BS ISO 15634:2015 BSI Standards Publication Iron ores Determination of chromium content - Flame atomic absorption spectrometric method bsi. ..making exCellenCe a habit: BS ISO 15634:2015 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO 15634:2015. It supersedes BS ISO 15634:2005 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ISE/58, Iron ores. A list of organizations represented onthis 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 ISBN9780580883415 ICS 73.060.10 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the StandardsPolicy and StrategyCommitteeon31August2015 Amendments issued sincepublication Date Text affected BS ISO 15634:2015 ISO 15634 INTERNATIONAL STANDARD Second edition 2015-08-01 Iron ores Determination of chromium content Flame atomic absorption spectrometric method Minerais de fer-Dosageduchrome-Méthode par spectrometrie d'absorptionatomiquedanslaflamme TSO ISORegnc2ougbey @IS02015 BSISO15634:2015 IS015634:2015(E) COPYRIGHTPROTECTEDDOCUMENT ISO2015, Published in Switzerland AHbyghty rasansedlalestronicotherwipenifiedlaniclaindfiuthisgpplbbicatbpyimgyoltqnsthgintprndtioedntnttiaet) otineamyisovithout 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. fsodecparibh Aeics 3·CP401 CH-1214 Vernier, Geneva, Switzerland Tel.+41 22 749 0111 Fax +41 22 749 09 [email protected] 47 www.iso.org ii @ IS0 2015 - All rights reserved BS ISO15634:2015 IS0 15634:2015(E) Contents Page Foreword iv Scope 1 2 Normative references .1 3 Principle 1 4 Reagents 1 5 Apparatus. 2 6 Sampling and samples 3 6.1 Laboratory sample 3 6.2 Preparationof predriedtestsamples 7 Procedure. 4 7.1 Numberofdeterminations 4 7.2 Test portion. 4 7.3 Bhtekrtistaioh check.test. 7.4.1 Decomposition of the test portion 4 7.4.2 5 Removalofiron.. 7.4.3 5 7.4.5 Preparationoftheflamesettingsolution. 6 7.4.6 Adjustmentoftheatomicabsorptionspectrometer 6 8 Expression of results 6 8.1 Calculation of chromium content. 6 8.2 General treatment of results 7 8.2.1 Roptatabihityiofanalytecahissiblltolerance 8.2.3 .7 Between-laboratories precision 8.2.4 Checkfor trueness .8 9 Test report. 9 Annex A (normative) Flowsheet of the procedure for the acceptance of analytical values for 10 testsamples Annex B (informative)Derivation ofrepeatability and permissibletoleranceequations .11 .12 Annex C (informative) Precision data obtained by international analytical trial Bibliography .13 @ IS0 2015-All rights reserved iii BS ISO 15634:2015 IS0 15634:2015(E) Foreword Iso (the International Organizationfor Standardization)is a worldwide federation of national standards thundiegh(IsO tecamicet codbiesfthsewofkaf ptapbeingbodyInitteresitedailhStandebjdsti soowhidhycarrtiechaital committeehasbeen established hastherighttoberepresentedonthat committee.International organizations, governmental and non-governmental, in liaison with IsO,alsotake part in the work. ISO collaborates closely with the electrotechnical standardization.International Electrotechnical Commission (IEC)on allmatters of The procedures used to develop this document and those intended for its further maintenance are editorialrules of the IsO/IEC Directives, Part2 (see www.iso.org/directives). Rttentionrights.dfswtstan nbepbsltbthay responsithefalemaentryfng alyshsh'docmaxhp te R ffgits, subject of anypate on the Iso list of patent declarationsreceived (seewww.iso.org/patents). Anytrade used in this constitute nameendorsement. document is information given for the convenience of users and does not For an explanation on the mean