ISO INTERNATIONAL STANDARD 18068 First edition 2014-08-15 Cotton fibres Test method for sugar content Spectrophotometry Fibres de coton - Methode d'essai pour la teneur en sucre - Spectrophotométrie Referencenumber IS0 18068:2014(E) IS0 2014 IS0 18068:2014(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2014 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 Case postale 56· CH-1211 Geneva 20 Tel. + 4122 749 0111 Fax +4122 7490947 E-mail [email protected] Web www.iso.org Published in Switzerland 2 @ IS0 2014 - All rights reserved nnurinht Int IS0 18068:2014(E) Contents Page Foreword .iv Introduction. v 1 Scope 1 2 Normative references 1 3 Terms and definitions 4 Principle 5 Apparatus. 6 Reagents 2 7 Sampling. 8 Procedure. 3 8.1 Blanktest 3 8.2 Calibration curve preparation 3 8.3 Determination of sugar content for test specimens 4 9 Calculation and expression of the results 4 10 Test report. sn2014All rights reserved 3