EN ISO 13164-4:2023

Water quality - Radon-222 - Part 4: Test method using two-phase liquid scintillation counting (ISO 13164-4:2023)

This document describes a test method for the determination of radon-222 (222Rn) activity concentration in non-saline waters by extraction and liquid scintillation counting.
The 222Rn activity concentrations, which can be measured by this test method utilizing currently available instruments, are above 0,5 Bq·l−1 which is the typical detection limit for a 10 ml test sample and a measuring time of 1 h.
It is the responsibility of the laboratory to ensure the validity of this test method for water samples of untested matrices.
Annex A gives indication on the necessary counting conditions to meet the required detection limits for drinking water monitoring.

Wasserbeschaffenheit - Radon-222 - Teil 4: Verfahren mittels zweistufiger Flüssigszintillationszählung (ISO/FDIS 13164-4:2023)

Dieses Dokument beschreibt ein Prüfverfahren zur Bestimmung der Aktivitätskonzentration von Radon-222 (222Rn) in nicht salzhaltigen Gewässern durch Extraktion und Flüssigszintillationszählverfahren.
Die Radon-222-Aktivitätskonzentrationen, die mit diesem Verfahren unter Verwendung derzeit verfügba
rer Instrumente gemessen werden können, liegen über0,5Bq⋅l−1, was die typische Nachweisgrenze für eine10-ml-Analysenprobe und einen Messzeitraum von1h ist.
Es liegt in der Verantwortung des Labors, die Gültigkeit dieses Verfahrens für Wasserproben nicht geprüfter Matrizen sicherzustellen.
AnhangA enthält Angaben zu den erforderlichen Zählbedingungen, um die für die Trinkwasserüberwachung erforderlichen Nachweisgrenzen zu erreichen.
WARNUNG— Dieses Dokument erhebt nicht den Anspruch, alle Sicherheitsprobleme im Zusammen
hang mit seiner Verwendung zu behandeln. Es liegt in der Verantwortung des Arbeitgebers,
sene Sicherheits- und Schutzmaßnahmen zu treffen und sicherzustellen, dass diese mit nationalen Festlegungen übereinstimmen.
WICHTIG— Es ist unerlässlich, dass nach diesem Dokument durchgeführte Untersuchungen von ent
sprechend qualifiziertem Personal durchgeführt werden.

Qualité de l'eau - Radon 222 - Partie 4: Méthode d'essai par comptage des scintillations en milieu liquide à deux phases (ISO 13164-4:2023)

Le présent document spécifie une méthode d’essai permettant de déterminer l’activité volumique du radon 222 (222Rn) dans des eaux non salines par extraction et comptage des scintillations en milieu liquide.
Cette méthode d’essai permet de mesurer, à l’aide d’instruments actuellement disponibles, les valeurs d’activité volumique du 222Rn. Ces valeurs sont supérieures à 0,5 Bq l−1, c’est-à-dire la limite de détection typique pour une prise d’essai de 10 ml et un temps de comptage de 1 h.
Il incombe au laboratoire de s’assurer de la validité de la présente méthode d’essai pour les échantillons d’eau provenant de matrices non testées.
L’Annexe A précise les conditions de comptage nécessaires à l’obtention des limites de détection requises pour la surveillance de l’eau potable.

Kakovost vode - Radon Rn-222 - 4. del: Preskusna metoda s štetjem z dvofaznim tekočinskim scintilatorjem (ISO 13164-4:2023)

Standard ISO 13164-4:2015 opisuje preskusno metodo za določevanje koncentracije aktivnosti radona Rn-222 (222Rn) v neslanih vodah z ekstrakcijo in štetjem s tekočinskim scintilatorjem.
Koncentracije aktivnosti radona Rn-222, ki jih je mogoče izmeriti s to preskusno metodo in trenutno razpoložljivimi instrumenti, so vsaj nad 0,5 Bq l−1 za 10 ml preskusnega vzorca in čas merjenja 1 h.
Ta preskusna metoda se lahko uspešno uporablja pri vzorcih pitne vode, laboratorij pa mora zagotovi veljavnost te preskusne metode za vzorce vode nepreskušenih matric.
Dodatek A nakazuje potrebne pogoje štetja za izpolnjevanje zahtevanih meja zaznavanja za spremljanje stanja pitne vode.

