ISO INTERNATIONAL STANDARD 17992 First edition 2013-09-15 Iron ores Determination of arsenic content - Hydride generation atomic absorption spectrometric method Minerais de fer-Dosage de I'arsenic-Methode par spectrometrie d'absorption atomique a generation d'hydrure Reference number ISO 17992:2013(E) LSO IS02013 HS under ted without license from IHS Not for Resale IS0 17992:2013(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2013 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. ISO copyright office Case postale 56:CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax +4122 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ IS0 2013 - All rights reserved No reproductic networking permited without license from IHS Not for Resale IS0 17992:2013(E) Contents Page Foreword ..iv 1 Scope 2 Normative references .1 3 Principle. ..1 4 Reagents ..1 5 Apparatus. ..3 6 Sampling and samples .4 6.1 Laboratory sample .4 6.2 Preparation of predried test samples ..4 7 Procedure .4 7.1 Number of determinations .4 7.2 Test portion. ..4 7.3 Blank test and check test 4 7.4 Determination .5 8 Expression of results .7 8.1 Calculation of mass fraction of arsenic content. .7 8.2 Generaltreatmentofresults 8.3 Oxidefactor 10 9 Test report .10 Annex A (normative) Flow sheet of the procedure for the acceptance of analytical values for testsample .13 Annex B (informative) Parameters of some instruments ..14 Annex C (informative) Derivation of repeatability and permissible tolerance formulae ..16 Annex D (informative) Precision data obtained by international analytical trials .17 iii lout license from IHS Not for Resale