EN ISO 22515:2021

Water quality - Iron-55 - Test method using liquid scintillation counting (ISO 22515:2021)

This document specifies a test method for the determination of iron-55 (55Fe) activity concentration in samples of all types of water using liquid scintillation counting (LSC). Using currently available liquid scintillation counters, this test method can measure the 55Fe activity concentrations in the range from the limit of detection up to 120 mBq l-1. These values can be achieved with a counting time between 7 200 s and 10 800 s for a sample volume from 0,5 l to 1,5 l. Higher activity concentrations can be measured by either diluting the sample or using smaller sample aliquots or both.
NOTE      These performance indicators are wholly dependent on the measurement regimes in individual laboratories; in particular, the detection limits are influenced by amount of stable iron present.
The range of application depends on the amount of dissolved material in the water and on the performance characteristics of the measurement equipment (background count rate and counting efficiency).
It is the laboratory’s responsibility to ensure the suitability of this test method for the water samples tested.

Wasserbeschaffenheit - Eisen‑55 - Verfahren mit dem Flüssigszintillationszähler (ISO 22515:2021)

Dieses Dokument legt ein Prüfverfahren zur Bestimmung der Aktivitätskonzentration von Eisen 55 (55Fe) in Proben aller Arten von Wasser mittels Flüssigszintillationszählverfahren (LSC) fest. Bei Verwendung der derzeit verfügbaren Flüssigszintillationszähler können mit diesem Prüfverfahren die 55Fe Aktivitäts-konzentrationen im Bereich von der Nachweisgrenze bis 120 mBq·l−1 gemessen werden. Diese Werte lassen sich bei einer Messdauer zwischen 7 200 s und 10 800 s bei einem Probenvolumen von 0,5 l bis 1,5 l erreichen. Höhere Aktivitätskonzentrationen können entweder durch Verdünnen der Probe oder Verwenden kleinerer Probenaliquote oder durch beides gemessen werden.
ANMERKUNG   Diese Leistungsindikatoren sind vollständig von den Messverfahren in den einzelnen Labors abhängig; insbesondere werden die Nachweisgrenzen von der Menge des vorhandenen stabilen Eisens beeinflusst.
Der Einsatzbereich hängt von der Menge gelösten Materials im Wasser und von der Leistungsfähigkeit der Messgeräte (Zählrate des Nulleffekts und Zählausbeute) ab.
Es liegt in der Verantwortung des Labors, sicherzustellen, dass das Prüfverfahren für die zu messenden Wasserproben geeignet ist.
WARNUNG — Anwender dieses Dokuments sollten mit der üblichen Laborpraxis vertraut sein. Dieses Dokument gibt nicht vor, alle unter Umständen mit der Anwendung des Verfahrens verbundenen Sicherheitsaspekte anzusprechen. Es liegt in der Verantwortung des Arbeitgebers, angemessene Sicherheits- und Schutzmaßnahmen zu treffen und die Anwendbarkeit aller anderen Einschränkungen zu bestimmen.
WICHTIG — Es ist erforderlich, bei Untersuchungen nach diesem Dokument Fachleute oder Facheinrichtungen einzuschalten.

Qualité de l'eau - Fer-55 - Méthode d’essai par comptage des scintillations en milieu liquide (ISO 22515:2021)

Le présent document spécifie une méthode d’essai pour la détermination de l’activité volumique du fer 55 (55Fe) dans des échantillons de tous les types d’eau, en utilisant un comptage des scintillations en milieu liquide (CSL). Utilisant les compteurs à scintillations en milieu liquide actuellement disponibles, cette méthode d’essai peut mesurer les activités volumiques de 55Fe dans la plage allant de la limite de détection à 120 mBq l−1. Ces valeurs peuvent être atteintes avec une durée de comptage comprise entre 7 200 s et 10 800 s pour un volume d’échantillon de 0,5 l à 1,5 l. Des activités volumiques supérieures peuvent être mesurées soit en diluant l’échantillon, soit en utilisant des aliquotes plus petites, soit les deux.
NOTE         Ces indicateurs de performance dépendent entièrement des régimes de mesure des différents laboratoires. Les limites de détection sont notamment influencées par la quantité de fer stable présente.
Le domaine d’application dépend de la quantité de matière dissoute dans l’eau et des caractéristiques de performance de l’équipement de mesure (taux de comptage de bruit de fond et rendement de comptage).
Il incombe au laboratoire de s’assurer de la conformité de cette méthode d’essai aux échantillons d’eau soumis à essai.

