ISO INTERNATIONAL STANDARD 22256 First edition 2020-07 Traditional Chinese medicine - Detection of irradiated natural products by photostimulated luminescence Medecine traditionnelle chinoise-Detection des produits naturels irradiesparluminescencephotostimulee Reference number IS022256:2020(E) ISO @IS0 2020 IS0 22256:2020(E) COPYRIGHTPROTECTEDDOCUMENT IS02020 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 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: +4122749 0111 Email: [email protected] Website: www.iso.org Published in Switzerland i @ IS0 2020 - All rights reserved IS022256:2020(E) Contents Page Foreword iv Introduction. .V 1 Scope. 1 2 Normative reference 1 3 Terms and definitions 1 4 Principle .2 5 Apparatus. .2 6 Procedure. 2 6.1 General 22 6.2 Sampling technique 6.2.1 General operation. 22 6.2.2 Sample quantity. 6.3 Instrumental calibration 3 Instrumental parameter 3 6.3.1 6.3.2 Dark count 3 6.3.3 Empty chamber test 3 6.3.4 Negativereference count 3 6.3.5 Positive reference count 3 6.4 Detection of the sample 3 6.4.1 Screening PSL 3 6.4.2 Calibrated PSL 3 6.4.3 F-factor calculating 3 6.5 Result evaluation. 3 7 Other requirements .4 7.1 Limitation of application .4 7.2 Repeated determination. .4 7.3 Cleaning of sample chamber 4 7.4 Cleaningoftranslucentglass 7.5 Influencing factors of threshold and F-factor 4 Bibliography 5 @ IS0 2020 - All rights reserved iii