节点文献
铁-抗坏血酸-3,3′,5,5′-四溴联苯-双-(重氮氨基偶氮苯)催化褪色光度法测定痕量铁
Catalytic Kinetic Spectrophotometric Determination of Trace Iron Using Iron-Ascorbic acid-3,3′,5, 5′-Tetrabromodiphenyl-bis-diazoaminoazobenzene System
【摘要】 研究了在硫酸介质中 ,铁 催化抗坏血酸还原 3 ,3′,5 ,5′ 四溴联苯 双 (重氮氨基偶氮苯 )(TBDPBDAA)而褪色的反应及其动力学条件 ,测定了反应级数和表观活化能 ,建立了催化动力学光度法测定痕量铁的新方法。方法的测定范围为 0~ 0 .0 80mg L;测定下限为 4.3× 1 0 - 1 0 g mL。用于测定发样、茶叶、面粉中的痕量铁 ,与电感耦合等离子体原子发射光谱法 (ICP AES)对照 ,结果满意。
【Abstract】 Decolourization of 3,3′,5,5′-tetrabromodiphenyl-bis-diazoaminoazobenzene by reduction of ascorbic acid in sulfuric acid medium using iron ? as catalyst was investigated. A method of the catalytic kinetic spectrophotometry for the determination of iron ? was established. The linear range of the method is 0~0.08 μg/L and determination limit of 4.3×10 -10 g/mL. This method has been applied to the determination of trace iron ? in hair, tea and flour with satisfactory results.
【关键词】 催化动力学光度法;
铁Ⅲ;
抗坏血酸;
3,3′,5,5′-四溴联苯-双-(重氮氨基偶氮苯);
【Key words】 Catalytic kinetic spectrophotometry; iron ?; ascorbic acid; 3; 3′; 5; 5′-tetrabromodiphenyl-bis-diazoaminoazobenzene;
【Key words】 Catalytic kinetic spectrophotometry; iron ?; ascorbic acid; 3; 3′; 5; 5′-tetrabromodiphenyl-bis-diazoaminoazobenzene;
- 【文献出处】 分析化学 ,Chinese Journal of Analytical Chemistry , 编辑部邮箱 ,2003年12期
- 【分类号】O657.3
- 【被引频次】9
- 【下载频次】131