Kakovost vode - Železo Fe-55 - Preskusna metoda s štetjem s tekočinskim scintilatorjem (ISO 22515:2021)

General Information

• Status: Published
• Publication Date: 08-Jun-2021
• Withdrawal Date: 30-Dec-2021
• 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: 09-Jun-2021
• Completion Date: 09-Jun-2021
• Ref Project: SIST EN ISO 22515:2021 - Water quality - Iron-55 - Test method using liquid scintillation counting (ISO 22515:2021)

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2021
Kakovost vode - Železo Fe-55 - Preskusna metoda s štetjem s tekočinskim
scintilatorjem (ISO 22515:2021)
Water quality - Iron-55 - Test method using liquid scintillation counting (ISO 22515:2021)
Wasserbeschaffenheit - Eisen‑55 - Verfahren mit dem Flüssigszintillationszähler (ISO
22515:2021)
Qualité de l'eau - Fer-55 - Méthode d’essai par comptage des scintillations en milieu
liquide (ISO 22515:2021)
Ta slovenski standard je istoveten z: EN ISO 22515:2021
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 22515
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2021
EUROPÄISCHE NORM
ICS 17.240
English Version
Water quality - Iron-55 - Test method using liquid
scintillation counting (ISO 22515:2021)
Qualité de l'eau - Fer-55 - Méthode d'essai par Wasserbeschaffenheit - Eisen-55 - Verfahren mit dem
comptage des scintillations en milieu liquide (ISO Flüssigszintillationszähler (ISO 22515:2021)
22515:2021)
This European Standard was approved by CEN on 20 April 2021.

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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 22515:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 22515:2021) 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 December 2021, and conflicting national standards
shall be withdrawn at the latest by December 2021.
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 22515:2021 has been approved by CEN as EN ISO 22515:2021 without any modification.

INTERNATIONAL ISO
STANDARD 22515
First edition
2021-05
Water quality — Iron-55 — Test
method using liquid scintillation
counting
Qualité de l'eau — Fer-55 — Méthode d’essai par comptage des
scintillations en milieu liquide
Reference number
ISO 22515:2021(E)
©
ISO 2021
ISO 22515:2021(E)
© ISO 2021
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 2021 – All rights reserved

ISO 22515:2021(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions, symbols, and units . 2
3.1 General use . 2
55 59
3.2 Fe and Fe specific terms . 3
4 Principle . 5
5 Reagents . 5
5.1 Standard solutions . 5
5.1.1 Iron-55 and Fe standards . 5
5.1.2 Stable iron standards . 5
5.1.3 Chemical Quenching agent . 6
5.1.4 Colour Quenching agent . 6
5.2 Holdback carrier . 6
5.3 Water . 6
5.4 Specific reagents for chemical separation . 6
5.4.1 Stable iron carrier solution . 6
-1 6
5.4.2 Ammonium hydroxide solution, c(NH OH) = 4 mol l .
-1 6
5.4.3 Nitric acid solution, c(HNO ) = 7,2 mol l .
-1 6
5.4.4 Ammonium hydroxide solution, c(NH OH) = 6 mol l .
-1 6
5.4.5 Hydrochloric acid, c(HCl) = 9 mol l .
-1 6
5.4.6 Hydrochloric acid, c(HCl) = 6 mol l .
-1 6
5.4.7 Hydrochloric acid, c(HCl) = 4 mol l .
-1 6
5.4.8 Hydrochloric acid, c(HCl) = 0,01 mol l .
-1 6
5.4.9 Nitric acid solution, c(HNO ) = 8 mol l .
-1 7
5.4.10 Nitric acid solution, c(HNO ) = 2 mol l .
-1 7
5.4.11 Sodium hydrogen phosphate, c(Na HPO ) = 0,5 mol l .
2 4
-1 7
5.4.12 Hydrochloric acid, c(HCl) = 1 mol l .
6 Equipment . 7
6.1 Laboratory equipment for direct evaporation . 7
6.2 Liquid scintillation vials . 7
6.3 Measurement equipment: Liquid scintillation counter . 7
7 Sampling and sample preparation . 7
8 Liquid scintillation set up and calibration . 7
8.1 Region setting . 7
8.2 Background . 8
8.3 Calibration . 8
9 Procedure. 9
9.1 Preliminary . 9
[11] 9
9.1.1 Stable iron content .
9.1.2 Iron separation . 9
9.2 Iron-55 source preparation.10
10 Quality control .11
11 Expression of results .11
11.1 Iron recovery .11
11.2 Detection efficiencies .12
11.2.1 Fe detection efficiency .12
11.2.2 Fe detection efficiency .
...