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ISO 16265:2009

Water quality — Determination of the methylene blue active substances (MBAS) index — Method using continuous flow analysis (CFA)

Mar 3, 2009

General information

90.60     Mar 5, 2025

ISO

ISO/TC 147/SC 2

International Standard

13.060.50  

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Published

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Scope

ISO 16265:2009 specifies a procedure for the determination of the methylene blue active substances (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 water samples (e.g. ground water, drinking water, surface water, waste water and leachates). Anionic surfactants are the most important substances showing methylene blue activity. This method is therefore useful for estimating the anionic surfactant content [including anionic surfactants with carboxylate groups (e.g. soaps)] of water. Other types of substance may also show methylene blue activity and contribute to the result. On a case-by-case basis, the range of the analysis may be changed and the method used for other concentration ranges provided they cover exactly one decade of concentration units.

Life cycle

PREVIOUSLY

ABANDON
ISO/DIS 16265-1

ABANDON
ISO/DIS 16265-2

NOW

PUBLISHED
ISO 16265:2009
90.60 Close of review
Mar 5, 2025

National adoptions

SRPS EN ISO 16265:2013  
ISS

Water quality - Determination of the methylene blue active substances (MBAS) index - Method using continuous flow analysis (CFA) (ISO 16265:2009)

60.60   Standard published

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