Phen—NH_4F体系测定植物样品中Fe(Ⅲ)、Fe(Ⅱ)的研究  

Studies on determination of Fe(Ⅲ), Fe(Ⅱ)in plant sample with Phen-NH_4F system

作　　者：任晓明[1] 王学增 

机构地区：[1]信阳教育学院,河南信阳464000 [2]信阳农专,河南信阳464000

出　　处：《河南城建高等专科学校学报》2000年第4期42-45,61,共5页Journal of Henan Urban Construction Junior College

摘　　要：建立的以Phen—NH4F体系准确测定植物性样品中铁价态的新方法 ,有效地阻止了在拧檬酸等植物性样品中的有机酸存在下的由Fe3 +-Phen络合物向Fe3 +-Phen还原的散射光还原反应的发生 ,同时高倍量的Ca2 +、Mg2 +、Pb2 +、Mn2 +、Zn2 +等离子的存在对测定结果无干扰。该方法的回收率在 99.5%～ 10A new way based on Phen—NH 4F system, by which iron valence state in plant sample can be determined accurately ,can prevent effectively the dispersing light reduction reaction from Fe 3+ -Phen to Fe 3+ -Phen in the state of the existence of organic acid in plant sample such as citrin .Besides, the existernce of multipower ions such as Ca 2+ ,Mg 2+ ,Pb 2+ ,Mn 2+ ,Zn 2+ doesn't affect the measured result .The recovery ratio by this method is between 99.5%～106%.

关 键 词：Phen-NH4F体系 植物样品 铁价态 

分 类 号：O653[理学—分析化学]