Analysis of water alkalinity
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® |
 CDR 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 |  |
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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.
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 |
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