General Information

• Status: Published
• Publication Date: 25-Jul-2023
• ICS: 13.060.60 - Examination of physical properties of water
• ICS: 13.280 - Radiation protection
• ICS: 17.240 - Radiation measurements
• Technical Committee: CEN/TC 230 - Water analysis
• Drafting Committee: CEN/TC 230 - Water analysis
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 26-Jul-2023
• Completion Date: 26-Jul-2023
• Ref Project: SIST EN ISO 13164-4:2023 - Water quality - Radon-222 - Part 4: Test method using two-phase liquid scintillation counting (ISO 13164-4:2023)

Relations

• Replaces: EN ISO 13164-4:2020 - Water quality - Radon-222 - Part 4: Test method using two-phase liquid scintillation counting (ISO 13164-4:2015)
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2023
Nadomešča:
SIST EN ISO 13164-4:2020
Kakovost vode - Radon Rn-222 - 4. del: Preskusna metoda s štetjem z dvofaznim
tekočinskim scintilatorjem (ISO 13164-4:2023)
Water quality - Radon-222 - Part 4: Test method using two-phase liquid scintillation
counting (ISO 13164-4:2023)
Wasserbeschaffenheit - Radon-222 - Teil 4: Verfahren mittels zweistufiger
Flüssigszintillationszählung (ISO 13164-4:2023)
Qualité de l'eau - Radon 222 - Partie 4: Méthode d'essai par comptage des scintillations
en milieu liquide à deux phases (ISO 13164-4:2023)
Ta slovenski standard je istoveten z: EN ISO 13164-4:2023
ICS:
13.060.60 Preiskava fizikalnih lastnosti Examination of physical
vode properties of water
17.240 Merjenje sevanja Radiation measurements
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 13164-4
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2023
EUROPÄISCHE NORM
ICS 13.060.60; 13.280; 17.240 Supersedes EN ISO 13164-4:2020
English Version
Water quality - Radon-222 - Part 4: Test method using
two-phase liquid scintillation counting (ISO 13164-
4:2023)
Qualité de l'eau - Radon 222 - Partie 4: Méthode d'essai
par comptage des scintillations en milieu liquide à
deux phases (ISO 13164-4:2023)
This European Standard was approved by CEN on 12 June 2023.

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-CENELEC 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-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13164-4:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 13164-4:2023) has been prepared by Technical Committee ISO/TC 147 "Water
quality" in collaboration with 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 January 2024, and conflicting national standards shall
be withdrawn at the latest by January 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 13164-4:2020.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 13164-4:2023 has been approved by CEN as EN ISO 13164-4:2023 without any
modification.
INTERNATIONAL ISO
STANDARD 13164-4
Second edition
2023-07
Water quality — Radon-222 —
Part 4:
Test method using two-phase liquid
scintillation counting
Qualité de l'eau — Radon 222 —
Partie 4: Méthode d'essai par comptage des scintillations en milieu
liquide à deux phases
Reference number
ISO 13164-4:2023(E)
ISO 13164-4:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 13164-4:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols . 1
3.1 Terms and definitions . 1
3.2 Symbols . 2
4 Principle . 3
5 Sampling . 3
5.1 General . 3
5.2 Sampling with source preparation “on site” . 3
5.3 Sampling without “on site” source preparation . 3
6 Reagents and apparatus . 3
6.1 Reagents . 3
6.2 Apparatus . 4
7 Procedure .4
7.1 Preparation of calibration sources . 4
7.2 Optimization of counting conditions . 4
7.3 Detection efficiency . 5
7.4 Blank sample preparation and measurement. 5
7.5 Sample preparation and measurement . 5
8 Quality assurance and quality control program . 6
8.1 General . 6
8.2 Variables that could influence the measurement . 6
8.3 Instrument verification . 6
8.4 Contamination . 6
8.5 Interference control . 7
8.6 Method verification . 7
8.7 Demonstration of analyst capability . 7
9 Expression of results . 7
9.1 General . 7
9.2 Count rate . 7
9.3 Calculation of activity concentration per unit of mass . 8
9.4 Combined uncertainty . 8
9.5 Decision threshold . 8
9.6 Detection limit . 9
9.7 Probabilistically symmetric coverage interval . 9
9.7.1 Limits of the probabilistically symmetric coverage interval . 9
9.7.2 The shortest coverage interval . 10
9.8 Calculations using the activity concentration . 10
10 Test report .10
Annex A (informative) Set-up parameters and validation data .12
Bibliography .16
iii
ISO 13164-4:2023(E)
Foreword
ISO (the International Organization for Standardization) is a worl
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