ISO INTERNATIONAL STANDARD 18447 First edition 2021-06 Tea Determination of theaflavins in black tea Method using high performance liquid chromatography Thé-Détermination des théaflavines dans le thé noirMéthode par chromatographie liquide a haute performance Reference number IS0 18447:2021(E) ISO @ISO2021 IS0 18447:2021(E) COPYRIGHTPROTECTED DOCUMENT @IS02021 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 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2021 - All rights reserved