ISO INTERNATIONAL STANDARD 9647 Second edition 2020-02 Steel Determination of vanadium content Flame atomic absorption spectrometric method (FAAS) Aciers-Determination desteneurs en vanadium-Méthode par spectrometrie d'absorption atomiquedans laflamme (SAAF) Reference number IS0 9647:2020(E) ISO @ IS0 2020 IS0 9647:2020(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2020 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may 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 CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone:+41227490111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2020 - All rights reserved IS09647:2020(E) Contents Page Foreword iv 1 Scope 1 2 Normative references. .1 3 Terms and definitions .1 4 Principle .1 5 Reagents. .2 6 Apparatus. .3 6.1 Atomicabsorptionspectrometer 3 6.1.1 Minimumprecision (seeAnnexC) 3 6.1.2 Limit of detection (see Annex C) 3 6.1.3 Calibrationlinearity (seeAnnexC) 3 6.1.4 Characteristic concentration (see Annex C) 3 6.2 Ancillary equipment. 4 7 Sampling .4 8 Procedure 4 8.1 Test portion. 4 8.2 Blanktest. 4 8.3 Determination 4 8.3.1 Preparation of the test solution 4 8.3.2 Preparationofthecalibrationsolutions. 4 8.3.3 Adjustmentoftheatomicabsorption spectrometer. 5 8.3.4 Spectrometric measurements. 6 9 Expression ofresults .7 9.1 Use of the calibration curve 7 9.2 Use of bracketing method. 8 10 Precision .8 11 .9 Test report Annex A (informative)Additionalinformationon theinternationalinterlaboratorytest .10 AnnexB (informative)Graphicalrepresentationofprecisiondata .13 Annex C (normative) Proceduresfor the determination of instrumental criteria. .14 Bibliography .16 @ IS0 2020 - All rights reserved iii