ISO INTERNATIONAL STANDARD 13933 First edition 2014-07-15 Steel and iron Determination of calcium and magnesium Inductively coupled plasma atomic emission spectrometric method Aciers et fontes - Détermination du calcium et du magnésium - Méthode par spectrometrie d'émission atomique avec plasma induit Reference number ISO 13933:2014(E) ISO @IS02014 mitted without license from IHS Not for Resale IS0 13933:2014(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2014 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 Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax +41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ IS0 2014 - All rights reserved No reproduction or networking permited without license from IHS Not for Resale IS0 13933:2014(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references ..1 3 Principle. 4 Reagents 5 .3 Apparatus 5.1 Inductively coupled plasma atomic emission spectrometer .3 5.2 Polytetrafluoroethylene (PTFE) beakers with PTFE cover. .4 6 Sampling. .5 7 Procedure .5 7.1 Test portion. 5 7.2 Blank test.. .5 7.3 Determination .5 7.4 Adjustment of the apparatus 7 7.5 Measurement of the calibration solutions 7 7.6 Plotting a calibration curve ..8 7.7 Measurements of the test solution ..8 8 Expression of results .8 8.1 Method of calculation ..8 Precision. 8.2 9 Test report .9 Annex A (normative) Procedure for the determination of instrumental criteria ..10 Annex B (informative) Additional information on international cooperative test ..12 Annex C (informative) Graphical representation of precision data ..14 Bibliography .16 ii se with ISt vithout license from IHS Not for Resale