ISO INTERNATIONAL STANDARD 10698 First edition 1994-05-15 Steel Determination of antimony content Electrothermal atomic absorption spectrometric method Aciers - Dosage de I'antimoine - Méthode par spectrométrie d'absorption atomique a excitation électrothermique ISO Reference number ISO 10698:1994(E) No reproduction or networking permitted without license from IHS Not for Resale ISO 10698:1994(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through IsO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison 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 by at least 75 % of the member bodies casting a vote. ISO/TC17. Steel, Subcommittee S 1, Methods of determination of chemicalcomposition. and C are for information only. ISO1994 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization CasePostale56·CH-1211Geneve20·Switzerland Printed in Switzerland i Covioht yie No reproduction or networking permitted without license from IHS Not for Resale INTERNATIONAL STANDARD ISO ISO 10698:1994(E) Steel Determination of antimony content - Electrothermal atomic absorption spectrometric method 1 Scope ISO 5725:1986, Precision of test methods Deter mination of repeatabilityand reproducibility for a This International Standard specifies an electrothermal standard test method by inter-laboratory tests. atomic absorption spectrometric methodfor the de termination of the antimony content in steel. 3 Principle The method is applicable to antimony contents be- Dissolution of a test portion in hydrochloric and nitric tween 0,0005 % (m/m) and 0,010 % (m/m). acids and dilution of the solution to a known volume. Introduction of a known volume of the solution into an electrothermal atomizer of an atomic absorption spectrometer. 2 Normative references Measurement of the atomic absorption of the 217,6 nm spectral resonance line energy emitted by The following standards contain provisions which, an antimony lamp, using background correction. through reference in this text, constitute provisions of this International Standard. At the time of publi- Calibration by the standard additions technique. cation, the editions indicated were valid. All standards are subject to revision, and parties to agreements 4Reagents based on this International Standard are encouraged to investigate the possibility of applying the most re- During the analysis, unless otherwise stated, use only cent editionsof the standardsindicatedbelow. reagents of recognized analytical grade and only grade Members of IEC and ISO maintain registers of cur- 3 water as specified in ISO 3696. rently valid International Standards. 4.1 Nitric acid, p about 1,40 g/ml. ISO 377-2:1989, Selection and preparation of samples and test pieces of wrought steels Part 2: Samples for the determination of the chemical composition. 4.2 Hydrochloric acid, p about 1,19 g/ml. IsO 385-1:1984, Laboratory glassware - Burettes - 4.3 Orthophosphoric acid (H,PO4)， p about Part 1: General requirements. 1,71 g/ml. IsO 648:1977, Laboratory glassware - One-mark 4.4 Nitric acid, p about 1,40 g/ml, diluted 1 + 1. pipettes. 4.5 Antimony, standard so