BS 6870-3:1989

This standard BS 6870-3:1989 Analysis of aluminium ores is classified in these ICS categories:

• 73.060.40 Aluminium ores

This Part of BS 6870 describes a method for the analysis of aluminium ores using wavelength dispersive X-ray fluorescence.

It is applicable to materials containing not more than 40 % of iron (III) oxide (Fe₂O₃) on the ignited basis. The ranges of content of constituents covered by this standard are given in Table 1.

Table 1 – Ranges of content on the ignited basis

Oxide	Range
	% (m/m)
Silicon dioxide (SiO2)	0.5 to 30
Aluminium oxide (Al2O3)	20 to 100
Iron (III) oxide (Fe2O3)	0.05 to 40
Titanium oxide (TiO2)	0.05 to 8
Calcium oxide (CaO)	0.05 to 2
Magnesium oxide (MgO)	0.05 to 2
Phosphorus pentoxide (P2O5)	0.05 to 5
Gallium oxide (Ga2O3)	0.005 to 0.2
NOTE Other elements may be added as necessary, and in particular tungsten oxide (WO3) [0.02 % to 5 % (m/m)] where a material containing tungsten carbide is used for sample preparation.

NOTE The titles of the publications referred to in this standard are listed on the inside back cover.

Method using fused cast bead technique. General requirements for instrumentation and full details of calibration and determination of correction factors.