4,5-二溴邻硝基苯基荧光酮吸光光度法测定微量铜的研究及应用  

Spectrophotometry Determination of Trace Copper with 4,5-Dibromo-o-Nitrophenylfluorone

作　　者：吴志明[1] 孙嘉彦[1] 袁红霞[1] 倪红飞[1] 

机构地区：[1]江苏南通职业大学化工系,江苏省南通市226007

出　　处：《光谱实验室》2002年第6期832-834,共3页Chinese Journal of Spectroscopy Laboratory

摘　　要：在 p H5 .5的 HAc- Na Ac缓冲介质中 ,在乳化剂 OP存在下 ,Cu( )与 4 ,5 -二溴邻硝基苯基荧光酮生成 1∶ 2络合物 ,λmax=5 90 nm ,ε590 =9.5× 10 4 L· mol- 1 · cm- 1 ,铜浓度在 0— 0 .4 8mg/ L范围内遵从比耳定律 ,本方法用于粮食及水中铜的测定 。In a buffer solution of HAc NaAc of pH=5 5,copper(Ⅱ) reacts with 4 5 dibromo o nitrophenylfluorone to form a 1∶2 complex.It's maximal absorption is at 590nm,and the apparent molar absorptivity is 9.5×10 4L·mol -1 ·cm -1 .Beers law is obeyed in the concentration range of 0-0.48mg/L for copper(Ⅱ).This method has been used in the determination of copper(Ⅱ) in food and water with satisfactory results.

关 键 词：测定 吸光光度法 4 5-二溴邻硝基苯基荧光酮 铜 粮食 水 微量分析 

分 类 号：O614.121[理学—无机化学] O65[理学—化学]