【摘要】 研究了铝钙包芯线中铝的测定方法。用氢氧化钠溶液溶解样品的同时将铁与铝分离,加入过量的EDTA与铝络合,以PAN为指示剂,用硫酸铜标准溶液间接滴定法测定铝。试样中大量钙和微量硅对测定没有干扰,铁经氢氧化钠沉淀分离后也不影响测定。方法可用于测定铝钙包芯线中铝含量,结果令人满意。更多还原

【Abstract】 An analytical method of determining aluminium in ladle aluminium-calcium packed wire feeding has been studied.The sample is dissolved in sodium hydroxide Solution and at the same time i- ron as iron hydroxide is separated from aluminium.Then excessive EDTA is added into the solution to complex aluminium.Using PAN as indicator and CuSO₄ as indirect titrant the aluminium content is de- termined.Larger quantities of calcium and micro amounts of silcon did not interfere in the determina- tion of aluminium.Interference from iron was avoided by precipitation with sodium hydroxide.The method may be applied satisfactorily to the determination of aluminium in ladle aluminium-calcium packed wire feeding.更多还原