ISO 4691:1985

Iron ores — Determination of titanium content — Diantipyrylmethane spectrophotometric method

The method ist applicable to a concentration range of 0,01 to 6,0 % (m/m) of titanium in natural iron ores, and iron ore concentrates and agglomerates including sinter products. Specifies principle, reagents, apparatus, sampling and samples, procedure, expression of results, and test report. ISO 4691 includes three annexes.