Zn-5-溴水杨基荧光酮-酒石酸钠-CTMAB四元显色体系的研究与应用  

Study on Four component Chromogenic Reaction System of Zinc(Ⅱ)5 BrSAF tartrate CTMAB and Its Analytical Application

作　　者：马红燕[1] 拓宏桂[1] 杨文选[1] 柴红梅[1] 金丽娜 

机构地区：[1]延安大学化学与化工系,延安716000

出　　处：《分析试验室》2000年第3期5-7,共3页Chinese Journal of Analysis Laboratory

基　　金：陕西省教委专项科研基金资助课题 !( 99JK12 4 )

摘　　要：研究了在碱性介质中 ,Zn-5 -溴水杨基荧光酮 -酒石酸钠 -CTMAB体系光度法测定微量锌的新方法。四元体系的最大吸收峰在 5 6 0 nm处 ,表观摩尔吸光系数为 1.0 8× 10 5 L·mol-1·cm-1。配合物的稳定常数 K′稳 =1.6 7× 10 1 2 ,锌含量在 0～ 10μg/2 5 m L范围内符合比耳定律。In the presence of CTMAB and sodium tartrate,zinc(Ⅱ) reacts with 5 bromosalicyl fluorone(5 BrSAF) in alkaline solution to form a rose colored four component complex with absorption maximum at 560 nm,and the molar absorptivity is 1.08×10 5 L·mol -1 ·cm -1 .The molar ratio (Zn∶5 BrSAF∶CTMAB∶sodium tartrate) is 1∶2∶3∶4.Beer's law is obeyed in the concentration range for zinc(Ⅱ) of 0～10 μg/25 mL.The proposed method is sensitive and selective,and was applied to the determination of microamounts of zinc(Ⅱ) in water and medicine with satisfactory results

关 键 词：分光光度法 锌 溴水杨基荧光酮 测定 

分 类 号：O614.241[理学—无机化学] O657.3[理学—化学]