Chemical analysis of refractories containing alumina, zirconia & silica. Refractories containing 5 percent to 45 percent of Zr O2 (alternative to the X-ray fluorescence method). Apparatus, reagents & dissolution Refractories, Refractory materials, Aluminium oxide, Zirconium dioxide, Silicon dioxide, Chemical analysis & testing, Determination of content, Flame atomic absorption spectrometry, Atomic emission spectrophotometry, Specimen preparation, Test equipment, Chemical reagents