ISO/TR TECHNICAL REPORT 18336 First edition 2016-02-15 Guidelines for good XRF laboratory practice for the iron ore industry Lignes directrices de bonnes pratiques de laboratoire de spectrometrie de fluorescence de rayons X pour I'industrie du minerais de fer Reference number IS0/TR 18336:2016(E) ISO International Organization for Standardization See=ZHEJIANG INST OF STANDARDIZATION C1 5956617 @IS02016 vided by IHS under Not for Resale, 2016/4/26 01:59:14 No reproduction or networking permitted without license from IHS IS0/TR 18336:2016(E) COPYRIGHT PROTECTED DOCUMENT IS0 2016, 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. ISO copyright office 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 DrganizationforStandardization Licensee-ZHEJIANG INST OF STANDARDIZoISQ6 -All rights reserved HS und Not for Resale, 2016/4/26 01:59:1 No reproduction or networking permited without license from IHS IS0/TR 18336:2016(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope.... ..1 2 Reagents. 3 Apparatus ..2 4 Fused glass beads. .5 4.1 General .5 4.2 Storage .5 4.3 Disc making precision ..5 4.4 Bead distortion (curvature and flatness) .6 5 Quality control. .6 5.1 Selection of QC samples and frequency of preparation 6 5.2 Analysis of QC and analytical samples. 7 5.3 Controlcharts 7 5.4 Participation in proficiency test programs ..8 Annex A (informative) Results for flux loss on ignition testing ..9 Annex B (informative) Procedure to check disc making precision .10 Annex C (informative) Method to determine relationship between height and concentration ...11. Annex D (informative) Production of a height adjustable cup ..12 Annex E (informative) Bead measurement apparatus ..13 Annex F (informative) Flow sheet for fused bead quality ..14 Annex G (informative) Microsoft Excel program for calculating disc precision ..15 Annex H (informative) Data input screen for calculating disc precision ..19 Annex I (informative) Loss of accuracy with no loss of precision ..20 Annex J (informative) Loss of accuracy with loss of precision. ..22 Annex K (informative) Loss of accuracy and precision - Loss of bead making precision ..23 Annex L (informative) Results for spectrometer precision test ..25 Annex M (informative) Drift correction ..26 Bibliography .27 ii HEJIANG INST OF STANDARDIZATION C1 5956617 thout license from IHS