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.

Determination of polyphenols in beer

CDR BeerLab® - simple, fast and reliable analysis system of beer.

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CDR BeerLab®

Test type: End Point.
Time testing: [uni].
Analysis sessions with multiple samples are possible up to a maximum of 4 tests for CDR BeerLab® and 3 tests for CDR BeerLab® Junior.

Method

Use on beer or wort. The beer sample needs to be degassed using the ultrasonic bath (code 222062) before taking the sample. For higher accuracy in the analysis of wort we recommend to centrifuge (code 222061) the sample.

Sample treatment

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.

Principle of the test

The calibration curve has been realized by using samples with known polyphenols values analyzed with the EBC 9.11 reference method. The tendency of the curve confirms the excellent linearity over the entire measurement range.

Calibration curve

The calibration curve of the CDR BeerLab® total polyphenol analysis obtained using samples with known values of polyphenols analyzed with the reference method EBC 9.11. R² = 0.9304

Code*301330: 100 tests Code*301335: 10 tests <div class='font-bold'>The reagents have a shelf-life of 12 months</div>

Reagent test Kits

<table class='table-auto'><tbody><tr style='border-bottom-width: 1px; border-color:#e4e9f2;'><th style='padding: .75rem 1.5rem .75rem 0; text-align: left;'>Analyses</th><th style='padding: .75rem 1.5rem .75rem 0; text-align: left;'>Measuring range</th><th style='padding: .75rem 1.5rem .75rem 0; text-align: left;'>Resolution</th><th style='padding: .75rem .75rem .75rem 0; text-align: left;'>Repeatability</th></tr><tr><td style='padding: .75rem 1.5rem .75rem 0; text-align: left;'>Polyphenols</td><td style='padding: .75rem 1.5rem .75rem 0; text-align: left;'>50 - 450 mg/L</td><td style='padding: .75rem 1.5rem .75rem 0; text-align: left;'>1 mg/L</td><td style='padding: .75rem .75rem .75rem 0; text-align: left;'>16 mg/L</td></tr></tbody></table>

Measuring range

CDR BeerLab® the beer analyzer, Junior version

CDR BeerLab® Jr

The Analyzers for process and quality control in beer brewing

 Polyphenols in beer

Oils and fats

Frying oils and fried snacks

Fish Oil

Olive oil

Palm oil

Bakery products and spreads

Nuts

Milk and dairy products

Egg products

Tomato derivatives

Vinegar

Food

Wine

Cider

Kombucha

Coffee Fermentation

Green coffee, roasted coffee and beverage

Water for coffee preparation

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Soft Drinks

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Fruit Juices

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Plant-based Beverages 

Kefir

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