Total Polyphenols Index

CDR CiderLab: the analysis system for cider to perform quality and process controlsThe 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 cider.

The Analyzers CDR CiderLab for determining Total Polyphenols Index in cider

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 CiderLab wine analyzer CDR CiderLab CDR WineLab<sup>®</sup> wine analyzer Junior VersionCDR CiderLab JUNIOR
Analyses Fermentable Sugars
Total Acidity
Acetic Acid
L-Lactic Acid
L-Malic Acid
Free sulfur dioxide (Free SO2)
Total sulfur dioxide (Total SO2)
Yeast assimilable nitrogen (YAN)
TPI – Total Polyphenols Index
Configuration with tailored panel of analyses
Simultaneous Sample Analyses 16 3
Multiple Analyses on a Sample si


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 CiderLab, obtained using reference methods, confirms the excellent linearity of the system over the whole testing range.

Correlation to the reference method of Total Polyphenols Index analysis with CDR CiderLab in cider

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: The kit, designed for 10 tests
Code *300505: The kit, designed for 100 tests

The reagents have a shelf-life of 12 months.

Processing – Sample Volume – Measuring Range direction

Use the cider as is or centrifuged juice.

Test Measuring range
Resolution (280nm)  Repeatability (280nm) 
TPI 2 – 100 OD 0.1 OD 0.4 OD

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

Click and Discover more about CDR CiderLab: analysis system fast, simple to use and reliable for determining multiple parameters in cider

Total Polyphenols Index was last modified: December 30th, 2018 by CDR s.r.l.