BS ISO 2597-1:2006

Foreword
Introduction
1 Scope
2 Normative references
3 Principle
4 Reagents
5 Apparatus
6 Sampling and samples
  6.1 Laboratory sample
  6.2 Preparation of test samples
      6.2.1 Ores having significant contents of combined
            water or oxidizable compounds
      6.2.2 Ores outside the scope of 6.2.1
7 Procedure
  7.1 Number of determinations
  7.2 Test portion
  7.3 Determination of hygroscopic moisture content
  7.4 Blank test and check test
  7.5 Determination
      7.5.1 Decomposition of the test portion
      7.5.2 Reduction
      7.5.3 Titration
      7.5.4 Blank test
8 Expression of results
  8.1 Calculation of total iron content
  8.2 General treatment of results
      8.2.1 Repeatability and permissible tolerance
      8.2.2 Determination of analytical result
      8.2.3 Between-laboratories precision
      8.2.4 Check for trueness
      8.2.5 Calculation of final result
  8.3 Oxide factors in percent
9 Test report
Annex A (normative) Flowsheet for the procedure for the
                      acceptance of analytical values for
                      test samples
Annex B (informative) Derivation of precision statements
Annex C (informative) Decontamination of the waste solutions
                      from the analysis

Describes a titrimetric method for the determination of the total iron content of iron ores, using potassium dichromate after reduction of the trivalent iron by tin(II) chloride.

This part of ISO2597 specifies a titrimetric method for the determination of the total iron content of iron ores, using potassium dichromate after reduction of the trivalent iron by tin(II) chloride.

The method is applicable to total iron contents between 30%(mass fraction) and 72%(mass fraction) in natural iron ores, iron ore concentrates and agglomerates, including sinter products.

NOTE An equivalent International Standard that does not use mercury(II) chloride is ISO9507:1990, Iron ores— Determination of total iron content— Titanium(III) chloride reduction methods.

A suggested procedure for removal of mercury from the waste solutions before discharge to effluent drains is given in AnnexC.