prSRPS EN ISO 6461-2:2025

Water quality — Detection and enumeration of the spores of sulfite-reducing anaerobes (clostridia) — Part 2: Method by membrane filtration

General information

Current stage: 10.99 Effective date: May 2, 2025

Originator: ISS

Owner: H147

Type: European Norm

Languages: English

Scope

The procedure is applicable to all types of water, except when a large amount of particulate material is liable to be retained by the membrane. The principle covers several steps from selection by applying heat to destroy vegetative bacteria to filtration of the water sample through a membrane filter having a suitable pore size (0,2 µm) to retain the spores in or on it. The filter is placed on a selective culture medium, followed by incubation and counting of black colonies.

Life cycle

PREVIOUSLY

PUBLISHED
SRPS EN 26461-2:2009

NOW

PROJECT
prSRPS EN ISO 6461-2:2025
10.99 New project approved
May 2, 2025

prSRPS EN ISO 6461-2:2025

Water quality — Detection and enumeration of the spores of sulfite-reducing anaerobes (clostridia) — Part 2: Method by membrane filtration

General information

Scope

Life cycle

PREVIOUSLY

NOW

Related project

Adopted from prEN ISO 6461-2 rev IDENTICAL

Adopted from ISO/AWI 6461-2 IDENTICAL