ISO INTERNATIONAL STANDARD 11543 First edition 2000-09-15 Modified starch Determination of hydroxypropyl content Method using proton nuclear magnetic resonance (NMR) spectrometry Amidon modifieé Détermination de la teneur en hydroxypropyle - Méthode spectrometrique de résonance magnetique nucleaire du proton Reference number A ISO 11543:2000(E) ISO @ISO 2000 HS under ted without license from IHS Not for Resale ISO11543:2000(E) PDFdisclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this area. Adobe is a trademarkof Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event @ISO2000 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56.CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.ch Printed in Switzerland @ Iso 2000 - All rights reserved py IHS unde ermittedwithoutlicense from IHS Not for Resale ISO 11543:2000(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through iSsO technical the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with IsO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights International Standard ISO 11543 was prepared by Technical Committee ISO/TC 93, Starch (including derivatives and by-products). Annex A of this International Standard is for information only ii INTERNATIONAL STANDARD ISO11543:2000(E) Modified starch Determination of hydroxypropyl content . Method using proton nuclear magnetic resonance (NMR) spectrometry Scope This International Standard specifies a proton NMR spectrometric method for the determination of the hydroxypropyl content of granular modified starch. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to undated references, the latest edition of the normative document referred to applies. Members of IsO and IEC maintain registers of currently valid International Standards. IsO 3696:1987, Water for analytical laboratory use - Specifications and test methods. 3 Principle The modified starch is dissolved by partial hydrolysis in a solution of deuterium chloride in deuterium oxide The signal coming from the three protons of the methyl group in the hydroxypropyl function is measure