杂多酸应用于二茂铁含量测定的研究

Application of Heteropoly Acidon the Determination of Ferroence

研究了在磷钨杂多酸介质中 ,以FeCl3 为滴定剂、CH3 OH为溶剂 ,FeCl3 与二茂铁的电位滴定过程。结果表明 ,与其它酸性介质相比 ,其滴定突跃明显 ,杂多阴离子与二茂铁正离子生成稳定沉淀 ,且具有足够酸度 ,无氧化性 ,5次测定的标准偏差为 0 0 82 %。

Using heleropoly acid as a medium,CH 3OH as a solvent,potential titration of ferroence with ferricchloride was studied. The result shows that in comparison with the other acid medium the leap of thetitration is larger. The heteropoly acid reacts with ferrociniumi on to form stable deposit which has enough acidity and no oxidizability. The SD=0 082%(n=5). The method can be used to determine the product successfuly.