This method describes the determination of the negative p-value and m-value of boiler feed water. The concentration of mineral acids (negative m-value) is particularly significant in those cases when mineral acids have been released through treatment of the boiler feed water using a strongly acidic cation exchanger.
boiler feed water for use in beer and food production
Analagous to the acid consumption to 8.2 and/or 4.3, the determination 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 feed 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.