分光光度法测铈(Ⅳ)-乙醇配合物的组成  

Determination of Complex Composition of Cerium(Ⅳ)-Ethanol by Spectrophotometry

作　　者：卢金凤[1] 吴义芳[1] 郁章玉[1] 林宪杰[1] 赵楠[1] 

机构地区：[1]菏泽学院化学与化工系,山东菏泽274015

出　　处：《广州化工》2010年第7期144-144,153,共2页GuangZhou Chemical Industry

基　　金：山东省自然科学基金(ZR2009BM003);菏泽学院博士基金(200701)

摘　　要：以硝酸铈铵和浓硝酸、无水乙醇为原料,配制等摩尔浓度的硝酸铈铵溶液以及乙醇溶液,再以此为原料根据等摩尔系列法配制铈(Ⅳ)-乙醇的配合物,然后,用分光光度计测量铈(Ⅳ)-乙醇的配合物的吸光度值。以AMR对nM/(nM+nR)作图,得到一条曲线,由图读出最大吸光度处所对应的金属离子的摩尔分数,从而计算出铈(Ⅳ)-乙醇的配合物的组成为1:1。Equimolar concentration solutions of cerium ammonium nitrate and ethanol were prepared using cerium ammonium nitrate,concentrated nitric acid and pure ethanol as raw materials.Ce（Ⅳ）-ethanol complexes were prepared according to equimolar series method.The numerical values of absorbance of cerium（Ⅳ）-ethanol complex were measured by spectrophotometer.A graph was got by drawing AMR-nM/（nM＋nR） curve.The corresponding molar fraction of metal ions in the maximum absorbance can be read from AMR-nM/（nM＋nR） graph and therefore Ce（Ⅳ）-ethanol complex composition was calculated to be 1：1.

关 键 词：硝酸铈铵 铈(Ⅳ)-乙醇的配合物 吸光度 等摩尔系列法 

分 类 号：TQ223.122[化学工程—有机化工]