EN ISO 15587-1:2002

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Wasserbeschaffenheit - Aufschluss für die Bestimmung ausgewählter Elemente in Wasser - Teil 1:Königswasser-Aufschluss (ISO 15587-1:2002)Qualité de l'eau - Digestion pour la détermination de certains éléments dans l'eau - Partie 1: Digestion a l'eau régale (ISO 15587-1:2002)Water quality - Digestion for the determination of selected elements in water - Part 1: Aqua regia digestion (ISO 15587-1:2002)13.060.50VQRYLExamination of water for chemical substancesICS:Ta slovenski standard je istoveten z:EN ISO 15587-1:2002SIST EN ISO 15587-1:2003en01-maj-2003SIST EN ISO 15587-1:2003SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN ISO 15587-1March 2002ICS 13.060.50English versionWater quality - Digestion for the determination of selectedelements in water - Part 1: Aqua regia digestion (ISO 15587-1:2002)Qualité de l'eau - Digestion pour la détermination decertains éléments dans l'eau - Partie 1: Digestion à l'eaurégale (ISO 15587-1:2002)Wasserbeschaffenheit - Aufschluss für die Bestimmungausgewählter Elemente in Wasser - Teil 1:Königswasser-Aufschluss (ISO 15587-1:2002)This European Standard was approved by CEN on 1 March 2002.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 15587-1:2002 ESIST EN ISO 15587-1:2003

2002-04-17ForewordThis document (ISO 15587-1:2002) has been prepared by Technical Committee ISO/TC 147"Water quality" in collaboration with Technical Committee CEN/TC 230 "Water analysis", thesecretariat of which is held by DIN.This European Standard shall be given the status of a national standard, either by publicationof an identical text or by endorsement, at the latest by September 2002, and conflictingnational standards shall be withdrawn at the latest by September 2002.According to the CEN/CENELEC Internal Regulations, the national standards organizations ofthe following countries are bound to implement this European Standard: Austria, Belgium,Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and theUnited Kingdom.Endorsement noticeThe text of the International Standard ISO 15587-1:2002 has been approved by CEN as aEuropean Standard without any modifications.NOTE
Normative references to International Standards are listed in annex ZA (normative).SIST EN ISO 15587-1:2003

Where an International Publication has been modified by common modifications,indicated by (mod.), the relevant EN/HD applies.PublicationYearTitleEN/HDYearISO 36961987Water for analytical laboratory use —Specifications and test methodsEN ISO 36961995ISO 5667-31994Water quality – Sampling – Part 3: Guidanceon the preservation and handling of samplesEN ISO 5667-31995SIST EN ISO 15587-1:2003

Reference numberISO 15587-1:2002(E)© ISO 2002
INTERNATIONAL STANDARD ISO15587-1First edition2002-03-01Water quality — Digestion for the determination of selected elements in water — Part 1: Aqua regia digestion Qualité de l'eau — Digestion pour la détermination de certains éléments dans l'eau — Partie 1: Digestion à l'eau régale
ISO 15587-1:2002(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
©
ISO 2002 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.ch Web
www.iso.ch Printed in Switzerland
ii © ISO 2002 – All rights reserved
ISO 15587-1:2002(E) © ISO 2002 – All rights reserved iii Contents Page Foreword.iv 1 Scope.1 2 Normative references.1 3 Terms and definitions.2 4 Principle.2 5 Reagents.3 6 Apparatus.3 7 Sampling.4 8 Procedure.4 9 Test report.6 Annex A (informative)
Digestion in an open system using electrical heating.7 Annex B (informative)
Digestion in an open system using microwave-assisted heating.9 Annex C (informative)
Digestion in a closed system using microwave-assisted heating.11 Annex D (informative)
Digestion in a closed system using an autoclave.15 Annex E (informative)
Performance checks.17 Bibliography.18
ISO 15587-1:2002(E) iv © ISO 2002 – 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 3. 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 part of ISO 15587 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 15587-1 was prepared by Technical Committee ISO/TC 147, Water quality, Subcommittee SC 2, Physical, chemical and biochemical method. ISO 15587 consists of the following parts, under the general title Water quality — Digestion for the determination of selected elements in water:  Part 1: Aqua regia digestion  Part 2: Nitric acid digestion Annexes A to E of this part of ISO 15587 are for information only.
INTERNATIONAL STANDARD ISO 15587-1:2002(E) © ISO 2002 – All rights reserved 1 Water quality — Digestion for the determination of selected elements in water — Part 1: Aqua regia digestion WARNING — Persons using this part of ISO 15587 should be familiar with normal laboratory practice. This part of ISO 15587 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. 1 Scope This part of ISO 15587 specifies a method for extracting trace elements from a water sample using aqua regia as a digestion agent. The method is applicable to all types of waters with a suspended solids mass concentration of less than 20 g/l and a mass concentration of total organic carbon (TOC) expressed as carbon of less than 5 g/l. The aqua regia digestion method is empirical and it might not release elements completely. However, for most environmental applications, the result is fit for purpose. Aqua regia digestion is suitable for the release of: Ag, Al, As, B, Ba, Be, Ca, Cd, Co, Cr, Cu, Fe, Hg, K, Mg, Mn, Mo, Na, Ni, P, Pb, Sb, Se, Sn, Sr, Tl, V, Zn. It is not suitable for the digestion of refractory compounds such as SiO2, TiO2 and Al2O3. The presence of chloride in the digestion solution may limit the application of analytical techniques. The method is generic and may be implemented using a wide variety of equipment provided  the digestion composition is unchanged,  the digestion temperature is known, and  the digestion duration is in accordance with this temperature. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of ISO 15587. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO 15587 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 3696:1987, Water for analytical laboratory use — Specification and test methods ISO 5667-3:1994, Water quality — Sampling — Part 3: Guidance on the preservation and handling of samples SIST EN ISO 15587-1:2003

ISO 15587-1:2002(E) 2 © ISO 2002 – All rights reserved
3 Terms and definitions For the purposes of this part of ISO 15587, the following terms and definitions apply. 3.1 aqua regia solution obtained by mixing one volume of nitric acid with three volumes of hydrochloric acid 3.2 wet digestion treatment with reactive liquid chemicals with the aim of bringing analytes into solution so as to be suitable for subsequent analysis NOTE The degree to which analytes are brought into solution suitable for subsequent analysis may depend on the principle of the subsequent analysis. Some analytical methods require the element in solution to be independent of its chemical state, others require a specific valence or a specific ionic species, for instance hydride atomic spectrometry, photometry and electrochemical methods. For the latter, special attention should be paid to the presence of chemically stable organometals [5]. 4 Principle The test portion is digested with aqua regia at a defined temperature. The temperature is at least the boiling point (103 °C at 101,3 kPa) and at most 175 °C. At the boiling point (101,3 kPa), the minimum duration to release the digestible fraction is 120 min. The maximum duration is set at four times the minimum duration at that temperature. By convention, both the required minimum and maximum duration is assumed to halve with every 15 °C increase in temperature above the boiling point (see Figure 1). After digestion the digest is clarified, if necessary.
Figure 1 — Range of permitted digestion temperature and duration SIST EN ISO 15587-1:2003

ISO 15587-1:2002(E) © ISO 2002 – All rights reserved 3
...