ISO INTERNATIONAL STANDARD 23392 First edition 2006-09-01 Fresh and quick-frozen maize and peas Determination of alcohol-insoluble solids content Maisetpetitspoisfrais etcongeles-Determinationdelateneuren résidusinsolublesdansIalcool Referencenumber ISO 23392:2006(E) @ISO2006 ISO23392:2006(E) PDF disclaimer 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 @ISO2006 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 Casepostale 56.CH-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ISO 23392:2006(E) Contents Page Foreword 1 Scope 2 Termsanddefinitions 3 Principle. 4 Reagents 5 Apparatus. 6 Procedure 6.1 Sample preparation .. 6.1.1 Preparation of fresh or quick-frozen peas 6.1.2 Preparation of fresh or quick-frozen maize. 6.2 Determination.... 6.3 Numberofdeterminations.. 7 Calculation and expression of results.. 7.1 Calculation...... 7.2 Expressionofresults.. 8 Repeatability 9 Testreport ISO 23392:2006(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 International Electrotechnical Commission (IEC)on allmatters 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 memberbodies castinga 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. ISO23392waspreparedbyTechnical CommitteeISO/TC34,Food Products,SubcommitteeSC14,Fresh, dryanddriedfruitsandvegetables. ISO 23392:2006(E) INTERNATIONALSTANDARD Fresh and quick-frozen maize and peas Determination of alcohol-insolublesolidscontent 1 Scope This International Standard specifies a method for the determination of the alcohol-insoluble solids content of fresh or quick-frozen peas and maize, as well as whole kernel maize. Terms and definitions 2 For the purposes of this document, the following terms and definitions apply 2.1 alcohol-insoluble solids content whole of the compounds determined by the method specified in this International Standard and expressed as apercentagebymass Principle A properly prepared test portion is boiled with ethanol, followed by filtration and washing the solids with ethanol unti the filtrate is clear. The alcohol-insoluble solids are dried and weighed. The result is used as a guide to maturity index. 4 Reagents Use only reagents of recognized analytical grade, unless otherwise specified, and distilled or demineralized water or water of equivalent purity. 4.1 Ethanol, a volume fraction of 95% denatured with a volume fraction of 5 % methanol. 4.2 Diluted ethanol,