5'-硝基水杨基荧光酮-溴化十六烷基三甲胺-柠檬酸光度法测定锌  

Spectrophotometric determination of zinc with 5'-nitrosalicylfluorone and citric acid in the presence of cetyltrimethylammonium bromide

作　　者：汤家华[1] 王玉文[1] 张家庭[1] 朱本月 胡谢君 陈高昂 

机构地区：[1]巢湖学院化学化工与生命科学学院,安徽巢湖238008

出　　处：《应用化工》2014年第12期2307-2309,共3页Applied Chemical Industry

基　　金：国家级大学生创新创业训练计划项目(201310380021)

摘　　要：研究了5＇-硝基水杨基荧光酮（5＇-NSAF）-溴化十六烷基三甲胺（CTMAB）-柠檬酸与锌形成配合物的显色反应条件和光度性，建立了光度法测定锌的新方法。结果表明，在pH 9.5 Na2 B4 O7-NaOH的缓冲溶液中，锌与5＇-硝基水杨基荧光酮-CTMAB-柠檬酸能生成稳定的配合物，其最大波长在570 nm，锌的含量在0~0.5μg/mL范围内服从比耳定律，表观摩尔吸光系数为1.2×105 L/（mol·cm）。此方法用于葡萄糖酸锌片样品中锌的测定，回收率为101%~104%，RSD为1.5%~3.4%（N=5）。A colour reaction of zinc with 5＆#39;-nitrosalicylfluorone（5’-NSAF）-CTMAB-citric acid has been studied spectrophotometrically,and new determination method of zinc by spectrophotometry was estab-lished. The results showed that in Na2 B4 O7-NaOH buffer solution of pH 9. 5,the stationary complex of zinc with 5 ’-NSAF-CTMAB-citric acid is formed with the maximum absorption wavelength at 570 nm, Beer’s law is obeyed in the range of 0~0. 5 μg/mL for zinc,the apparent absorption efficient is 1. 2 ×105 L/（ mol·cm）,this method was used for the determination of zinc in zinc glucose,and the recovery rate is between 101% ~104%. RSDs of five determinations were 1 . 5% ~3 . 4%（ N=5 ）.

关 键 词：锌 5'-硝基水杨基荧光酮 光度法 

分 类 号：TQ281[化学工程—有机化工]