CDR WineLab® the reliable, complete and fast system of wine analyses

Determination of TPI - Total Poliphenols Index in wine and must

The polyphenols are a very broad class of compounds whose electronic spectra have an absorption peack at 280 nm. The photometric reading at 280 nm is then proportional to the amount of the polyphenols present in wine or must sample.

Method

Test type: End Point.
Time testing: 10 minutes
Analysis sessions with multiple samples are possible up to a maximum of 16 tests for CDR WineLab®.

Sample treatment

Wine is analyzed as it is. If necessary (sparkling or fermenting wine), the sample shall be degassed using the specific ultrasonic bath (code 222062). In case of tests performed on must, the sample shall be centrifuged (code 222061) or filtered (code 300210).

Test Principle

The wine sample is dissolved in an appropriate solvent and the absorbance of the solution is read at 280 nm.

Calibration curve

The calibration curve of CDR WineLab®, obtained using reference methods, confirms the excellent linearity of the system over the whole testing range.

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Reagent test kits

Code *300495: 10 test
Code *300505: 100 test
The reagents have a shelf-life of 12 months

Measuring Range

AnalysesMeasuring rangeResolutionRepeatability
TPI red150 - 3000 mg/L gallic acid1 mg/L gallic acid65 mg/L gallic acid
TPI white2 - 300 mg/L gallic acid1 mg/L gallic acid7 mg/L gallic acid

The Analyzer for process and quality control in winemaking

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CDR WineLab®

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  • Complete analysis panel, supplied already configured
  • Up to 16 determinations simultaneously
  • Possibility of carrying out analyses of the same sample
  • Integrated printer
  • Full connections (LAN - USB - Bluetooth barcode/QR code reader)
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