95.99 Withdrawal of Standard Aug 20, 2007
ISO
ISO/TC 102/SC 2 Chemical analysis
International Standard
73.060.10 Iron ores
The method is based on decomposition of the test portion by hydrochloric acid/nitric acid, evaporation, ignition of the residue and removal of silica, fusion with sodium carbonate and dissolution of the cooled melt in the filtrate, aspiration of the solution into the flame of an atomic absorption spectrometer, and comparison of the absorbance values obtained for calcium with those obtained from the calibration solutions. Applies to calcium contents between 0,01 % and 10,0 % in natural iron ores, iron ore concentrates and agglomerates, including sinter products.
WITHDRAWN
ISO 4692:1980
WITHDRAWN
ISO 10203:1992
95.99
Withdrawal of Standard
Aug 20, 2007
WITHDRAWN
ISO 10203:2006