Quantitative Bestimmung von Phosphonaten in Waschmitteln

Abstract

The selective determination of phosphonates in detergents with ion chromatography is disturbed by the presence of Al or other metal ions. Due to the formation of stable metal-phosphonate complexes, phosphonate is linked and thus a determination is not possible. The disturbance caused by Al^III can be eliminated by adding a competing agent to the analyte solution.