Description:Special ceramics, Ceramics, Cermets, Particulate materials, Ceramic and glass technology, Testing conditions, Aluminium oxide, Impurities, Sodium, Potassium, Iron, Silicon, Calcium, Magnesium, Oxides, Monoxides, Determination of content, Chemical analysis and testing, Quantitative analysis, Atomic absorption spectrophotometry, Emission spectrophotometry, Calibration, Accuracy, Reproducibility, Test specimens, Control samples