ISO INTERNATIONAL STANDARD 2561 Fourth edition 2023-11 Plastics Determination of residual styrene monomer in polystyrene (Ps) and impact-resistant polystyrene (PS- I) by gas chromatography Plastiques - Détermination du styrene monomere résiduel dans le polystyrene (PS) et le polystyrene résistant au choc (PS-I) par chromatographieenphasegazeuse Reference number IS0 2561:2023(E) ISO @IS02023 IS0 2561:2023(E) COPYRIGHT PROTECTED DOCUMENT @IS02023 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 orIso'smemberbodyinthecountryoftherequester. ISO copyright office CP401·Ch.deBlandonnet8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email:[email protected] Website: www.iso.org Published in Switzerland .ii @IS0 2023-All riohts reserved