摘要
本文采用氢氧化钠分解试样并加硫酸处理 ,使Al3+与EDTA生成配合物 ,以二甲酚橙作指示剂 ,用锌标准溶液滴定过量的EDTA ,从而计算出铝的含量。此方法用于冰晶石及氟化铝中铝的测定简单、快速、准确 ,加标回收率分别为 98～ 10 3%和 98～ 10 1% ,相对标准偏差 (RSD)分别为 0 .6 1%和 0 .41%(n =11)
Decomposition of sample by NaOH and H 2SO 4 treatment, Al +3 and EDTA form a complex, using xylene orange as a indicator, titration of excess amount EDTA by zinc standard solution, the content of aluminium can be calculated. Simple, quick and accurate determination of aluminium in the cryolite and aluminium fluoride was achieved by this method. The recoveries after addition of standard are 98～103%and 98～101%respectively. The relative standard deviation are 0.61% and 0.41%(n=11)respectively.
出处
《四川有色金属》
2001年第1期51-54,共4页
Sichuan Nonferrous Metals
