EN ISO 11704:2015

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Wasserbeschaffenheit - Bestimmung der Gesamt-Alpha- und Gesamt-Beta-Aktivität in nicht-salzhaltigem Wasser - Verfahren mit dem Flüssigszintillationszähler (ISO 11704:2010)Qualité de l'eau - Mesurage des activités alpha globale et bêta globale des eaux non salines - Méthode de comptage par scintillation liquide (ISO 11704:2010)Water quality - Measurement of gross alpha and beta activity concentration in non-saline water - Liquid scintillation counting method (ISO 11704:2010)17.240Merjenje sevanjaRadiation measurements13.060.60Preiskava fizikalnih lastnosti vodeExamination of physical properties of waterICS:Ta slovenski standard je istoveten z:EN ISO 11704:2015SIST EN ISO 11704:2015en,de01-oktober-2015SIST EN ISO 11704:2015SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN ISO 11704
August 2015 ICS 17.240; 13.060.60 English Version
Water quality - Measurement of gross alpha and beta activity concentration in non-saline water - Liquid scintillation counting method (ISO 11704:2010)
Qualité de l'eau - Mesurage des activités alpha globale et bêta globale des eaux non salines - Méthode de comptage par scintillation liquide (ISO 11704:2010)
Wasserbeschaffenheit - Bestimmung der Gesamt-Alpha- und Gesamt-Beta-Aktivität in nicht-salzhaltigem Wasser - Verfahren mit dem Flüssigszintillationszähler (ISO 11704:2010) This European Standard was approved by CEN on 30 July 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.
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Page European foreword .3 SIST EN ISO 11704:2015

Reference numberISO 11704:2010(E)© ISO 2010
INTERNATIONAL STANDARD ISO11704First edition2010-07-01Water quality — Measurement of gross alpha and beta activity concentration in non-saline water — Liquid scintillation counting method Qualité de l'eau — Mesurage des activités alpha globale et bêta globale des eaux non salines — Méthode de comptage par scintillation liquide
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ii © ISO 2010 – All rights reserved
ISO 11704:2010(E) © ISO 2010 – All rights reserved iii Contents Page Foreword.iv 1 Scope.1 2 Normative references.1 3 Symbols, definitions and units.2 4 Principle.2 5 Reagents and equipment.3 6 Sampling.4 7 Procedure.4 7.1 Direct counting.4 7.2 Thermal preconcentration.5 7.3 Sample preparation.5 7.4 Liquid scintillation measurement.5 8 Expression of results.7 8.1 Calculation of activity per unit of mass.7 8.2 Standard uncertainty.8 8.3 Decision threshold.8 8.4 Detection limit.9 8.5 Confidence limits.9 8.6 Quality control.10 9 Interference control.10 9.1 Contamination.10 9.2 Ingrowth of radon.10 9.3 Loss of polonium.10 10 Test report.10 Bibliography.12
ISO 11704:2010(E) iv © ISO 2010 – All rights reserved 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 11704 was prepared by Technical Committee ISO/TC 147, Water quality. SIST EN ISO 11704:2015

INTERNATIONAL STANDARD ISO 11704:2010(E) © ISO 2010 – All rights reserved 1 Water quality — Measurement of gross alpha and beta activity concentration in non-saline water — Liquid scintillation counting method WARNING — Persons using this International Standard should be familiar with normal laboratory practice. This standard 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 according to this International Standard be carried out by suitably trained staff. 1 Scope This International Standard specifies a method for the determination of gross alpha and gross beta activity in waters for radionuclides which are not volatile at 80 °C. Radon isotopes and their decay products of short half life are not included in the determination. The method is applicable to raw and potable waters with a dry residue less than 5 g/l and when no correction for colour quenching is necessary. 2 Normative references The following referenced documents are indispensable for the application of this document. 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: Guidance on the 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 SIST EN ISO 11704:2015

ISO 11704:2010(E) 2 © ISO 2010 – All rights reserved 3 Symbols, definitions and units For the purposes of this document, the definitions, symbols and abbreviations defined in ISO 80000-10, as well as the following symbols, definitions and units, apply. aα, aβ Alpha and beta activity per mass Bq g−1 a* Decision threshold Bq g−1 #a Detection limit Bq g−1 ,aa Lower and upper limits of the confidence interval Bq g−1 Aα, Aβ Activity of the alpha and beta emitter certified reference solution used for the α and β calibration sources Bq m Mass of the test sample g m1 Mass of initial sample subject to heating or possibly concentration g m2 Mass of heated or concentrated sample g m3 Mass of heated or concentrated sample transferred in the vial g mSα, mSβ Mass of alpha and beta emitters certified reference solutions, respectively g rgα, rgβ Sample gross count rate, from the alpha and beta windows, respectively
s−1 r0α, r0β, r0T Blank count rate, from the alpha, beta and total windows, respectively s−1 rSα,α, rSα,β, rSα,T Count rate of the alpha calibration source in the alpha, beta and total window s−1 rSβ,α, rSβ,β, rSβ,T Count rate of the beta calibration source in the alpha, beta and total window s−1 tg Sample counting time s t0 Blank counting time s tsα, tsβ Counting time of α and β calibration sources s u (a) Standard uncertainty associated with the measurement result Bq g−1 U Expanded uncertainty, calculated fro
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