ISO INTERNATIONAL STANDARD 10203 Fourth edition 2017-03 Iron ores Determination of calcium Flame atomic absorption spectrometric method Minerais de fer-Dosage du calcium-Methode par spectrometrie d'absorption atomique dans la flamme Reference number IS0 10203:2017(E) International Organization for Standardization @ IS0 2017 ZHEJIANG INST OF STANDARDIZATION C1 5956617 vided by IHS underI ted without license from IHS IS0 10203:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISOcopyrightoffice 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 Internatinair PrganizationforStandardization Licensee-ZHEJIANG INST OF STANDARDIzAoISQ7 -All rights reserved Not for Resale, 2017/5/16 00:38:12 etworking permitted without license from IHS IS0 10203:2017(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references 3 Terms and definitions ..1 4 Principle 5 Reagents. ..2 6 Apparatus ..3 7 Sampling and samples ..3 7.1 Laboratory sample ..3 7.2 Preparation of predried test samples. .4 7.2.1 General .4 7.2.2 Method specified in IS0 2596 7.2.3 Method specified in IS0 7764. .4 8 Procedure. .4 8.1 Number of determinations. ..4 8.2 Testportion 4 8.3 Blank test and check test. .5. 8.3.1 Blanktest. .5 8.3.2 Checktest .5 8.4 Determination .5 8.4.1 Decomposition of the test portion .5 8.4.2 Treatment of the residue .5 8.4.3 Preparation of the test solution .6 8.4.4 Adjustmentoftheatomicabsorptionspectrometer .6 8.4.5 Atomic absorption measurements ..7 9 Expression of results .7 9.1 Calculationofmassfractionofcalcium .17 9.2 General treatment of results . 1 9.2.1 Repeatability and permissible tolerance .7 9.2.2 Determination of analytical result .8 9.2.3 Between-laboratories precision .8 9.2.4 Check for trueness. ..8 9.2.5 Calculation of final result ..10 9.3 Oxidefactor ..10 10 Test report ..10 Annex A (normative) Flowsheet of the procedure for the acceptance of analytical values for test samples .11 Annex B (informative) Derivation of repeatability and permissible tolerance formulae. ..12 Annex C (informative) Precision data obtained by international analytical trials ..13 Bibliography .14 iii ee=ZHEJIANG INSTOFSTANDARDIZATION C15956617 ed without license from IHS