水溶性高聚物萃取分离光度法测定Ca^(2+)的研究  

Determination of Ca^(2+) with water-soluble polymer extraction by spectrophotometry

作　　者：杜建中[1] 丁玉蓉[1] 

机构地区：[1]湛江师范学院化学系,湛江524048

出　　处：《分析试验室》2005年第1期73-76,共4页Chinese Journal of Analysis Laboratory

基　　金：湛江师范学院重点科研项目资助(Z0220)

摘　　要：利用在无机盐存在下,水溶性高聚物可分为两相的特点,研究了在聚乙二醇-邻苯二酚紫-邻二氮菲-硫酸铵体系中,Ca2+、Al3+、Co2+、Cu2+、Fe3+、Ni2+、Pb2+、Zn2+混合溶液中Ca2+的分离及测定条件,实现了Ca2+与Al3+、Co2+、Cu2+、Fe3+、Ni2+、Pb2+、Zn2+的定量分离和测定。Ca2+质量浓度在0 05～1 0μg/mL范围内具有良好的线性关系,回收率92%～105%。A extraction-spectrophotometric method for the determination of Ca^(2+) in water-soluble polymer was studied, based on the water-soluble polymer solution separated two phases in the presence of inorganic salts. The separation and determination conditions of Ca^(2+) in polyglycol-pyrocatechol violet-o-phenanthroline and ammonium sulfate system were investigated. The results show that Ca^(2+) can be quantitatively separated from the system of Ca^(2+), Al^(3+), Co^(2+), Cu^(2+), Fe^(3+), Ni^(2+), Pb^(2+), Zn^(2+). The linear range for the determination of Ca^(2+) is 0.05～1.0 μg/mL. The recovery was 92%～105%.

关 键 词：钙 分离 高聚物 回收率 

分 类 号：O658.2[理学—分析化学]