SIST EN ISO 13165-2:2020
(Main)Water quality - Radium-226 - Part 2: Test method using emanometry (ISO 13165-2:2014)
Water quality - Radium-226 - Part 2: Test method using emanometry (ISO 13165-2:2014)
ISO 13165-2:2014 specifies the determination of radium-226 (226Ra) activity concentration in all types of water by emanometry. The method specified is suitable for the determination of the soluble, suspended, and total 226Ra activity concentration in all types of water with soluble 226Ra activity concentrations greater than 0,02 Bq l−1. In water containing high activity concentrations of 228Th, interference from 220Rn decay products can lead to overestimation of measured levels.
Wasserbeschaffenheit - Radium 226 - Teil 2: Untersuchungsverfahren mittels Emanometrie (ISO 13165-2:2014)
Dieser Teil von ISO 13165 legt die Bestimmung der Aktivitätskonzentration von Radium 226 (226Ra) in allen Arten von Wasser mittels Emanometrie fest.
Das beschriebene Verfahren eignet sich zur Bestimmung der Gesamtaktivitätskonzentration von löslichem, suspendiertem 226Ra in allen Arten von Wasser mit löslichen 226Ra Aktivitätskonzentrationen von mehr als 0,02 Bq l−1.
In Wasser mit hohen Aktivitätskonzentrationen von 228Th können Störungen durch220Rn Zerfallsprodukte zur Überbewertung der gemessenen Stände führen (siehe Bild A.2).
Qualité de l'eau - Radium 226 - Partie 2: Méthode d'essai par émanométrie (ISO 13165-2:2014)
L'ISO 13165-2:2014 spécifie la détermination de l'activité volumique du radium 226 (226Ra), dans tous types d'eaux par émanométrie.
La méthode spécifiée est applicable pour la détermination de l'activité volumique du 226Ra soluble, total et particulaire dans tous types d'eaux d'activité volumique en 226Ra supérieure à 0,02 Bq l−1.
Dans les eaux fortement chargées en 228Th, l'interférence due aux descendants du 220Rn peut conduire à une surestimation des niveaux mesurés.
Kakovost vode - Radij Ra-226 - 2. del: Preskusna metoda z emanometrijo (ISO 13165-2:2014)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 13165-2:2020
01-maj-2020
Kakovost vode - Radij Ra-226 - 2. del: Preskusna metoda z emanometrijo (ISO
13165-2:2014)
Water quality - Radium-226 - Part 2: Test method using emanometry (ISO 13165-
2:2014)
Wasserbeschaffenheit - Radium 226 - Teil 2: Untersuchungsverfahren mittels
Emanometrie (ISO 13165-2:2014)
Qualité de l'eau - Radium 226 - Partie 2: Méthode d'essai par émanométrie (ISO 13165-
2:2014)
Ta slovenski standard je istoveten z: EN ISO 13165-2:2020
ICS:
13.060.60 Preiskava fizikalnih lastnosti Examination of physical
vode properties of water
17.240 Merjenje sevanja Radiation measurements
SIST EN ISO 13165-2:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN ISO 13165-2:2020
---------------------- Page: 2 ----------------------
SIST EN ISO 13165-2:2020
EN ISO 13165-2
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2020
EUROPÄISCHE NORM
ICS 13.060.60; 17.240
English Version
Water quality - Radium-226 - Part 2: Test method using
emanometry (ISO 13165-2:2014)
Qualité de l'eau - Radium 226 - Partie 2: Méthode Wasserbeschaffenheit - Radium 226 - Teil 2:
d'essai par émanométrie (ISO 13165-2:2014) Untersuchungsverfahren mittels Emanometrie (ISO
13165-2:2014)
This European Standard was approved by CEN on 6 October 2019.
