ISO INTERNATIONAL STANDARD 15353 First edition 2001-03-15 Steel and iron Determination of tin content Flame atomic absorption spectrometric method (extraction as Sn-SCN) Aciers etfontesDosage deI'étain-Methode parspectrometrie dabsorptionatomiquedanslaflamme(extractioncommeSn-SCN) Referencenumber ISO 15353:2001(E) ISO @ISO 2001 ISO15353:2001(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file parties accept therein the responsibility of not infringing Adobe's licensing policy. The IsO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event ISO2001 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, elec- tronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's mem- ber body in the country of the requester. ISO copyright office Case postale 56·CH-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.ch Printed in Switzerland ii @ IsO 2001 - All rights reserved ISO15353:2001(E) Contents Page 1 Scope 1 Normative references 1 3 Principle Reagents 1 5 Apparatus 3 6 Sampling . 3 7 Procedure 4 8 Plotting the calibration graph 6 9 Expression of results 6 10 Test report Annexes A Additional information on the international co-operativetest. 8 Graphical representation of precision data........... 9 @ ISO 2001 - All rights reserved ii ISO15353:2001(E) Foreword ISO(the International Organizationfor Standardization)is aworldwidefederation of nationalstandardsbodies (isO mittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhasthe son with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting Publication as an International Standard requires approval byatleast 75%of the memberbodies casting avote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of International Standard ISO15353 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 1, Methodsofdetermination ofchemicalcomposition. Annexes A and B of this International Standard are for information only iv @ Is0 2001 - All rights reserved ISO15353:2001(E) 4.2 Hydrochloric acid, HCl, p approximately 1,19 g/ml 4.3 Hydrochloric acid, HCl, diluted 1 + 1. 4.4 Nitric acid, HNO3 , p approximately 1,40 g/ml. 4.5 Formic acid, HCOOH, p approximately1,21g/ml. 4.6 Hydrochloric acid, HCl, diluted 1 + 24. 4.7Ascorbic acid, C6HgO6 4.8 Potassium thiocyanate solution Dissolve 25 g of potassium thiocyanate (KSCN) in water (4.1), dilute to 50 ml and mix. Prepare the solution shortly before use. 4.94-methyl-2-pentanone (isobutyl methyl ketone), (CH3)2 CHCH2COCH3 4.10 Washing solution. Dissolve 45 g of ascorbic acid (4.7) and 25 g of potassium thiocyanate in 500 ml of hydrochloric acid (4.6). Prepare the solution shortly before use. 4.11 Tin, standard reference solution 4.11.1 Stock solution, corresponding to 1 g of tin per litre. beaker and dissolve in 20 ml of hydrochloric acid (4.2) and 5 ml of nitric acid (4.4). Warm gently. Remove from the hot flask containing 100 ml hydrochloric acid (4.2). D