ISO INTERNATIONAL STANDARD 13900 First edition 1997-08-15 Steel - Determination of boron content -- Curcumin spectrophotometric method after distillation Aciers - Dosage du bore -- Methode spectrophotometrique a la curcumine apres distillation ISO Reference number ISO 13900:1997(E) Not for Resale ISO13900:1997(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 Methodsofdeterminationofchemical composition. Annexes A to C of this International Standard are for information only. @ISO1997 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 Case postale 56 . CH-1211 Geneve 20 Switzerland Internet central@iso.ch X.400 C=ch; a=400net; p=iso; o=isocs; S=central Printed in Switzerland cense from IHS Not for Resale INTERNATIONAL STANDARD @ISO ISO 13900:1997(E) Steel - Determination of boron content -- Curcumin spectrophotometric method after distillation 1 Scope This International Standard specifies a method for the determination of the boron content in steel using a curcumin spectrophotometric method after distillation. The method is applicable to a boron content of between 0,000 05 % (m/m) and 0,001 0 % (m/m), 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.Members of IEC and ISO maintain registers of currently valid International Standards. IsO 385-1:1984, Laboratory glassware - Burettes — Part 1: General requirements. Iso 648:1977, Laboratory glassware - One-mark pipettes. ISO 1042:--1), Laboratory glassware - One-mark volumetric flasks. Iso 3696:1987, Water for analytical laboratory use - Specification and test methods. principles and definitions. IsO 5725-2:1994, Accuracy (trueness and precision) of measurement methods and results -- Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method. IsO 5725-3:1994, Accuracy (trueness and precision) of measurement methods and results Part 3: Intermediate measures of the precision of a standard measurement method. Iso 14284 :1996, Steel and iron -- Sampling and preparation of samples for the determination of chemical composition. 3 Principle Dissolution of a test portion in hydrochloric and nitric acids. 1)To be published. (Revision of ISO 1042:1983) onal Organization for Standardization