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, Turkey 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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13165-2:2020 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 13165-2:2020
EN ISO 13165-2:2020 (E)
Contents Page
European foreword . 3
2
---------------------- Page: 4 ----------------------
SIST EN ISO 13165-2:2020
EN ISO 13165-2:2020 (E)
European foreword
The text of ISO 13165-2:2014 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 13165-
2:2020 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 August 2020, and conflicting national standards shall
be withdrawn at the latest by August 2020.
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.
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, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 13165-2:2014 has been approved by CEN as EN ISO 13165-2:2020 without any
modification.
3
---------------------- Page: 5 ----------------------
SIST EN ISO 13165-2:2020
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SIST EN ISO 13165-2:2020
INTERNATIONAL ISO
STANDARD 13165-2
First edition
2014-04-15
Water quality — Radium-226 —
Part 2:
Test method using emanometry
Qualité de l’eau — Radium 226 —
Partie 2: Méthode d’essai par émanométrie
Reference number
ISO 13165-2:2014(E)
©
ISO 2014
---------------------- Page: 7 ----------------------
SIST EN ISO 13165-2:2020
ISO 13165-2:2014(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2014
All rights reserved. Unless otherwise specified, 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
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 13165-2:2020
ISO 13165-2:2014(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 . 2
5 Reagents and equipment . 3
5.1 Reagents. 3
5.2 Equipment . 3
6 Sampling and storage . 4
6.1 Sampling . 4
6.2 Sample storage . 4
7 Procedures . 4
7.1 Sample preparation . 4
7.2 Measurement conditions . . 5
7.3 Counting procedure . 5
8 Quality assurance and quality control programme . 5
8.1 General . 5
8.2 Influence parameters . 5
8.3 Instrument verification and calibration . 6
8.4 Method verification . 6
8.5 Demonstration of analyst capability . 6
9 Expression of results . 6
226
9.1 Activity concentration of water-soluble Ra . 6
9.2 Standard uncertainty of activity concentration . 7
9.3 Limits of the confidence interval . 8
9.4 Example . 8
10 Test report . 8
Annex A (informative) Decay chains of uranium-238 and thorium-232.10
Annex B (informative) Bubbler .12
Annex C (informative) Glass scintillation cell .14
Bibliography .15
© ISO 2014 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 13165-2:2020
ISO 13165-2:2014(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 147, Water quality, Subcommittee SC 3,
Radioactivity measurements.
ISO 13165 consists of the following parts, under the general title Water quality — Radium-226:
— Part 1: Test method using liquid scintillation counting
— Part 2: Test method using emanometry
The following parts are under preparation:
— Part 3: Test method using coprecipitation and gamma spectrometry
iv © ISO 2014 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 13165-2:2020
ISO 13165-2:2014(E)
Introduction
Radioactivity from several naturally occurring and human-made sources is present throughout the
environment. Thus, water bodies (surface waters, ground waters, sea waters) can contain radionuclides
of natural and human-made origins:
Natural radionuclides, including potassium-40, and those of the thorium and uranium decay series, in
particular radium-226, radium-228, uranium-234, uranium-238, and lead-210, can be found in water for
natural reasons (e.g. desorption from the soil and wash-off by rain water) or releases from technological
processes involving naturally occurring radioactive materials (e.g. the mining and processing of mineral
sands or phosphate fertilizer production and use).
Human-made radionuclides such as transuranium elements (americium, plutonium, neptunium, curium),
tritium, carbon-14, strontium-90, and some gamma emitters radionuclides can also be found in natural
waters as they can be authorized to be routinely released into the environment in small quantities in the
effluent discharge from nuclear fuel cycle facilities and following their use in unsealed form in medicine
or industry. They are also found in the water due to the past fallout of the explosion in the atmosphere
of nuclear devices and those following the Chernobyl and Fukushima accidents.
Drinking water can thus contain radionuclides at activity concentration which could present a risk to
human health. In order to assess the quality of drinking water (including mineral waters and spring
waters) with respect to its radionuclide content and to provide guidance on reducing health risks by
taking measures to decrease radionuclide activity concentrations, water resources (groundwater, river,
lake, sea, etc.) and drinking water are monitored for their radioactivity content as recommended by the
World Health Organization (WHO).
