The polyphenols are a very broad class of compounds whose electronic spectra have an absorption peack at 280nm. The photometric reading at 280nm is then proportional to the amount of the polyphenols present in wine or must sample.
The Analyzers CDR WineLab® for determining Total Polyphenols Index 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® |
 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) Gluconic Acid Acetaldehyde (Ethanal) pH Total Polyphenols Index Glycerol Colour (tonality and intensity) Total Polyphenols Total Anthocyanins Polymerised Anthocyanins HCl Index Tannins Catechins Copper |
Configuration with tailored panel of analyses |
| Simultaneous Sample Analyses | 16 | 3 |
| Multiple Analyses on a Sample |  |
– |
Method
Test type: End Point.
Testing time: one test 11 minute.
Test sessions with several samples are possible, up to a maximum of 16.
Calibration curve
The calibration curve of CDR WineLab®, obtained using reference methods, confirms the excellent linearity of the system over the whole testing range.
Test Principle
Photometric reading at 280 nm
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. *300495: 10 tests
Code. *300505: 100 tests (10 packages of 10 tests)
The reagents have a shelf-life of 12 months
Processing – Sample Volume – Measuring Range direction
Use the wine as is or centrifuged must.
| Test | Measuring range (280nm) |
Resolution (280nm) |
Repeatability (280nm) |
|---|---|---|---|
| TPI | 1.0 – 100.0 D.O. | 0.1 OD | 0.4 OD |
