ISO INTERNATIONAL STANDARD 23942 First edition 2022-11 Determination of hydroxytyrosol and tyrosol content in extra virgin olive oils - Reverse phase high performance liquid chromatography (RP-HPLC) method Détermination de la teneuren hydroxytyrosolet tyrosol dans les huiles d'olive vierges extra-Methode par chromatographie liquidea hauteperformance enphase inverse (CLHP-RP) Referencenumber IS023942:2022(E) ISO IS02022 IS023942:2022(E) COPYRIGHTPROTECTEDDOCUMENT IS02022 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 CP401:Ch.de Blandonnet8 CH-1214 Vernier, Geneva Phone:+4122 749 0111 Email: [email protected] Website:www.iso.org Published inSwitzerland ii @IS02022-All rights reserved