The need of a standard on a test method of radium-226 activity concentrations in water samples is
justified for test laboratories carrying out these measurements, required sometimes by national
authorities, as they may have to obtain a specific accreditation for radionuclide measurement in drinking
water samples.
Radium-226 activity concentration can vary widely according to local geological and climatic
−1 −1
characteristics and ranges from 0,001 Bq l in surface waters up to 50 Bq l in natural groundwaters.
−1
The guidance level for radium-226 in drinking water as recommended by WHO is 1 Bq l (see
Reference [11]).
NOTE The guidance level is the activity concentration (rounded to the nearest order of magnitude) with an
-1 -1
intake of 2 l∙d of drinking water for 1 year that results in an effective dose of 0,1 mSv∙y for members of the
public, an effective dose that represents a very low level of risk that is not expected to give rise to any detectable
adverse health effect.
This International Standard is one of a series on determination of the activity concentration of
radionuclides in water samples.
© ISO 2014 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 13165-2:2020
---------------------- Page: 12 ----------------------
SIST EN ISO 13165-2:2020
INTERNATIONAL STANDARD ISO 13165-2:2014(E)
Water quality — Radium-226 —
Part 2:
Test method using emanometry
WARNING — Persons using this document should be familiar with normal laboratory practice.
This document does not purport to address all of the safety problems, if any, associated with its
use. It is the responsibility of the user to establish appropriate safety and health practices and to
ensure compliance with any national regulatory conditions.
IMPORTANT — It is absolutely essential that tests conducted in accordance with this document
be carried out by suitably qualified staff.
1 Scope
226
This part of ISO 13165 specifies the determination of radium-226 ( Ra) activity concentration in all
types of water by emanometry.
226
The method specified is suitable for the determination of the soluble, suspended, and total Ra activity
226 −1
concentration in all types of water with soluble Ra activity concentrations greater than 0,02 Bq l .
228 220
In water containing high activity concentrations of Th, interference from Rn decay products can
lead to overestimation of measured levels (see Figure A.2).
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 5667-3, Water quality — Sampling — Part 3: Preservation and handling of water samples
ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories
ISO 80000-10, Quantities and units — Part 10: Atomic and nuclear physics
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions in ISO 80000-10 and the following apply.
3.1.1
reference measurement standard
measurement standard designated for the calibration of other measurement standards for quantities of
a given kind in a given organization or at a given location
3.1.2
working measurement standard
measurement standard that is used routinely to calibrate or verify measuring instruments or measuring
systems
Note 1 to entry: A working measurement standard can be used as a solution of known activity concentratio
...
SLOVENSKI STANDARD
oSIST prEN ISO 13165-2:2019
01-julij-2019
Kakovost vode - Radij Ra-226 - 2. del: Preskusna metoda z emanometrijo (ISO
13165-2:2014)
Water quality - Radium-226 - Part 2: Test method using emanometry (ISO 13165-
2:2014)
Wasserbeschaffenheit - Radium 226 - Teil 2: Untersuchungsverfahren mittels
Emanometrie (ISO 13165-2:2014)
Qualité de l'eau - Radium 226 - Partie 2: Méthode d'essai par émanométrie (ISO 13165-
2:2014)
Ta slovenski standard je istoveten z: prEN ISO 13165-2
ICS:
13.060.60 Preiskava fizikalnih lastnosti Examination of physical
vode properties of water
17.240 Merjenje sevanja Radiation measurements
oSIST prEN ISO 13165-2:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 13165-2:2019
---------------------- Page: 2 ----------------------
oSIST prEN ISO 13165-2:2019
INTERNATIONAL ISO
STANDARD 13165-2
First edition
2014-04-15
Water quality — Radium-226 —
Part 2:
Test method using emanometry
Qualité de l’eau — Radium 226 —
Partie 2: Méthode d’essai par émanométrie
Reference number
ISO 13165-2:2014(E)
©
ISO 2014
---------------------- Page: 3 ----------------------
