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). Wet chemical analysis Refractories, Refractory materials, Aluminium oxide, Zirconium dioxide, Silicon dioxide, Chemical analysis & testing, Determination of content, Oxides, Volumetric analysis, Spectrophotometry