International ISO Standard ISO5642 First edition Tea polyphenol extracts - 2024-05 Definition and basic requirements Extraits des polyphénols du thé - Définition et exigences fondamentales Reference number IS0 5642:2024(en) @ ISO 2024 IS0 5642:2024(en) COPYRIGHT PROTECTED DOCUMENT @ IS0 2024 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 Email: [email protected] Website: www.iso.org Published in Switzerland @ IS0 2024 - All rights reserved ii IS0 5642:2024(en) Contents Page Foreword. .. iv Introduction ..V 1 Scope. .1 2 Normative references .1 3 Terms and definitions. .1 4 Classification .1 5 Basic requirements .2 ..2 6 Sampling. 1 Test methods. ..2 @ IS0 2024 - All rights reserved iii