ISO INTERNATIONAL STANDARD 12492 First edition 2012-10-01 Rubber, raw Determination of water content by Karl Fischer method Caoutchouc brut - Détermination de la teneur en eau par la méthodedeKarl Fischer Reference number ISO 12492:2012(E) LSO IS02012 IHS under itted without license from IHS Not for Resale IS0 12492:2012(E) COPYRIGHTPROTECTEDDOCUMENT ISO2012 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 addressbeloworIso'smemberbodyinthecountryoftherequester. ISO copyright office Case postale 56:CH-1211 Geneva 20 Tel.+41227490111 Fax +41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ IS0 2012 - All rights reserved No reproduction networking permited without license from IHS Not for Resale IS0 12492:2012(E) Contents Page Foreword ..iv Introduction. ... 1 Scope. ..1 2 Normative references 3 Principle 4 Reagents. ..2 5 Apparatus. ..2 6 Calibration 7 Sampling and preparation of test piece ..3 8 Procedure. ..3 8.1 Poweron. 8.2 Selection of the generator electrode ..4 8.3 Filling the electrolysis cell ..4 8.4 Equipment check. .4 8.5 Analysis. .5 9 Precision .6 10 Test report .6 Annex A (normative) Calibration schedule 7 iii ded by IHS under lic ense with ISt ed without license from IHS Not for Resale