ISO INTERNATIONAL STANDARD 21468 First edition 2020-10 Infant formula and adult nutritionals Determination of free and total choline and free and total carnitine - Liquid chromatography tandem mass spectrometry (HPLC- MS/MS) Formules infantiles et produits nutritionnels pour adultes - Détermination de la teneur en choline totale et la teneur en carnitine par chromatographie en phase liquide et spectrométrie de masse en tandem (CL-SM/SM) Reference number IS0 21468:2020(E) ISO @ IS0 2020 IS0 21468:2020(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2020 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 anyform or by anymeans, electronic or mechanical, including photocopying,or posting below or Iso's member body in the country of the requester iso copyright ofice 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 Switz.erland i @ IS0 2020 - All rights reserved