Determination of the soluble iron content of filter aids. A collaborative trial

Submitted on behalf of the Analysis Committee of the European Brewery Convention

Abstract

The International Method for the determination of the soluble iron content of filter aids has been collaboratively tested by members of the Analysis Committee of the European Brewery Convention to obtain repeatability (r₉₅) and reproducibility (R₉₅) values. It was judged that precision values were dependent on the quantity of the soluble iron content of the filter aids over the range 32 to 220 mg/kg. Repeatability (r₉₅) value of 0.050 m and reproducibility value (R₉₅) of 0.255 m were obtained over this range.