7627/5 International Standard (TSO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION+MEXAYHAPOAHAR OPTAHM3AUMANO CTAHAAPTM3AUWMORGANISATION INTERNATIONALE DE NORMALISATION Hardmetals --- Chemical analysis by flame atomic absorption spectrometry Part 5: Determination of cobalit, iron, manganese, molybdenum, nickel, titanium and vanadium in contents from 0,5 to 2 % (m/m) Metaux-durs - Analyse chimique par spectrometrie d'absorption atomique dans la flamme - Partie 5: Dosage du cobalt, du fer, du manganese, du molybdene, du nickel, du titane et du vanadium a des teneurs comprises entre 0,5 et 2 % (m/m) First edition - 1983-10-15 UDC 669.018.25 : 643.422 Ref.No.1SO7627/5-1983(E) 7627/5-1983 Descriptors: hardmetals, chemical analysis, determination of content, cobalt, iron, manganese, molybdenum, nickel, titanium, vanadium, atomicabsorption spectrometry. OSI Price hased on 2 pages Foreword ISo (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of developing International interested in a subject for which a technical committee has been authorized 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. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. Committee ISO/TC 119, Powder metallurgy, and was circuiated to the member bodies in August 1982. It has been approved by the member bodies of the following countries : Austria Germany, F.R. Sweden Brazit Italy Switzerland Bulgaria Korea, Rep.of United Kingdom China Norway USA Czechosiovakia Romania USSR Egypt, Arab Rep. of South Africa, Rep. of France Spain No member body expressed disapproval of the document. @ International Organization for Standardization, 1983 Printed in Switzerland ISO 7627/5-1983 (E) INTERNATIONAL STANDARD Hardmetals -- Chemical analysis by flame atomic absorption spectrometry Part 5: Determination of cobalt, iron, manganese, molybdenum, nickel, titanium and vanadium in contents from 0,5 to 2 % (m/m) Scope and field of application 4 Procedure ThispartofISO7627specifiesthemethodtobeusedforthe 4.1 Test portion determination of cobalt, iron, manganese, molybdenum, nickel,titaniumand vanadiumcontentsofhardmetalswithin Weigh, to the nearest 0,001 g, approximately 1 g of the test the range 0,5 to 2 % (m/m) by flame atomic absorption sample.Transferittoa100mlpolytetrafluorethylenebeakeror spectrometry. a beaker of other suitable material. Cover the beaker. General requirements concerning the field of application, prin- ciple, interfering elements, apparatus, sampling and test report 4:2 Dissolution of the test portion are given in Iso 7627/1. Add 10 ml of water, 5 ml of the hydrofluoric acid (3.1). and NOTE - Determination of element contents in high concentration by then5ml ofthenitricacid(3.2),dropbydrop,tothebeaker the atomic absorption spectrophotometry method yields a wider scat- containing the test portion (4.1) and heat gently until the test tering of results than are obtainable by other methods, i.e. Iso 3909, portion is completely dissolved. Add 10'ml of the caesium 4501,4503and4883.See also clause 4.2. chloride solution (3.4) and 10 ml of the ammonium fluoride solution(3.3).Thentransferthesolutiontotallytoa100ml polypropylene one-mark volumetric flask and dilute to the 2 Reference mark. ISo 7627/1, Hardmetals - Chemical analysis by flame atomic 4.3 Dilution volume absorption spectrometry - Part 1: General requirements. Prepare the relevant dilution volume for the analysis according to table 1 in the following way. 3 Reagents 4.3.1 Dilution volume 100 ml: use the solution in 4.2. 3.1 Hydrofluoric acid, @ 1,12 g/ml. 4.3.2 The concentration of the solution may be reduced by a factorof1forinstrumentsofhighersensitivitybytransferring 3.2 Nitri