oSIST prEN ISO 13165-2:2019
ISO 13165-2:2014(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2014
All rights reserved. Unless otherwise specified, 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
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 13165-2:2019
ISO 13165-2:2014(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 . 2
5 Reagents and equipment . 3
5.1 Reagents. 3
5.2 Equipment . 3
6 Sampling and storage . 4
6.1 Sampling . 4
6.2 Sample storage . 4
7 Procedures . 4
7.1 Sample preparation . 4
7.2 Measurement conditions . . 5
7.3 Counting procedure . 5
8 Quality assurance and quality control programme . 5
8.1 General . 5
8.2 Influence parameters . 5
8.3 Instrument verification and calibration . 6
8.4 Method verification . 6
8.5 Demonstration of analyst capability . 6
9 Expression of results . 6
226
9.1 Activity concentration of water-soluble Ra . 6
9.2 Standard uncertainty of activity concentration . 7
9.3 Limits of the confidence interval . 8
9.4 Example . 8
10 Test report . 8
Annex A (informative) Decay chains of uranium-238 and thorium-232.10
Annex B (informative) Bubbler .12
Annex C (informative) Glass scintillation cell .14
Bibliography .15
© ISO 2014 – All rights reserved iii
---------------------- Page: 5 ----------------------
oSIST prEN ISO 13165-2:2019
ISO 13165-2:2014(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 147, Water quality, Subcommittee SC 3,
Radioactivity measurements.
ISO 13165 consists of the following parts, under the general title Water quality — Radium-226:
— Part 1: Test method using liquid scintillation counting
— Part 2: Test method using emanometry
The following parts are under preparation:
— Part 3: Test method using coprecipitation and gamma spectrometry
iv © ISO 2014 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 13165-2:2019
ISO 13165-2:2014(E)
Introduction
Radioactivity from several naturally occurring and human-made sources is present throughout the
environment. Thus, water bodies (surface waters, ground waters, sea waters) can contain radionuclides
of natural and human-made origins:
Natural radionuclides, including potassium-40, and those of the thorium and uranium decay series, in
particular radium-226, radium-228, uranium-234, uranium-238, and lead-210, can be found in water for
natural reasons (e.g. desorption from the soil and wash-off by rain water) or releases from technological
processes involving naturally occurring radioactive materials (e.g. the mining and processing of mineral
sands or phosphate fertilizer production and use).
Human-made radionuclides such as transuranium elements (americium, plutonium, neptunium, curium),
tritium, carbon-14, strontium-90, and some gamma emitters radionuclides can also be found in natural
waters as they can be authorized to be routinely released into the environment in small quantities in the
effluent discharge from nuclear fuel cycle facilities and following their use in unsealed form in medicine
or industry. They are also found in the water due to the past fallout of the explosion in the atmosphere
of nuclear devices and those following the Chernobyl and Fukushima accidents.
Drinking water can thus contain radionuclides at activity concentration which could present a risk to
human health. In order to assess the quality of drinking water (including mineral waters and spring
waters) with respect to its radionuclide content and to provide guidance on reducing health risks by
taking measures to decrease radionuclide activity concentrations, water resources (groundwater, river,
lake, sea, etc.) and drinking water are monitored for their radioactivity content as recommended by the
World Health Organization (WHO).
The need of a standard on a test method of radium-226 activity concentrations in water samples is
justified for test laboratories carrying out these measurements, required sometimes by national
authorities, as they may have to obtain a specific accreditation for radionuclide measurement in drinking
water samples.
Radium-226 activity concentration can vary widely according to local geological and climatic
−1 −1
characteristics and ranges from 0,001 Bq l in surface waters up to 50 Bq l in natural groundwaters.
−1
The guidance level for radium-226 in drinking water as recommended by WHO is 1 Bq l (see
Reference [11]).
