Determination of Total sulfur dioxide (SO2) in Beer

CDR BeerLab is the easy, fast and reliable testing system to be used directly at the brewery with no need of expertise in chemical analysisCDR BeerLab® allows to determine Total sulfur dioxide (SO2) in beer giving the result in 1 minute, avoiding the time consuming distillation of the EBC reference method and the using of dangerous and cancerogenic compounds used by AOCS reference method.

You can use CDR BeerLab® method easily in the QC lab or even at production line.

SO2 is naturally produced in the fermentation steps of beer production. Given its antioxidant capacity it allows to extend the shelf life of the beer itself . The legal limit is 10 mg/L.

The systems to test Total sulfur dioxide (SO2) in beer

Bitterness levels can be measured using CDR BeerLab®, a system which enables you to carry out a wide panel of chemical analyses on beer and water, using a single instrument, in a process that is faster and simpler than traditional methods.
With CDR BeerLab® brewers and breweries of any size can independently carry out brewing process controls without having to rely on external laboratories.

  CDR BeerLab: chemical analysis system specifically designed to monitor the brewing process  in breweryCDR BEERLAB® CDR BeerLab Junior: chemical analysis system specifically designed to monitor the brewing process  in breweryCDR BEERLAB® JUNIOR
Analyses Beer and Wort:

Bitterness (IBU)
Fermentable Sugars
Alcohol by Volume (ABV)
Acetic acid
Yeast Vitality
Vicinal Diketons (VDKs)
Total sulfur dioxide
Free Amino Nitrogen by OPA (FAN)
Lactic Acid (D + L)
Polyphenols in beer
Alkalinity of water
Bicarbonate in Water
Calcium in Water
Zinc in Water
Sulfate in Water
Magnesium in Water
Potassium in Water
Chloride in Water

Configuration with tailored panel of analyses

Simultaneous Sample Analyses 16 3
Multiple Analyses on a Sample si


Test type: End Point.
Time testing: 1 minute.
Are possible test sessions with several samples, up to 16 for CDR BeerLab® and 3 tests for CDR BeerLab® Junior.

Calibration curve

Calibration curve obtained with samples of known values.

Total Sulfur Dioxide test Calibration - CDR BeerLab


Test Principle

Total SO2 reacts with a specific cromogen forming a compound used to follow the reaction itself. The end point of the reaction is read at 430nm and the increasing of absorbance is proportional to the total SO2 concentration.

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.

  • Codice *300865 – The kit, designed for 10 tests
  • Codice *300860 – The kit, designed for 100 tests

The reagents have a shelf-life of 18 months.

Processing – Sample Volume – Measuring Range

Collect the beer after a short degassing step

Analysis Measuring range Resolution Repeatability
Total sulfur dioxide (SO2) 1 – 30 ppm
0.1 ppm 0.2 ppm

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

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Total sulfur dioxide was last modified: February 19th, 2019 by CDR s.r.l.