ISC INTERNATIONAL STANDARD 10697-1 First editio 1992-02-1 Steel --- Determination of calcium content by flame atomic absorption spectrometry -- Part 1: Determination of acid-soluble calcium content Aciers -- Dosage du calcium par spectrometrie d'absorption atomique danslaflamme Partie 1: Dosage du calcium soluble dans I'acide Reference numbe ISO 10697-1:1992(I CyemainalganizatnfSandadization No reproduction or networking permitted without license from IHS Not for Resale ISO 10697-1:1992(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, govern- mental 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 Inter- national Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard Iso 10697-1 was prepared by Technical Commit- tee ISO/TC 17, Steel, Sub-Committee SC 1, Methods of determination of chemicalcomposition. Iso 10697 consists of the following parts, under the general title Steel -- Determination of calcium content by flame atomic absorption spectrometry Part 1: Determination of acid-soluble calcium content Part 2: Determination of total calcium content C are for information only. C ISO 1992 orby anymeans,electronic ormechanical,includingphotocopyingandmicrcfilm,without permission in writing from the publisher. International Organization for Standardization Case Postale56·CH-1211Geneve 20·Switzerland Printed in Switzerland Standardizatior Not for Resale ISO 10697-1:1992(E) INTERNATIONAL STANDARD Steel -- Determination of calcium content by flame atomic absorption spectrometry Part 1: Determination of acid-soluble calcium content 1 Scope ISO5725:1986.Precisionoftestmethods---Determi- nation of repeatability and reproducibility for a stan- This part of Is0 10697 specifies a flame atomic ab- dard test method by inter-laboratory tests. sorption spectrometric method for the determination of acid-soluble calcium content in steel. 3 Definition The method is applicable to calcium contents be- For the purposes of this part of Iso 10697, the fol- tween 0,0005 % (m/m) and 0,003 % (m/m). lowing definition applies. 3.1 Acid-soluble calcium: Calcium dissolved in the acidsspecified in 8.3.1 2 Normative references 4Principle The following standards contain provisions which. Dissolution of a test portion in hydrochloric and through reference in this text, constitute provisions of this part of isO 10697. At the time of publication nitric acids. the editions indicated were valid. All standards are Addition of potassium chloride/lanthanum nitrate subject to revision, and parties to agreements based solution as a spectrochemical buffer. on thispartof iso10697are encouragedtoinvesti- gate the possibility of applying the most recent edi- Spraying of the solution into a dinitrogen monoxide tions of the standards indicated below. Members of acetylene flame. IEC and IsoO maintain registers of currently valid International Standards. Spectrometric measurement of the atomic absorp- tion of the 422,7 nm spectral line emitted by a Iso 377-2:1989, Selection and preparation of samples calcium hollow cathode lamp. and test pieces of wrought steels --- Part 2: Samples for the determination of the chemical composition. Reagents Iso 385-1:1984, Laboratory glassware -- Burettes - During the analysis, unless otherwise stated, use Part 1: General requirements. only reagent