The Rapid Determination of Aluminum oxide in Brown corundum

      The rapid determination of alumina oxide in brown corundum was carried out by EDTA complex titration with the amygdalinic 

acid hiding titanium.The t-test showed that there were no significant differences between the above method and the China 

National Standard method（GB）.It indicated that the method is accurate,reliable and fast,with simple operation and can be used 

for the rapid determination of alumina oxide in brown corundum.