BS IS0 11050:2020 BSl Standards Publication Wheat flour and durum wheat semolina - Determination of impurities of animal origin bsi. BSISO11050:2020 BRITISH STANDARD Nationalforeword ThisBritish Standard is theUK implementationof IS011050:2020.It supersedes BS 4317-29:1993, which is withdrawn. The UKparticipation inits preparation was entrustedto Technical CommitteeAw/4, Cerealsandpulses. A listoforganizationsrepresented onthis committee can be obtained on requestto its secretary. This publication does not purportto include all the necessary provisions ofa contract.Users areresponsiblefor its correctapplication. @The British Standards Institution2020 Published by BSI Standards Limited 2020 ISBN9780580941726 ICS 67.060 Compliance with aBritish Standard cannot conferimmunityfrom legal obligations. This British Standard was published under the authority of the StandardsPolicyand Strategy Committeeon30April2020 Amendments/corrigendaissuedsincepublication Date Text affected BS IS0 11050:2020 ISO INTERNATIONAL STANDARD 11050 Second edition 2020-04 Wheat flour and durum wheat semolina - Determination of impurities of animal origin Farinesdebletendreetsemoulesdebledur-Déterminationdes impuretesd'origineanimale Reference number IS011050:2020(E) ISO @IS02020 BSISO11050:2020 IS0 11050:2020(E) COPYRIGHTPROTECTEDDOCUMENT ISO2020 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 any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address below or IsO's member body in the country of the requester: ISO copyright office CP 40i : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone:+4122749 0111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii ISO2020-Allrights reserved BSISO11050:2020 IS0 11050:2020(E) Contents Page Foreword iv 1 Scope .1 2 Normativereferences .1 3 Terms and definitions .1 4 Principle .3 5 Reagents. .3 6 Apparatus. .3 7 Sampling. .5 8 Procedure. 6 8.1 Test portion 6 8.2 Hydrolysis. 6 8.3 Separation of impurities 6 8.4 Filtration 7 8.5 Microscopic examination 7 8.6 Number of determinations. 8 9 .8 Expression of results 10 Repeatability .8 11 Test report .8 AnnexA(informative)Characteristicsoffragmentsfoundonthefilters .9 AnnexB (informative)Test report-Determination ofanimal impurities in accordance with this document .11 .12 AnnexC (informative)Diagramoftheprocedure AnnexD (informative)Chronologyofoperationsand timetable .14 Bibliography .15 @ IS0 2020 - All rights reserved iii BSISO11050:2020 IS0 11050:2020(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,inliaison with Iso,also takepart inthe work ISo collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in theIso/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of Iso documents should be noted. This document was drafted in accordance with the editorial rules of the ISo/IEC Directives, Part 2 (see www.iso.org/directives). 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. Details of any pat