BS ISO 4691:2009
Current
The latest, up-to-date edition.
Iron ores. Determination of titanium. Diantipyrylmethane spectrophotometric method
31-07-2009
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.
| Committee |
W/-
|
| DevelopmentNote |
Supersedes BS 7020-12(1988) & 08/30177243 DC. (07/2009)
|
| DocumentType |
Standard
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
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.
| Standards | Relationship |
| ISO 4691:2009 | Identical |
| ISO 3082:2017 | Iron ores — Sampling and sample preparation procedures |
| ISO 1042:1998 | Laboratory glassware — One-mark volumetric flasks |
| ISO 648:2008 | Laboratory glassware — Single-volume pipettes |
| ISO 7764:2006 | Iron ores Preparation of predried test samples for chemical analysis |
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