BS ISO 15247:2015 BSl Standards Publication Zinc sulfide concentrates - Determination of silver content Acid dissolution and flame atomic absorption spectrometric method bsi. ..making excellence a habit: BS ISO 15247:2015 BRITISH STANDARD National foreword This British Standard is the UK implementation of IS0 15247:2015. The UK participation in its preparation was entrusted to Technical Committee NFE/36, Copper lead and zinc ores and concentrates. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. @ The British Standards Institution 2015. Published by BSI Standards Limited 2015 ISBN978 0580818134 ICS 73.060.99 Compliance witha British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2015. Amendments issued since publication Date Text affected BS ISO 15247:2015 ISO INTERNATIONAL STANDARD 15247 Second edition 2015-07-01 Zinc sulfide concentrates Determination of silver content - Acid dissolution and flame atomic absorption spectrometric method Concentressulfures de zincDosagede I'argent-Methode par dissolutionacide etspectrometrie d'absorption atomique dans laflamme Referencenumber IS0 15247:2015(E) O @IS02015 BSISO15247:2015 IS0 15247:2015(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2015, Published in Switzerland 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 Ch.de Blandonnet 8.CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org ii ISO 2015-Allrights reserved BSISO 15247:2015 IS015247:2015(E) Contents Page Foreword iv 1 Scope .1 2 Normative references .1 3 Principle .1 4 Reagents. .1 5 Apparatus. .2 6 Samples. .3 6.1 Test sample. 3 6.2 Test portion 3 7 Procedure. .3 7.1 Number of determinations. 3 7.2 Blank test 3 7.3 Decompositionoftestportion 3 7.4 Determination of silver. 4 8 Expression of results 4 9 Precision 5 9.1 Expression ofprecision. 5 9.2 Method for obtaining the final result (see Annex B) 5 9.3 Precisionbetweenlaboratories 5 9.4 Check oftrueness. 6 10 Test reports. 7 Annex A (normative) Procedureforthepreparation and determination ofthemass ofa predried test portion. 8 AnnexB (normative)Flowsheet oftheprocedurefortheacceptance ofanalyticalvaluesfor testsamples .10 AnnexC(informative)Derivationofprecisionequations. .11 Bibliography .15 @ IS0 2015 - All rights reserved iii BSISO15247:2015 IS015247:2015(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/directive