Boiler water for use in the production of beer and other foods
Analogous to the p and m values obtained in the determination of acid capacity (pH 8.2 and 4.3), this analysis is performed according to W-000.13.031 Acid Consumption (Alkalinity, p-Value and m-Value)/Acid Capacity to pH of 8.2 and/or 4.3 for Water. The alkaline capacity of the boiler water is determined through titration of the sample with 0.1 N sodium hydroxide (instead of hydrochloric acid) to a pH of 4.3 and/or 8.2.
This method describes how to determine the capacity for water imbibition (moisture uptake) in barley.
Barley intended for the production of malt is evaluated on the basis of its capacity for water imbibition.
Barley is steeped according to a defined scheme, and the absorption of the steeping liquor by the kernels at defined times is determined by calculating the moisture content. The moisture content after 72 h steeping time is used to assess the absorption of steeping liquor or the capacity for water imbibition in barley.
This method describes the general requirements for boiler feed water:
Boiler feed water for use in the production of beer and other foods
The requirements for boiler feed water are detailed in the analysis methods listed below.
Boiler feed water for use in the production of beer and other foods
Copper forms a complex with sodium diethyldithiocarbamate with a maximum absorption at 436 nm.
If the copper content is high, turbidity will result. In such cases, the water sample must be diluted. The method is suitable for water with a copper content up to 1 mg/l. An extraction must be performed in order to determine extremely low concentrations of copper.
This method describes how to determine the iron content of boiler feed water. Iron can cause surface deposits to develop.
Boiler feed water for use in the production of beer and other foods
Fe(III) ions form a complex with sulfosalicylic acid, which is red in an acidic solution and yellow in an alkaline solution. Since Fe(II) ions are oxidized in an alkaline solution, they are detected as well. In this way, the value for total iron can be measured.
This method describes how to determine the pH of boiler feed water using non-bleeding pH indicator strips.
The pH of boiler feed water is determined using non-bleeding pH indicator strips.