ISO INTERNATIONAL STANDARD 10565 Second edition 1998-08-15 Oilseeds Simultaneous determination of oil and water contents Method using pulsed nuclear magnetic resonance spectrometry pulsée Tso Reference number ISO 10565:1998(E) THS unde Not for Resale ISO 10565:1998(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 isO technical committees. Each member body interested in a subject for which a technical committee has been established has 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 a vote. International Standard ISO 10565 was prepared by Technical Committee ISO/TC 34, Agricultural food products, Subcommittee SC 2, Oleaginous seedsandfruits Thissecond edition cancels s and replaces thefirst edition (iSO 10565:1993), which has been technically revised. @ISO1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced microfilm, without permission in writing from the publisher. InternationalOrganizationforStandardization Case postale 56 . CH-1211 Geneve 20 · Switzerland Internet [email protected] Printed in Switzerland inational Organization for Standardization from IHS Not for Resale INTERNATIONAL STANDARD @ ISO ISO 10565:1998(E) Oilseeds Simultaneous determination of oil and water contents Method using pulsed nuclear magnetic resonance spectrometry 1 Scope This International Standard specifies a rapid method for the determination of the oil and water contents of commercial oilseeds using pulsed nuclear magnetic resonance (NMR). It is applicable to rapeseeds, soya beans, linseeds and sunflower seeds with a water content less than 1o %. For seeds with higher water contents, drying is necessary before the oil content can be determined by pulsed NMR. NOTE 1 This method has been tested with rapeseeds, soya beans, linseeds and sunflower seeds. This does not, however, NOTE 2 The reproducibility values are generally higher than those obtained by the drying method (ISO 665) Normative references The following standards contain provisions which through reference in this text, constitute provisions of this revision, and parties to agreements based on this International Standard are encouraged to investigate the registers of currently valid International Standards. IsO 659:1988, Oilseeds - Determination of hexane extract (or light petroleum extract), called "oil content" IsO 664:1990, Oilseeds Reduction of laboratory sample to test sample. IsO 665:1977, Oilseeds —Determination of moisture and volatile matter content. Principle Insertion of the test sample into the magnetic field of a pulsed NMR spectrometer. Application of an alternating electromagnetic field in the form of an intense 90° radiofrequency (RF) pulse which amplitude of this signal is proportional to the total number of protons from the water and oil phases of the sample. Copyright Inte ional Organization for Standardization 1