ISO INTERNATIONAL 17226-2 STANDARD IULTCS/IUC 19-2 Second edition 2018-12 Leather Chemical determination of formaldehyde content - Part 2: Method using colorimetric analysis Cuir-Dosagechimique duformaldéhyde- Partie2:Méthodeparanalyse colorimétrique Reference numbers IS017226-2:2018(E) IULTCS/IUC19-2:2018(E) @ IS0 2018 IS017226-2:2018(E) IULTCS/IUC 19-2:2018(E) COPYRIGHTPROTECTEDDOCUMENT IS02018 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 below or Iso's member body in the country of the requester. ISO copyright office CP 401 : 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 @ IS0 2018 - All rights reserved IS0 17226-2:2018(E) IULTCS/IUC19-2:2018(E) Contents Page Foreword ..iv 1 Scope ..1 2 Normativereferences ..1 3 Terms and definitions 4 Conformance ..2 5 Principle 6 Reagents. .2 6.1 Reagents for the formaldehyde stock solution .2 6.2 Reagents for the colorimetric method. .2 7 Apparatus .2 8 Procedures .3 8.1 Procedureforthedetermination offormaldehydein the stock solution .3 8.1.1 Preparationoftheformaldehyde stock solution 3 8.1.2 Determination. 3 8.2 Procedure forthe determination offormaldehyde in leatherbythe colorimetric method.4 8.2.1 Samplingandpreparationofsamples 8.2.2 Extraction. .4 8.2.3 Reactionwithacetylacetone. 4 8.2.4 Checking reagents for absence of formaldehyde .4 8.2.5 Testingothercompoundswhichcauseacolouringwithacetylacetone 4 8.2.6 Calibration. .5 8.2.7 Calculationofthecontentofformaldehydeoftheleathersample .5 8.2.8 Spiking and recovery rate .5 9 Expression ofresults .6 10 Test report .6 AnnexA(informative)Precision:reliabilityofthecolorimetricmethod 8 IS0 2018-Allrights reserved ili