流动注射分析法测定铁的价态  

Determination of Iron Valency States by Flow Injection Analysis

作　　者：陈丹华[1] 蔡汝秀[1] 曾云鹗[1] 

机构地区：[1]武汉大学化学系,武汉430072

出　　处：《分析化学》1992年第1期88-90,共3页Chinese Journal of Analytical Chemistry

基　　金：国家博士点资助课题

摘　　要：本文根据Fe(Ⅲ)-DCS-偶氮胂和Fe(Ⅱ)-邻菲啰啉体系的显色反应,采用自动化流动注射分析装置进行了铁两种价态的测定,不同比例的Fe(Ⅲ)和Fe(Ⅱ)混合物相对标准偏差在5％以内,分析速度为120试样/h。DCS-arsenazo as a color reagent for the determination of Fe(Ⅲ) has been selected by comparison of eight kinds of azo type reagents, the molar absorption coefficient is 2.41×10~4.The determination of iron valency states has been performed by the automatic flow injection analyzer based on the selective color reactions of Fe(Ⅲ)-DCS-arsenazo and Fe(Ⅱ)-o-phenanthroline. The relative standard deviation is within 5％ for the various proportions of the mixture of Fe(Ⅲ) and Fe(Ⅱ)with the sample frequency of 120 samples/h

关 键 词：铁 价态 流动注射分析 自动化分析 

分 类 号：O614.811[理学—无机化学]