ISO INTERNATIONAL STANDARD 9683-2 First edition 2009-06-15 Iron ores Determination of vanadium Part 2: Flame atomic absorption spectrometric methods Minerais de fer- Dosage du vanadium - Partie 2: Methodes par spectrometrie d'absorption atomique dans la flamme Reference number ISO 9683-2:2009(E) @ ISO 2009 THS under ted without license from IHS Not for Resale ISO 9683-2:2009(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 that a problem relating to it is found, please inform the Central Secretariat at the address given below COPYRIGHTPROTECTEDDOCUMENT ISO2009 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, ISsO's member body in the country of the requester. ISO copyright office Case postale 56 . CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ IS0 2009 - All rights reserved T by IHS unde I without license from IHS Not for Resale ISO 9683-2:2009(E) Contents Page Foreword .iv 1 Scope 2 Normative references 3 Principle... 3.1 Dissolution.. 3.2 Determination . 3.2.1 Extraction (Method 1 only) .... 3.2.2 Measurement (Methods 1 and 2).... 4 Reagents 5 Apparatus. 6 Sampling and samples. 6.1 Laboratorysample 6.2 Preparation of predried test samples..... 7 7.1 Number of determinations .5 7.2 Safety precautions . 7.3 Test portion.. 7.4 Blank test and check test .... 7.5 Determination Method 1 (mass fraction of vanadium between 0,004 % and 0,06 %).. 7.5.1 Decomposition of the test portion.... 7.5.2 Dissolution of salts and residue treatment... 7.5.3 Extraction of vanadium.................... 7.5.4 Adjustment of the atomic absorption spectrometer..... 7.5.5 Atomic absorption measurements ... 7.6 Determination Method 2 (mass fraction of vanadium between 0,o6 % and 0,5 %)..... 7.6.1 Decomposition of the test portion..... 7.6.2 Dissolution of salts and residue treatment... 8 Expression of results... 8.1 Caiculation of mass fraction of vanadium .. 8.2 General treatment of results....... 8.2.1 Repeatability and permissible tolerance... 8.2.2 Determination of analytical result.... 8.2.3 Between-laboratories precision... 8.2.4 Check for trueness ... 8.2.5 Calculation of final result.. 10 8.3 Oxide factor......... 10 9 Test report.... 10 Annex A (normative) Flowsheet of the procedure for the acceptance of analytical values for test .11 Annex B (informative) Derivation of repeatability and permissible tolerance equations.. 12 Annex C (informative) Precision data obtained by international analytical trials ........13 CopyrightInternatinal Oorganizain forstandardizalirnghts reserved ii ted withoutlicensefromIHS Not for Resale