BS ISO BRITISH STANDARD 9517:2007 Iron ores Determination of water-soluble chloride Ion-selective electrode method ICS 73.060.10 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards BSISO 9517:2007 National foreword This British Standard was published by BSI. It is the UK implementation of IS0 9517:2007.It supersedes BS 7020-20:1990 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ISE/58, Iron ores. A list of organizations represented on this committee 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 Date Amd. No. Comments Strategy Committee on31May2007 @BSI 2007 ISBN9780580507830 BSIS09517:2007 ISO INTERNATIONAL 9517 STANDARD Second edition 2007-02-01 Iron ores Determination of water-soluble chloridelon-selective electrode method Minerais de fer- DosagedeschloruressolublesdansI'eau- Méthodeparélectrodesélectivedesions Referencenumber ISO 9517:2007(E) i BS ISO 9517:2007 Contents Page Foreword. 1 Scope 2 Normative references 3 Principle. 4 Reagents... 5 Apparatus 6 Sampling and samples.. 6.1 Laboratory sample... 6.2 Preparationof predried test samples. 7 Procedure.... 7.1 Number of determinations 7.2 Blank test and check test.. 7.3 Temperature setting. 7.3.1 Magnetic stirrer/hotplate. 7.3.2 Laboratoryhotplate 7.4 Preliminary tests... 7.4.1 Electrode-systemchecktest 7.4.2 Contamination check test .... 7.5 Test portion... 7.6 Determination.. 7.6.1 Leaching of water-soluble chloride 7.6.2 7.6.3 Treatment ofthetest solution 7.6.4 Measurement of electrode potential... 7.6.5 Preparation of calibration graph .... 7.6.6 Measurementofchlorideconcentration. 8 Expression of results.... 8.1 Calculationof mass fractionofwater-solublechloride.... 8.2 General treatment of results... 8.2.1 Repeatabilityandpermissibletolerance. 8.2.2 Determinationofanalyticalresult... 8 8.2.3 Between-laboratories precision.. 8.2.4 Check for trueness....... 8.2.5 Calculation of final result... 9 Test report.... AnnexA(normative)Flowsheet of theprocedure for the acceptance ofanalytical values fortest samples... 11 Annex B(informative)Derivation of repeatabilityand permissible tolerance equations... AnnexC(informative)Graphicalpresentation of precisiondataobtainedby international analytical trials............ ili BSIS09517:2007 Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technical committees. Each member body interested in a subject for which a technical committee has been 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 ISO 9517 was prepared by Technical Committee ISO/TC 102, Iron ore and direct reduced iron, Subcommittee SC 2, Chemical analysis. Thissecondeditioncancelsandreplacesthefirstedition(lsO9517:1989),whichhasbeentechnicallyrevised It has been updated to alter the manner in which precision data are presented. iv BS ISO 9517:2007 IronoresDeterminationof water-solublechloride- lon-selectiveelectrodemethod WARNING -This International Standard may involve hazardous materials, operations and equipment. This Internatio