BS-EN-24501-1994 ISO-4501-1978.pdf
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1、BRITISH STANDARD BS EN 24501:1994 ISO 4501:1978 Hardmetals Determination of titanium Photometric peroxide method The European Standard EN 24501:1994 has the status of a British Standard UDC 621.762:661.665.2:546.82:543.42 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 09:23:17 GMT+00:00 2006
2、, Uncontrolled Copy, (c) BSI BS EN 24501:1994 This British Standard, having been prepared under the direction of the Iron and Steel Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 January 1994 BSI 12-1999 The following BSI references r
3、elate to the work on this standard: Committee reference ISM/65 Announced in BSI News, January 1993 ISBN 0 580 22157 1 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organization
4、s of the following countries: AustriaOesterreichisches Normungsinstitut BelgiumInstitut belge de normalisation DenmarkDansk Standardiseringsraad FinlandSuomen Standardisoimisliito, r.y. FranceAssociation franaise de normalisation GermanyDeutsches Institut fr Normung e.V. GreeceHellenic Organization
5、for Standardization IcelandTechnological Institute of Iceland IrelandNational Standards Authority of Ireland ItalyEnte Nazionale Italiano di Unificazione LuxembourgInspection du Travail et des Mines NetherlandsNederlands Normalisatie-instituut NorwayNorges Standardiseringsforbund PortugalInstituto P
6、ortugus da Qualidade SpainAsociacin Espaola de Normalizacin y Certificacin SwedenStandardiseringskommissionen i Sverige SwitzerlandAssociation suisse de normalisation United KingdomBritish Standards Institution Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheff
7、ieldun, na, Fri Nov 03 09:23:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 24501:1994 BSI 12-1999i Contents Page Cooperating organizationsInside front cover National forewordii Foreword2 1Scope3 2Field of application3 3Principle3 4Interfering elements3 5Reagents3 6Apparatus3 7Sample preparatio
8、n3 8Procedure3 9Elimination of interferences4 10Preparation of the calibration curve4 11Expression of results4 12Test report5 National annex NA (informative) Committees responsibleInside back cover Table 13 Table 25 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 09:23:17 GMT+00:00 2006, Unco
9、ntrolled Copy, (c) BSI BS EN 24501:1994 ii BSI 12-1999 National foreword This British Standard has been prepared under the direction of the Iron and Steel Standards Policy Committee and is the English language version of EN 24501:1993 Hardmetals Determination of titanium Photometric peroxide method,
10、 published by the European Committee for Standardization (CEN). It is identical with ISO 4501:1978, prepared by Technical Committee 119 “Powder metallurgy” of the International Organization for Standardization (ISO) with the active participation of the UK. This British Standard supersedes BS 5600-4.
11、12:1980 which is withdrawn. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pa
12、ges This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the
13、 inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 09:23:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 24501 October 1993 UDC 621.762:661.665.2:546.82:543.42 Descriptors: Powder metallurgy, hard metals, chemical analysis,
14、determination of content, titanium, spectrophotometric analysis English version Hardmetals Determination of titanium Photometric peroxide method (ISO 4501:1978) Mtaux durs Dtermination du titane Mthode photomtrique au peroxyde (ISO 4501:1978) Hartmetalle Bestimmung des Titangehaltes Photometrische W
15、asserstoffsuperoxidmethode (ISO 4501:1978) This European Standard was approved by CEN on 1993-10-25. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up
16、-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation und
17、er the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherl
18、ands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1993 Copyright reserved to CEN members Ref. No. EN 24501:1993 E Lic
19、ensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 09:23:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 24501:1993 BSI 12-1999 2 Foreword On the proposal of the CEN Central Secretariat, the Technical Board decided to submit the International Standard: Hardmetals Determination of titanium Photomet
20、ric peroxide method (ISO 4501:1978) to the formal vote. The result of the formal vote was positive. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 1994, and conflicting national standards s
21、hall be withdrawn at the latest by April 1994. In accordance with CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal,
22、Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 09:23:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 24501:1993 BSI 12-19993 1 Scope This International Standard specifies a photometric peroxide method for the determination of the titanium conte
23、nt of carbides and hardmetals. 2 Field of application This method is applicable to carbide and binder metal powder mixtures, free of lubricant, all grades of presintered or sintered hardmetals, with a titanium content exceeding 0,2 % (m/m). 3 Principle Formation of a yellow complex of pertitanic aci
24、d. Determination of the absorbance of the complex. 4 Interfering elements The effect of interfering elements which also form coloured complexes with hydrogen peroxide under the conditions specified, for example vanadium and molybdenum, shall be taken into account. A correction can be applied if the
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