ISO INTERNATIONAL STANDARD 8292-1 First edition 2008-04-01 Animalandvegetablefatsandoils Determination of solid fat content by pulsed NMR - Part 1: Direct method Corps gras d'origines animale et vegetale-Determination de la teneur encorpsgrassolidesparRMNpulsee- Partie 1: Methode directe Reference number ISO 8292-1:2008(E) @1SO2008 ISO8292-1:2008(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 file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area Adobe is a trademark of 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 COPYRIGHTPROTECTEDDOCUMENT ISO2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, ISO's member body in the country of the requester. ISO copyright office Casepostale56.CH-1211Geneva20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ISO 8292-1:2008(E) Contents Page Foreword 1 Scope 2 Normative references.... 3 Terms and definitions 4 Symbolsandabbreviatedterms 5 Principle.. 6 Apparatus 7 Sampling. 8 Procedure 8.1 Measurementprotocolandtestsample.. 8.2 Oven,waterbathsandtemperature-controlledblocks 8.3 Determinationoftheconversionfactor (where necessary) 8.4 NMR spectrometer.. 8.5 Filling the measurement tubes.. 8.6 Removing thethermal history. 8.7 Equilibrating atthe initial temperature 8.8 Crystallization and tempering.... 8.9 Measuring the SFC 8.10 Numberofdeterminations 8.11 Cleaning the measurement tubes 10 9 Expressionofresults .10 10 Precision.. 10.1 Interlaboratorytest 11 10.2 Repeatability.. 10.3 Reproducibility. 11 Testreport 12 AnnexA(informative)Results of interlaboratorytests 13 AnnexB (informative)Theory of the direct method.... AnnexC (informative)Additionalmeasurementprotocols. Bibliography ISO 8292-1:2008(E) Foreword IsO (the International Organization for Standardization)is a worldwide federation of national standards bodies International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards. 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 document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO8292-1waspreparedbyTechnical CommitteeISO/TC 34,Food products,SubcommitteeSC 11,Animal and vegetablefats and oils. ThispartofISO 8292,together withISO8292-2, canceland replace ISO 8292:1991. Determination of solid fat content by pulsed NMR: Part1:Directmethod Part 2: Indirect method INTERNATIONALSTANDARD ISO 8292-1:2008(E) Animal and vegetable fats and oils Determination of solid fat contentbypulsedNMR Part 1: Direct method 1 Scope This part of isO 8292 specifies a direct method for the determination of solid fat content in animal and vegetable fats and oils (hereafter designated"fats")using low-resolution pulsed nuclear magnetic resonance (NMR) spectrometry. exhibit pronounced polymorphism and stabilize in the β-polymorph. Additional thermal pre-treatments, which may be more suitable for specific purposes, are given in an informative annex. The direct method is easy to carry