Monitoring and assay of water treatment additives by alternating current tensammetry and voltammetry: scope and limitations

Abstract

The alternating current (a.c.) tensammetric behaviour of different commercially available water treatment additives is described. Possibilities and limitations of their routine determination by a.c. tensammetry at low levels (0.5–10 ppm) in different aqueous media are discussed. Indirect differential-pulse voltammetry via the 12-molybdophosphate derivative allows a classification between phosphino-containing and phosphorus-free water treatment compounds. Practical examples are given.