EN 903:1993

Water quality - Determination of anionic surfactants by measurement of the methylene blue index MBAS (ISO 7875-1:1984 modified) EN 903:1993

Publication date:   Mar 19, 2004

General information

90.93 Standard confirmed   Feb 9, 2022


CEN/TC 230 Water analysis

European Norm

13.060.20   Drinking water



Language in which you want to receive the document.


Under the experimental conditions, sulfonates and sulfates are the compounds chiefly measured, but some positive and negative interferences can occur (see clause 10). The method is applicable to drinking water, surface water as well as waste water, e.g. for the determination of the primary degradation of surfactants being under investigation in test systems containing natural or synthetic waste water. This applies for both laboratory scaled and technical waste water treatment plants.

Life cycle


EN 903:1993
90.93 Standard confirmed
Feb 9, 2022


Adopted from ISO 7875-1:1984 MODIFIED