf-life of 6 months
Processing Sample
If necessary, the sample shall be degassed using the specific ultrasonic bath (code 222062). In case of tests performed on must, the sample shall be first centrifuged (code 222061).
Measuring Range
| Test | Measuring Range | Resolution | Repeatability |
|---|---|---|---|
| Copper [0.05-0.70] ppm | 0.05 - 0.7 ppm | 0.01 ppm | 0.04 ppm |
| Copper [0.6-1.20] ppm | 0.6 - 1.2 ppm | 0.01 ppm | 0.09 ppm |
