邻二氮杂菲分光光度法测定高铁酸钡  

Determination of barium ferrate(Ⅵ) by o-phenanthroline spectrophotometry

作　　者：罗志勇[1,2] 张胜涛[1,2] 王艳云[1] 郑泽根[3] 

机构地区：[1]重庆大学化学化工学院,重庆400044 [2]洁净能源与资源利用化工过程重庆市重点实验室,重庆400044 [3]重庆大学三峡库区生态环境教育部重点实验室,重庆400045

出　　处：《分析试验室》2014年第12期1382-1385,共4页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金(21376282);重庆市自然科学基金(CSTC2011BB7087)项目资助

摘　　要：基于邻二氮杂菲分光光度法建立了Ba Fe O4的定量分析方法,并探讨了Ba Fe O4测定的适宜条件。经预处理的Ba Fe O4被硝酸酸化、盐酸羟胺还原后在HAc-Na Ac缓冲溶液中与邻二氮杂菲快速显色,生成橙红色络离子[(C12H8N2)3Fe]2+,该体系在510 nm波长处有最大吸收峰。利用分光光度计测定该体系510 nm处吸光度即可换算Ba Fe O4纯度。方法可应用于定量检测其他难溶性高铁酸盐。A method for the determination of barium ferrate（ VI） was developed. It was based on ophenanthroline spectrophotometry. The optimum experimental conditions for the quantitative determination of barium ferrate（ VI） were discussed. The results show that Fe^2 ＋,which is derived from the product of acidification from nitric acid solution and reduction from hydroxylamine hydrochloride of barium ferrate（ VI）pretreated,reacts with o-phenanthroline and forms orange-red complex ion [（ C12H8N2）3Fe]^2 ＋in HAc-Na Ac buffer solution. The rate of this color reaction is fast. There is a maximum absorption peak at 510 nm for this reaction system. The purity of barium ferrate（ VI） can be calculated on the basis of the absorbance of colored complex determined by spectrophotometer at 510 nm. This method can be applied to the determination of other poorly water soluble ferrates.

关 键 词：邻二氮杂菲分光光度法 高铁酸钡 难溶性高铁酸盐 定量分析 

分 类 号：O657.33[理学—分析化学]