ha-STte 55hT200E06T52h (iso 315 International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEXKAYHAPOAHAR OPTAHM3AUMH HO CTAHAAPTW3AUWV·ORGANISATION INTERNATIONALE DE NORMALISATION Manganese ores and concentrates -- Determination of nickel content - Dimethylglyoxime spectrometric method and flame atomic absorption spectrometric method Minerais et concentrés de manganese - Dosage du nickel - Methode spectrometrique a la dimethylglyoxime et methode par spectrometried'absorption atomiquedans la flamme First edition - 1984-06-01 UDC553.32:543.422:546.74 Ref.No.ISO315-1984 (E) () Descriptors : minerals and ores, metaliferous minerals, manganeseores, . concentrates, chemical analysis, determination of content, nickel, spectrophotometricanalysis,atomic absorptionmethod. Price based on 6 pages Copyright by the International Organization For Standardization 4851903 0021456 7 h-5TE Foreword ISo (the International Organization for Standardization) is a worldwide federation of national standards bodies (iso member bodies). The work of developing International Standards is carried out through Iso technical committees. Every member body 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. International Standard ISO 315 was developed by Technical Committee ISo/TC 65, Manganese and chromium ores, and was circulated to the member bodies in February1983. It has been approved by the member bodies of the following countries: Austria Italy South Africa, Rep. of Bulgaria Japan Thailand China Mexico United Kingdom Czechoslovakia Netherlands USSR France Poland Germany,F.R. Romania The member body of the following country expressed disapproval of the document on technical grounds: Australia This International Standard cancels and replaces IS0 Recommendation R 315-1963, of which it constitutes a technical revision, @International Organization for Standardization, 1984 Printed in Switzerland h-STE 485190300214579 INTERNATIONAL STANDARD ISO315-1984 (E) Manganese ores and concentrates - Determination of nickel content -- Dimethylglyoxime spectrometric method and flame atomic absorption spectrometric method Scope and field of application Separation of manganese in'the form of manganese dioxide. This International Standard specifies two methods for the Spectrometric determination at 460 to 470 nm in the presence determination of the nickel content of manganese ores and of tartaric acid, sodium hydroxide, ammonium persuifate and concentrates dimethylglyoxime. method A: -dimethylglyoxime spectrometric method, 3.2 Reactions applicable to products having a nickel content of 0,01 to 1,0%(m/m); The method is based on the interaction of nickel ions with method B: flame atomic absorption spectrometric method, dimethylglyoxime in an alkaline medium (pH 10 to 11) in the presence of ammonium persulfate with the formation of a applicable to products having a nickel content of 0,005 to coloured complex. Iron and other elements are prevented from 1,0% (m/m). interfering with the reaction by the formation of soluble com- This International Standard should be read in conjunction with plexes with tartaric acid. Manganese is separated in the form of ISO4297. manganese dioxide. 3.3 Reagents 2References 3.3.1 Potassium bromate (KBrO3) ISO 4296/1, Manganese ores - Sampling - Part 1: Increment sampling. 3.3.2 Potassium disulfate (K2S207). 3.3.3 Hydrochloric acid, @ 1,19 g/ml. aration ofsamples. Iso 4297, Manganese ores and concentrates - Methods of 3.3.4 Sulfuric acid, diluted 1 + 4. chemical analysis --. General instructions. 3.3.5 Sulfuric acid, diluted 1 + 20. 3 Method A: Dimethylglyoxime 3.3.6 Hydr