Determination of polyphenols in beer
The presence of polyphenols in beer can cause off flavours and unwanted turbidity. This phenomenon can be reduced by treatment with PVPP (Polyvinylpolypyrrolidone) during boiling or maturation, before filtration.
With CDR BeerLab® it is possible to determine the total polyphenols in a simple and fast way directly in the brewery, following its evolution throughout the brewing process.
In this way, CDR BeerLab® allows optimal processing of polyphenol removal treatment with PVPP.
Method
Test Principle
Polyphenols are placed in contact with a colored complex in an alcoholic solution and oxidized, discoloring the complex. Discoloration, measured at 630 nm (end-point), is directly proportional to the concentration of polyphenols in the sample, expressed in mg/L.
Calibration curve
The CDR BeerLab® method has a good correlation with the official EBC 9.11 method.
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Reagent test Kits
Measuring range
| Analyses | Measuring range | Resolution | Repeatability |
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The Analyzers for process and quality control in beer brewing
CDR BeerLab®
- 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)
CDR BeerLab® Jr
- Partial analysis panel, supplied configured with 3 analyses of your choice, implementable
- Up to 3 determinations simultaneously
- Wireless connection to external printer
- USB connections