EN ISO 11731-2:2008

Water quality - Detection and enumeration of Legionella - Part 2: Direct membrane filtration method for waters with low bacterial counts (ISO 11731-2:2004)

ISO 11731-2:2004 describes a monitoring method for the isolation and enumeration of Legionella organisms in water intended for human use (e.g. hot and cold water, water used for washing), for human consumption and for treated bathing waters (e.g. swimming pools). It is especially suitable for waters with prospected low numbers of Legionella. As the growth of Legionella may be inhibited by overgrowth of other bacterial colonies on the membrane the method is only suitable for waters containing low bacterial.

Wasserbeschaffenheit - Nachweis und Zählung von Legionellen - Teil 2: Direktes Membranfiltrationsverfahren mit niedriger Bakterienzahl (ISO 11731-2:2004)

Dieser Teil von ISO 11731 beschreibt ein Kontrollverfahren zur Isolierung und Zählung von Legionellen in Wasser für den menschlichen Gebrauch (z. B. Heiß  und Kaltwasser, Waschwasser), Trinkwasser und aufbereitetem Badebeckenwasser (z. B. Schwimmbeckenwasser). Das Verfahren ist besonders für Wasser mit einer voraussichtlich niedrigen Anzahl von Legionellen geeignet. Da das Wachstum von Legionellen auf der Membran durch Überwachsen mit anderen Bakterien beeinträchtigt sein kann, ist das Verfahren nur für Wasser mit niedriger Bakterienzahl geeignet.

Qualité de l'eau - Recherche et dénombrement des Legionella - Partie 2: Méthode par filtration directe sur membrane pour les eaux à faible teneur en bactéries (ISO 11731-2:2004)

L'ISO 11731:2004 décrit une méthode de contrôle pour l'isolation et le dénombrement des Legionella dans l'eau destinée à des usages (par exemple eau chaude ou froide, eau utilisée pour le lavage), dans l'eau destinée à la consommation humaine et dans les eaux de baignade traitées (par exemple eaux de piscines). Cette méthode s'applique en particulier aux eaux à faible teneur en Legionella. La croissance des Legionella peut être inhibée par la croissance excessive d'autres colonies bactériennes sur la membrane; par conséquent, la méthode n'est applicable qu'aux eaux à faible teneur en bactéries.

Kakovost vode - Ugotavljanje prisotnosti in števila legionel - 2. del: Metoda neposredne membranske filtracije za vode z majhnim številom bakterij (ISO 11731-2:2004)

General Information

• Status: Withdrawn
• Publication Date: 18-Mar-2008
• Withdrawal Date: 06-Jun-2017
• ICS: 07.100.20 - Microbiology of water
• Technical Committee: CEN/TC 230 - Water analysis
• Drafting Committee: CEN/TC 230 - Water analysis
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 07-Jun-2017
• Ref Project: SIST EN ISO 11731-2:2008 - Water quality - Detection and enumeration of Legionella - Part 2: Direct membrane filtration method for waters with low bacterial counts (ISO 11731-2:2004)

Relations

• Replaced By: EN ISO 11731:2017 - Water quality - Enumeration of Legionella (ISO 11731:2017)
• Effective Date: 14-Jun-2017

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 11731-2
First edition
2004-05-01


Water quality — Detection and
enumeration of Legionella —
Part 2:
Direct membrane filtration method for
waters with low bacterial counts
Qualité de l'eau — Recherche et dénombrement des Legionella —
Partie 2: Méthode par filtration directe sur membrane pour les eaux à
faible teneur en bactéries




Reference number
ISO 11731-2:2004(E)
©
ISO 2004

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ISO 11731-2:2004(E)
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ii © ISO 2004 – All rights reserved

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ISO 11731-2:2004(E)
Contents Page
Foreword. iv
1 Scope. 1
2 Normative references . 1
3 Terms and definitions. 1
4 Safety. 2
5 Principle . 2
6 Culture media and reagents. 2
7 Apparatus . 6
8 Sampling . 7
9 Procedure . 7
10 Expression of results. 9
11 Test report . 9

© ISO 2004 – All rights reserved iii

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ISO 11731-2:2004(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
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International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bo
...

SLOVENSKI STANDARD
SIST EN ISO 11731-2:2008
01-julij-2008
Kakovost vode - Ugotavljanje prisotnosti in števila legionel - 2. del: Metoda
neposredne membranske filtracije za vode z majhnim številom bakterij (ISO 11731-
2:2004)
Water quality - Detection and enumeration of Legionella - Part 2: Direct membrane
filtration method for waters with low bacterial counts (ISO 11731-2:2004)
Wasserbeschaffenheit - Nachweis und Zählung von Legionellen - Teil 2: Direktes
Membranfiltrationsverfahren mit niedriger Bakterienzahl (ISO 11731-2:2004)
Qualité de l'eau - Recherche et dénombrement des Legionella - Partie 2: Méthode par
filtration directe sur membrane pour les eaux à faible teneur en bactéries (ISO 11731-
2:2004)
Ta slovenski standard je istoveten z: EN ISO 11731-2:2008
ICS:
07.100.20 Mikrobiologija vode Microbiology of water
SIST EN ISO 11731-2:2008 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN ISO 11731-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2008
ICS 07.100.20

English Version
Water quality - Detection and enumeration of Legionella - Part 2:
Direct membrane filtration method for waters with low bacterial
counts (ISO 11731-2:2004)
Qualité de l'eau - Recherche et dénombrement des Wasserbeschaffenheit - Nachweis und Zählung von
Legionella - Partie 2: Méthode par filtration directe sur Legionellen - Teil 2: Direktes Membranfiltrationsverfahren
membrane pour les eaux à faible teneur en bactéries (ISO mit niedriger Bakterienzahl (ISO 11731-2:2004)
11731-2:2004)
This European Standard was approved by CEN on 24 February 2008.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11731-2:2008: E
worldwide for CEN national Members.

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EN ISO 11731-2:2008 (E)
Contents Page
Foreword.3
Annex ZA (informative) A-deviations.4
2

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EN ISO 11731-2:2008 (E)
Foreword
The text of ISO 11731-2:2004 has been prepared by Technical Committee ISO/TC 147 “Water quality” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 11731-2:2008 by
Technical Committee CEN/TC 230 “Water analysis” the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by September 2008, and conflicting national standards shall be
withdrawn at the latest by September 2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 11731-2:2004 has been approved by CEN as a EN ISO 11731-2:2008 without any
modification.
3

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EN ISO 11731-2:2008 (E)
Annex ZA
(informative)

A-deviations
...