火焰原子吸收光谱法测定高纯氧化铝和氢氧化铝中痕量镍

FAAS DETERMINATION OF TRACES OF NICKEL IN HIGH PURITY ALUMINIUM AND ALUMINIUM HYDROXIDE

选用碳酸钾加硼酸熔融样品 ,在 p H8～ 9的微氨性溶液中 ,镍与丁二酮肟定量生成络合物 ,用三氯甲烷萃取分离基体。有机相经盐酸反萃取 ,镍返回水相 ,用原子吸收法测定。测定范围为 1× 1 0 - 4 %～ 3× 1 0 - 3%。

It is reported in this paper that trace amounts of nickel in high purity aluminium oxide or aluminium hydroxide can be determined by FAAS method, after its preconcentration by the dimethylglyoxime extraction method. As low as w (Ni) 1×10 -4 % can be determined.