BS ISO BRITISH STANDARD 9683-1:2006 Iron ores Determination of vanadium - Part l: BPHA Spectrophotometric method ICS 73.060.10 BSi British Standards BSIS09683-1:2006 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 9683-1:2006. It supersedes BS 7020-11-1:1993 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ISE/58, Iron ores. A list of organizations represented on ISE/58 can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was Amendmentsissuedsincepublication published under the authority of the Standards Policy and Amd. No. Date Comments Strategy Committee on 30 April 2007 BSI 2007 ISBN9780580504624 BS ISO 9683-1:2006 ISO INTERNATIONAL STANDARD 9683-1 First edition 2006-12-01 Iron ores Determination of vanadium - Part 1: BPHA spectrophotometric method Mineraisdefer-Dosageduvanadium- Partie1:Methodespectrophotometrique ala BPHA Reference number ISO 9683-1:2006(E) ii BSISO9683-1:2006 Contents Page Foreword iv 1 Scope. 2 Normative references. 3 Principle.. Reagents. 5 Apparatus 6 Samplingand samples.. 6.1 Laboratory sample.... 6.2 Preparationofpredriedtestsamples...... 7 7.1 Numberof determinations 7.2 Testportion... 7.3 Blank test and check test... 7.4 7.4.1 Decomposition of thetestportion... 7.4.2 Colourdevelopmentand extraction 7.4.3 Spectrophotometric measurement. 7.4.4 Calibration. 8 Expressionof results. 8.1 Calculationofmassfractionofvanadium. 8.2 General treatment of results... 8.2.1 Repeatability and permissibletolerance. 8.2.2 Determination of analytical result... 8.2.3 Between-laboratoriesprecision. 8.2.4 Checkfortrueness 8.2.5 Calculation of final result. 8.3 Oxidefactor... 9 9 Testreport AnnexA(normative)Flowsheet of theprocedurefortheacceptanceof analytical valuesfortest samples.. 10 AnnexB(informative)Derivationofrepeatabilityandpermissibleequations..... Annex C (informative)Precision data obtained byinternational analyticaltrials.. 12 ili BSISO 9683-1:2006 Foreword ISsO (the International Organization for Standardization) is a worldwide federation of national standards bodies non-governmental, in liaison with isO, also take part in the work. iso collaborates closely with the InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization International Standards are drafted in accordance with the rules given in the IsO/lEC Directives, Part 2 The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO9683-1 was prepared by Technical Committee ISO/TC 102,Iron ore and direct reduced iron, Subcommittee SC 2, Chemical analysis. This first edition of iSO 9683-1 cancels and replaces ISO 9683:1991, which has been technically revised. It Iso 9683 consists of the following part, under the general title Iron ores -Determination of vanadium: Part 1:BPHA spectrophotometric method The following part is under preparation: Part2:Flameatomicabsorptionspectrometricmethod iv BSIS09683-1:2006 IronoresDeterminationofvanadium- Part 1: BPHA spectrophotometric method WARNING-This part of ISo 9683may involve hazardous materials,operations and equipment.This part of Iso 9683 does not purport to address all of the safety issues associated with its use. It is the responsibility of the user to establish appropriate health and safety practices and deter