ISO INTERNATIONAL STANDARD 11535 Second edition 2006-12-15 Iron ores Determination of various elements Inductively coupled plasma atomic emission spectrometric method Minerais de fer Dosage de divers élements Methode par spectrometrie d'émission atomique avec plasma induit par haute frequence Reference number ISO 11535:2006(E) @ ISO 2006 ISO11535:2006(E) Contents Page Foreword 1 Scope 2 Normative references 3 Principle. 4 Reagents 5 Apparatus 6 Sampling and samples. 6.1 Laboratory sample. 6.2 Preparation of predried test samples ... Procedure. 7.1 Number of determinations 7.2 Test portion. 7.3 Blank test and check test.... 7.4 7.4.1 Decomposition of the test portion . 7.4.2 Adjustment of spectrometer. 7.4.3 Measurements. 8 Calculation of results 8.1 Calibration graph .... 8.2 Correction of spectral interference 8.3 Standardization of calibration graph (drift correction) 8.4 Generaltreatmentofresults. 0 8.4.1 Repeatabilityandpermissibletolerances 10 8.4.2 Determination of analytical result . 10 8.4.3 Check for trueness . 8.4.4 Calculation of final result. 8.5 Oxidefactors 12 9 Test report . 12 Annex A (informative) Suggested calibration solutions .... Annex B (normative) Plasma-spectrometer performance tests.... Annex C (normative) Flowsheet of the procedure for the acceptance of analytical values for test samples..... 18 Annex D (informative) Derivation of repeatability and permissible tolerance equations ... .19 Annex E (informative) Precision data obtained by internationai anaiyticai triais.. .20 ii ISO 11535:2006(E) 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 beer established 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. IsO collaborates closely with the InternationalElectrotechnicalCommission(iEC)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. ISO 11535 was prepared by Technical Committee ISO/TC 102, Iron ore and direct reduced iron, Subcommittee SC 2, Chemical analysis. This second edition cancels and replaces the first edition (IsO 11535:1998), which has been technically revised. It has been updated to alter the manner in which the precision data are presented. ISo 2006 - All rights reserved INTERNATIONAL STANDARD ISO11535:2006(E) Iron ores Determination of various elements Inductively coupled plasma atomic emission spectrometric method WARNING - This International Standard may involve hazardous materials, operations and equipment. This International Standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this International Standard to establish appropriate health and 1 Scope This International Standard specifies a method for the determination of aluminium, calcium, phosphorus, spectrometry (ICP-AES). and agglomerates, including sinter products. Table 1 Mass-fraction ranges Element Range of mass fractions % Al 0,07 to 3,30 Ca 0,012 to 6,80 Mg 0,008 to 1,90 Mn 0,012 to 1,70 P 0,011 to 1,60 IS 0,44 to 9,40 Ti 0,018 to 0,17 Normative references references, only the edition cited applies. For undated references, the latest edition of the referenced document (in