EN ISO 16265:2012 Water quality - Determination of the methylene blue active substances (MBAS) index - Method using continuous flow analysis (CFA) (ISO 16265:2009)
This International Standard specifies a procedure for the determination of the methylene blue activesubstances (MBAS) index, in the ranges 0,05 mg/l to 0,5 mg/l and 0,5 mg/l to 5,0 mg/l, in various watersamples (e.g. ground water, drinking water, surface water, waste water and leachates). Anionic surfactantsare the most important substances showing methylene blue activity.This method is therefore useful forestimating the anionic surfactant content [including anionic surfactants with carboxylate groups (e.g. soaps)] ofwater. Other types of substance may also show methylene blue activity and contribute to the result. On acase-by-case basis, the range of the analysis may be changed and the method used for other concentrationranges provided they cover exactly one decade of concentration units.
EN ISO 16265:2012 Referenced Document
ISO 1042 Laboratory glassware - One-mark volumetric flasks
ISO 3696 Water for analytical laboratory use; Specification and test methods
ISO 648 Laboratory glassware - Single-volume pipettes
EN ISO 16265:2012 history
2012EN ISO 16265:2012 Water quality - Determination of the methylene blue active substances (MBAS) index - Method using continuous flow analysis (CFA) (ISO 16265:2009)