NOTE The guidance level is the activity concentration (rounded to the nearest order of magnitude) with an
-1 -1
intake of 2 l∙d of drinking water for 1 year that results in an effective dose of 0,1 mSv∙y for members of the
public, an effective dose that represents a very low level of risk that is not expected to give rise to any detectable
adverse health effect.
This International Standard is one of a series on determination of the activity concentration of
radionuclides in water samples.
© ISO 2014 – All rights reserved v
---------------------- Page: 7 ----------------------
oSIST prEN ISO 13165-2:2019
---------------------- Page: 8 ----------------------
oSIST prEN ISO 13165-2:2019
INTERNATIONAL STANDARD ISO 13165-2:2014(E)
Water quality — Radium-226 —
Part 2:
Test method using emanometry
WARNING — Persons using this document should be familiar with normal laboratory practice.
This document does not purport to address all of the safety problems, if any, associated with its
use. It is the responsibility of the user to establish appropriate safety and health practices and to
ensure compliance with any national regulatory conditions.
IMPORTANT — It is absolutely essential that tests conducted in accordance with this document
be carried out by suitably qualified staff.
1 Scope
226
This part of ISO 13165 specifies the determination of radium-226 ( Ra) activity concentration in all
types of water by emanometry.
226
The method specified is suitable for the determination of the soluble, suspended, and total Ra activity
226 −1
concentration in all types of water with soluble Ra activity concentrations greater than 0,02 Bq l .
228 220
In water containing high activity concentrations of Th, interference from Rn decay products can
lead to overestimation of measured levels (see Figure A.2).
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 5667-3, Water quality — Sampling — Part 3: Preservation and handling of water samples
ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories
ISO 80000-10, Quantities and units — Part 10: Atomic and nuclear physics
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions in ISO 80000-10 and the following apply.
3.1.1
reference measurement standard
measurement standard designated for the calibration of other measurement standards for quantities of
a given kind in a given organization or at a given location
3.1.2
working measurement standard
measurement standard that is used routinely to calibrate or verify measuring instruments or measuring
systems
Note 1 to entry: A working measurement standard can be used as a solution of known activity concentration
obtained by precise dilution or dissolution of a reference standard.
© ISO 2014 – All rights reserved 1
---------------------- Page: 9 ----------------------
oSIST prEN ISO 13165-2:2019
ISO 13165-2:2014(E)
3.2 Symbols
For the purposes of this document, the symbols in ISO 80000-10 and the following apply.
226
c Ra activity concentration in water, in becquerel per litre
A
∗
decision threshold, in becquerel per litre
c
A
#
detection limit, in becquerel per litre
c
A
cc, lower and upper limits of the confidence interval, in becquerel per litre
AA
222
f correction factor for ingrowth of Rn in the bubbler, dimensionless
a
222
f correction factor for the decay of Rn in the detection volume, dimensionless
d
n number of counting cycle
number of alpha-emitters present in the cell per becquerel of radon after a waiting time
n period between the filling time and the counting time of the cell (n is approximately 3 at a
α α
waiting time of 3 h for 1 Bq of radon)
N number of background counts
0
N number of gross counts
t counting time (common to N, N ), in seconds
c 0
t time of the different steps of the measurement procedure, i = 0,1 and 2
i
U expanded uncertainty calculated by U = ku(c ) with k = 2
A
u(c ) standard uncertainty associated with the measurement result
A
V volume of the test sample, in litre
ε
total efficiency including degassing efficiency and counting efficiency of the system for a
222
count carried out with a radioactive equilibrium between Rn and its short-lived decay
products, in pulses per second per becquerel
222
λ decay constant of the Rn, per second
4 Principle
222
This test method is based on the emanation and scintillation counting of Rn, a gaseous daughter
226
product of Ra, from a solution (see Reference [6]).
226
The measurement of Ra activity concentration in water is carried out following two separate steps,
the sample preparation followed by the measurement of the test sample.
Preparati
...
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