ISO INTERNATIONAL STANDARD 23201 First edition 2015-11-15 Aluminium oxide primarily used for production of aluminium - Determination of trace elements - Wavelength dispersive X-ray fluorescence spectrometric method Oxyde d'aluminium utilisé pour la production d'aluminium Détermination d'éléments traces- -Spectrometriedefluorescencedes rayons X par dispersion en longueur d'onde Reference number IS0 23201:2015(E) SO International Organization for Standardization @ IS0 2015 HEJIANG INST OF STANDARDIZATION C15956617 ed without license from IHS IS0 23201:2015(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 copyrightoffice 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 PrganizationforStandardization ensee-ZHEJIANG INST.OF STANDARDIzARoISQ15- All rights reserved Not for Resale, 2016/3/29 05:58:33 etworking permitted without license from IHS IS0 23201:2015(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. .1 2 Normative references ..1 3 Principle .2 4 Reagents and materials. .2 5 Apparatus. .3 6 Sampling and samples .5 7 Procedure .5 7.1 General ..5 7.2 Preparation of calibration specimens .6 7.2.1 Determination of loss of mass on fusion of flux and flux correction .6 7.2.2 Preparation of intermediate calibration glass (ICG) .6 7.2.3 Preparation of the synthetic calibration disk (SCD) .7 7.2.4 Preparation of the blank calibration discs. .9 7.3 Preparation of the sample discs. .9 7.4 X-ray fluorescence measurement. 10 7.4.1 Generalinstrumentalconditions 10 7.4.2 Guidelines for instrument optimization .11 7.4.3 Sample loading ..11 7.4.4 Monitor disc: correction for instrumental drift ..11 7.4.5 Measurements for calibration.. .12 7.4.6 Measurement of test discs. .13 8 Calculations. .13 8.1 Calculation of net intensity. .13 8.2 Comparison of duplicate measurements for the Al2O3 blanks and Synthetic Calibration Discs (SCDs), ..14 8.2.1 ScDs criteria for the acceptability of duplicate measurements ..14 8.2.2 Al2O3 blanks criteria for the acceptability of duplicate measurement ..14 8.3 Driftcorrectionofmeasuredintensities ..15 8.4 Calculation of the calibration parameters. ..15 9 Consistency checks and reporting results ..16 10 Precision ..16 11 Accuracy ..17 12 Quality assurance and control ..17 13 Test report ..17 Annex A (informative) Contamination issues and care of platinum ware ..19 Annex B (normative) Example of instrument optimization ..21 Annex C (informative) Calculation of reagent masses for different sample/flux combinations and synthetic calibration discs when omitting some elements ..25 Annex D (informative) Preparation of monitor disc ..27 Annex E (informative) Interlaboratory test program analysis of NIST 699 and ASCRM 27 smelter grade alumina, certified reference materials .29 Annex F (informative) Comments on flux purity ..31 Bibliography ..32 iii thout license from IHS