ISO INTERNATIONAL STANDARD 25761 Secondedition 2014-03-01 Plastics Polyols for use in the production of polyurethanes Determination of basicity (total amine value), expressed as percent nitrogen Plastiques-Polyalcoolsutiliséspourlaproductionde polyuréthannes-Détermination dela basicité (valeurtotale d'amines) en pourcentage d'azote Reference number ISO 25761:2014(E) LSO @IS02014 IS025761:2014(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2014 All rights reserved. Unless otherwise specified, 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 Casepostale 56.CH-1211Geneva20 Tel. +4122 749 0111 Fax +4122749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii Provided by IHS underlicense with ISO @ IS0 2014 - All rights reserved IS025761:2014(E) Contents Page Foreword ..iv Introduction. .. 1 Scope.. 2 Normative references 3 Terms and definitions 4 Principle .1.2 5 Sampling.. .2 6 Apparatus. 1.2 7 Interference .2 8 Reagents .2 9 Procedure. 1.3 10 Expression of results .4 11 Precision and bias .4 11.1 General ..4 11.2 Precision. .5 11.3 Bias.. ..5 12 Test report 5 AnnexA (informative)Determination ofthefactorFfor O,1mol/lperchloric acid in acetic acid....6 Bibliography 7 @ IS0 2014 -All rights reserved iii