Standardized extraction process with potassium hydrogen phthalate at pH 4.0 for use with filter media/filter aids.
Suitable for all common filter media/filter aids.
Elements (cations) from filter media/filter aids are extracted for determination using AAS, ICP-OES or ICP-MS at a pH 4.0.
This method describes how to determine the acid consumption or acid capacity of water.
Water intended for use as an ingredient in the production of beer (brewing liquor) or other foods
This method describes how to determine the amount of carbon dioxide dissolved or chemically bound in water.
Water intended for use as an ingredient in the production of beer (brewing liquor) or other foods
If a water sample is run through a strongly acidic cation exchanger, all of the cations are replaced with hydrogen ions, thus producing the corresponding free acids in equivalent quantities (total mineral acid value). Since the carbonates and bicarbonates are transformed into carbon dioxide and therefore escape determination, their content must be determined through titration with acid to a pH of 4.3 (m value).
This method describes how to calculate the concentration of sodium and potassium ions in water.
Since analyses for determining the concentrations of sodium and potassium ions in water require considerable effort, and these ions are not very relevant for evaluating the suitability of water for the processes of brewing and malting, a simple calculation will suffice. The difference in the concentrations of anions and cations in the water is determined, allowing the calculation to be performed under the assumption that only sodium ions are present in the water.
Determination of hydrogen peroxide (H2O2) in disinfectants.
Suitable for all solutions that contain hydrogen peroxide (H2O2) but do not contain any other peroxides.
The quantitative determination is carried out in a sulphuric acid solution by titration with potassium permanganate:
5 H202 + 2 KMnO4 + 3 H2S04 → 2 MnSO4 + H2S04 + 8 H20 + 5 02
If the sample contains other peroxide-containing disinfectants in addition to hydrogen peroxide (H2O2), the method T-754-01-032 Peracetic-acid-based-disinfectants must be used.