萃取动力学光度法测定活化剂铝——铝Ⅲ-过氧化氢-铜Ⅱ-邻氨基酚/氯仿体系  

Extraction-Kinetic Spectrophotometric Determination of Activator Aluminum with AlⅢ-H_2O_2-CuⅡ-o-Aminophenol/CHCl_3 System

作　　者：朱庆仁[1] 孙登明[1] 黄细仙 朱琼芬[1] 

机构地区：[1]淮北煤炭师范学院化学系,淮北235000

出　　处：《分析化学》2002年第6期739-741,共3页Chinese Journal of Analytical Chemistry

基　　金：安徽省高等学校自然科学基金资助课题 (99JL0 180 ;2 0 0 1KJ196)

摘　　要：研究了在pH 5 .5的弱酸性介质中 ,利用Al 对Cu 催化H2 O2 氧化邻氨基酚显色的指示反应的活化作用。用萃取平衡控制反应时间、水相中邻氨基酚的浓度和反应进行的程度。通过在 4 2 4nm下测量有机相的吸光度 ,建立了萃取催化光度法测定活化剂铝的新方法。方法的线性范围为 0 .0 0 4～ 0 .2 5mg/L ,检出限为1.6× 10 -6g/L。用于水样和茶叶中铝含量的测定 。An extraction kinetic spectrophotometric method for the determination of activator aluminum was studied. The method is based on the activation of aluminum? on the copper? catalyzing the oxidation of o aminophenol by hydrogen peroxide in weak acidic medium. The reaction time, concentration of o aminophenol in aqueous phase and degree of reaction are controlled by extraction equilibrium. The linear range of the method is 0.0040～0.25 mg/L. The detection limit was 1.6×10 -6 g/L.The method has been applied to the determination of aluminum in water and tea with satisfactory results.

关 键 词：测定 过氧化氢 铜(Ⅱ) 氯仿 萃取 动力学光度法 活化剂 铝 邻氨基酚 水样 茶叶 

分 类 号：O657.3[理学—分析化学]