ISO INTERNATIONAL STANDARD 13032 First edition 2012-03-01 Petroleum products Determination of low concentration of sulfur in automotive fuels Energy-dispersive X-ray fluorescence spectrometric method Produits pétroliers -Determination de la teneur en soufre en faible concentration dans les carburants pour automobiles Méthode spectrométrique de fluorescence de rayons X dispersive en énergie Reference number ISO 13032:2012(E) LSO @ ISO 2012 IHS under ted without license from IHS Not for Resale ISO13032:2012(E) COPYRIGHTPROTECTEDDOCUMENT ISO2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing 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 @ ISO 2012 -All rights reserved No reproductic etworking permitted without license from IHS Not for Resale ISO 13032:2012(E) Contents Page Foreword .iv Introduction 1 Scope 2 Normative references 3 Principle.. 4 Reagents and materials. 4.1 Diluent oil... 4.2 Sulfur compounds.. 4.3 Reference materials (CRMs) 4.4 Quality control samples 5 Apparatus 5.1 Energy-dispersive X-ray fluorescence instrument. 6 Sampling and sample handling 3 7 Apparatus preparation. 7.1 Analyser.. 7.2 Sample cups 8 Calibration 8.1 General 8.2 Preparationofprimarystandards 8.3 Calibration standards. 8.4 Calibration procedure 6 9 Procedure 10 Calculation 11 Expression of results 12 Precision 8 12.1 General 8 12.2 Repeatability, r 8 12.3 Reproducibility, R 8 13 Test report. 8 Annex A (informative) Matrix effects . Annex B (normative) Guidelines for measuring low sulfur concentrations Bibliography ili Not for Resale