BS ISO 4691:2009

Foreword
1 Scope
2 Normative references
3 Principle
4 Reagents
5 Apparatus
6 Sampling and samples
  6.1 Laboratory samples
  6.2 Preparation of predried test samples
7 Procedure
  7.1 Number of determinations
  7.2 Blank test and check test
  7.3 Test portion
  7.4 Determination
      7.4.1 Decomposition of the test portion
      7.4.2 Spectrophotometric determination
      7.4.3 Preparation of calibration graph
8 Expression of results
  8.1 Calculation of mass fraction of titanium
  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 factor
9 Test report
Annex A (normative) - Flowsheet of the procedure for the
        acceptance of analytical values for test samples
Annex B (informative) - Derivation of repeatability and
        permissible tolerance equations
Annex C (informative) - Precision data obtained by
        international analytical trials

Describes a spectrophotometric method using diantipyrylmethane for the determination of the mass fraction of titanium in iron ores.

This International Standard specifies a spectrophotometric method using diantipyrylmethane for the determination of the mass fraction of titanium in iron ores.

This method is applicable to a mass-fraction range of 0,02%to 4,0%of titanium in natural iron ores, and iron ore concentrates and agglomerates including sinter products.