ICP-AES DETERMINATION OF IMPURITIES IN IMPORTED ALUMINIUM OXIDE

0.2 g of aluminium oxide was microwave-assistedly dissolved with 4 mL phosphoric acid then made up its volume to 100 mL.Phosphoric acid was precisely added in the standards for calibration.Impurities Na,Ti,Fe,Si,Ca,V and Zn in alumunium oxide were determined using inductively coupled plasma atomic emission spectrometry.Recoveries were in range of 98.6%-105.0%.The proposed method met the requirements of the inspection of imported aluminium oxide giving RSD′s (n=11) less than 1.5%.