【摘要】 Fe³⁺、Ni²⁺及其EDTA络合物在示渡极谱图上没有切口或切口变化不明显。本文提出一种新方法,用锌作指示剂,用EDTA反滴定法测定铁镍总量;以水杨酸掩蔽铁（Ⅲ）,EDTA直接滴定镍分量,两者相减得到铁分量,终点直观,方法简便,准确,经济。更多还原

【Abstract】 Fe²⁺、Ni²⁺ and thier EDTA Complexes give no sharp incisions their dE/dt=f （E） curues, or the change of sharp incisions is not So clear. The total amount of iron and nickel was ditermined by back—titration with EDTA using zine as the indicator. The single amount of nickel was given by EDTA direct titration using salicylic acid as the agent for Fe（Ⅲ）. The total amount minus nickel amount is iron amount. The end point is perceived directly. The method is Simple, accurate and economic.更多还原