This International Standard deals with the chemical analysis of abrasive grains or crude based on fused aluminium oxide. lt applies to commercially available products but not necessarily to products which have been altered by use. lt includes the following determinations: -Loss on ignition -Silicon dioxide -lron oxide -Titanium dioxide -Calcium oxide -Magnesium oxide -Zirconium oxide -Aluminium oxide -Analysis by atomic absorption spectrometry -Potassium oxide and sodium oxide (flame photometric method) -Analysis by X-ray fluorescence spectroscopy -Carbon and sulfur (solid infrared absorption method)