Analysis of water alkalinity

CDR BeerLab is the easy, fast and reliable testing system to be used directly at the brewery with no need of expertise in chemical analysis

Alkalinity is probably the most important parameter for beer producers as it has a direct effect on the mash. The value of alkalinity is closely linked to the style of beer that the brewer aims to produce. This parameter is therefore fundamental for achieving the sensory qualities sought.

Total alkalinity is defined as the concentration of strong acid, measured in milliequivalents per litre, needed to convert bicarbonate or carbonate in the sample in carbon dioxide at a pH of 4.3.

With CDR BeerLab® it is possible to determine alkalinity easily and quickly without using glassware or laboratory material, by means of a photometric reading.

The systems to test Alkalinity of water used in brewing process

Chloride levels in the water used in the brewing process 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)
Colour
Starch
pH
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

Method

Test type: End Point.
Time testing: 10 minutes.
Are possible test sessions with several samples, up to 16 for CDR BeerLab® and 3 for Junior CDR BeerLab®

Correlation curve

The correlation/calibration curve was constructed using the reference method of potentiometric titration.

Correlation curve of the determination of water alkalinity obtained with the reference method of potentiometric titration

Test Principle

The alkaline components of water react with a specific reagent leading to the formation of an adduct which absorbs at the wavelength of 366nm. The absorbency of the sample is directly proportional to the alkalinity value.

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 *300985 – The kit, designed for 10 tests
  • Codice *300980 – The kit, designed for 100 tests

The reagents have a shelf-life of 12 months.

Processing Sample

Use water as is.

Measuring Range

Analysis Measuring range Resolution Repeatability
Alkalinity of Water 5-600 mg/L 1 mg/L 11 mg/L

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

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Alkalinity of water was last modified: March 21st, 2019 by CDR s.r.l.