微波消解-萃取光度法测定高纯氧化铝中SiO_2的含量

Determination of SiO_2 in high-purity alumina by extractive spectrophotometry combined with microwave digestion

采用微波消解溶样，用正戊醇萃取硅钼蓝萃取光度法测定高纯氧化铝中SiO2的含量．该方法选择性好，灵敏度高，硅回收率为96．0％～106％，适用于高纯氧化铝中SiO2含量为0．0005％～0．010％的测定．

The pentanol extraction and spectrophtometry were developed for the determination of trance SiO2 in high-purity alumina in this paper. Samples were digested in microwave furnace. The method demonstrates well selectivity and sensitivity, which can be used in the determination of 0. 0005%-0. 010% of SiO2 in high-purity alumina.