ISO INTERNATIONAL STANDARD 22517 IULTCS/IUC 38 First edition 2019-05 Leather Chemical tests Determination of pesticide residues content Cuir Essais chimiques - Determination de la teneur en résidus de pesticides Reference numbers IS022517:2019(E) iso IULTCS/IUC 38:2019(E) U S @ IS0 2019 IS0 22517:2019(E) IULTCS/IUC 38:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 CP 40i: Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @IS0 2019 -All rights reserved IS0 22517:2019(E) IULTCS/IUC 38:2019(E) Contents Page Foreword .iv 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Principle 5 Safety precautions 1 6 Reagents. .2 7 Apparatus. .2 8 Procedure 3 8.1 Sample. 3 8.2 Extraction 3 8.3 Purification 3 8.4 Calibrationsolutions 4 8.4.1 Preparation of calibration solution mixture 4 8.4.2 Preparation of calibration mixture for recovery rate. 4 8.5 Preparation of blank sample 8.6 AnalysisbyGC-MS 4 8.7 Check of the analytical system 4 9 Evaluation of results 5 9.1 Calculation of results 5 9.2 Reliability of the method 5 10 Testreport 5 Annex A (normative) 24 kinds of pesticide compounds .6 Annex B (informative) GC-MS chromatographic conditions and parameters .7 Annex C (informative) Retention time, quantitative and qualitative ions and ion abundance ratios. .8 Annex D (informative) Start time and dwell time of each group of detecting ions. .9 Annex E (informative) Chromatogram and selected ion of the 24 pesticides standard obtained by GC-MS 10 Annex F (informative) Recovery range of pesticides in leather (n = 6) .11 Annex G (informative) Precision .13 Bibliography 15 @ IS0 2019 - All rights reserved ii