EN ISO 13161:2015

SLOVENSKI STANDARD
01-februar-2016
Kakovost vode - Merjenje koncentracije aktivnosti polonija Po-210 v vodi z alfa
spektrometrijo (ISO 13161:2011)
Water quality - Measurement of polonium 210 activity concentration in water by alpha
spectrometry (ISO 13161:2011)
Wasserbeschaffenheit - Bestimmung der Aktivitätskonzentration von Polonium-210 in
Wasser mittels Alphaspektrometrie (ISO 13161:2011)
Qualité de l'eau - Mesurage de l'activité du polonium 210 dans l'eau par spectrométrie
alpha (ISO 13161:2011)
Ta slovenski standard je istoveten z: EN ISO 13161:2015
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 13161
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2015
EUROPÄISCHE NORM
ICS 13.060.60; 17.240
English Version
Water quality - Measurement of polonium 210 activity
concentration in water by alpha spectrometry (ISO
13161:2011)
Qualité de l'eau - Mesurage de l'activité du polonium Wasserbeschaffenheit - Bestimmung der
210 dans l'eau par spectrométrie alpha (ISO Aktivitätskonzentration von Polonium-210 in Wasser
13161:2011) mittels Alphaspektrometrie (ISO 13161:2011)
This European Standard was approved by CEN on 27 September 2015.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13161:2015 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 13161:2011 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 13161:2015
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 April 2016, and conflicting national standards shall be
withdrawn at the latest by April 2016.
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,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 13161:2011 has been approved by CEN as EN ISO 13161:2015 without any modification.
INTERNATIONAL ISO
STANDARD 13161
First edition
2011-10-01
Water quality — Measurement of
polonium 210 activity concentration in
water by alpha spectrometry
Qualité de l’eau — Mesurage de l’activité du polonium 210 dans l’eau
par spectrométrie alpha
Reference number
ISO 13161:2011(E)
©
ISO 2011
ISO 13161:2011(E)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
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Published in Switzerland
ii © ISO 2011 – All rights reserved

ISO 13161:2011(E)
Contents Page
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and units . 1
3.1 Terms and definitions . 2
3.2 Symbols, definitions and units . 2
4 Principle . 2
4.1 General . 2
4.2 Treatment . 3
4.3 Principle of alpha spectrometry . 3
5 Reagents and equipment . 3
5.1 Reagents . 3
5.2 Preparation material and treatment . 4
5.3 Alpha spectrometry measuring equipment . 4
6 Sampling and samples . 4
7 Chemical treatment and deposit process . 4
7.1 General . 4
7.2 Chemical treatment . 5
7.3 Disc cleaning . 5
7.4 Deposition phase . 5
8 Measurement by alpha spectrometry . 6
8.1 General . 6
8.2 Quality control . 6
8.3 Measurement . 6
9 Expression of results . 6
9.1 General . 6
9.2 Total yield . 7
9.3 Activity concentration of Po in the sample . 7
9.4 Combined uncertainties . 8
9.5 Decision threshold . 8
9.6 Detection limit . 8
9.7 Confidence limits . 9
10 Test report . 9
Annex A (informative) Cell deposit examples . 11
Annex B (informative) Spectrum examples .13
Bibliography .15
ISO 13161:2011(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
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International
Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
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 bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 13161 was prepared by Technical Committee ISO/TC 147, Water quality, Subcommittee SC 3,
Radiological methods.
iv © ISO 2011 – All rights reserved

ISO 13161:2011(E)
Introduction
There are different techniques to measure Po activity concentration in water: alpha spectrometry, liquid
scintillation counting, alpha proportional counting.
This International Standard describes a method for measuring Po activity concentration in natural waters
by alpha spectrometry.
Polonium 210 ( Po) is a natural alpha-emitting radionuclide with a half-life of 138 d. It appears in the natural
238 222
chain of uranium 238 ( U) (see Figure 1). It is a long-life decay product of radon 222 ( Rn) through lead 210
( Pb) (see References [5] to [9]).
Precautions are required when manipulating radioactive materials such as polonium isotopes.
The activity concentration ranges of Po, in drinking waters for example, are generally very low, usually
�1 �1
ranging from 1 mBq l to 30 mBq l .
This International Standard is applicable to all types of water, including sea water, and usually allows the
210 �1
measurement of Po activity concentrations greater or equal to 5 mBq l .
NOTE Pb is stable.
Figure 1 — Uranium 238 and its decay products
© ISO
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