对氯苯基荧光酮与锌显色反应的研究及应用  

Study on Chromogenic Reaction of Zinc with p-Chlorophenylfluorone and Its Application

作　　者：杜容山[1] 黄应平[1] 罗光富[1] 李瑞萍[1] 潘家荣[1] 

机构地区：[1]三峡大学化学与生命科学学院,湖北宜昌443002

出　　处：《分析科学学报》2009年第3期321-324,共4页Journal of Analytical Science

基　　金：湖北省杰出青年人才基金(No.5ABB030);湖北省教育厅自然科学重大项目(No.2004z001)

摘　　要：在阳离子表面活性剂溴化十六烷基三甲胺（CTMAB）存在下，研究了对氯苯基荧光酮（P—CPF）与锌的显色反应条件和光度性质。在pH=8．4的Na2HPO4-KH2PO4缓冲溶液中，锌与P—CPF形成1：1的红色络合物，所形成的络合物的最大吸收波长位于568nm处，表观摩尔吸光系数为7．20×10^4L·mol^-1·cm^-1；红色络合物至少稳定10h以上，锌含量在0～2．40μg／5mL范围内符合比耳定律。拟定方法用于药物中微量锌的测定，结果满意。In the presence of cationic surfactant cetyltrimethylammonium bromide（CTMAB）, reaction conditions and photometric properties of p-chlorophenylfluorone （p-CPF） with zinc were studied. The results showed that the molar ratio of zinc and p-CPF in the red complex was 1 ： 1, the maximum absorption wavelength of p-CPF-Zn-CTMAB complex was 568 nm and the apparent molar absorptivity was 7.20× 10^4 L.mo1^-1 .cm^-1 in the buffer solution （pH 8.4 of Na2HPO4-KH2PO4 ）. The red complex was stable for 10 hours at least. Beer＇s law was obeyed when the content of zinc was in the range of 0- 2.40 μg/5mL. The developed method has been applied to the determination of trace zinc in the medicine with satisfactory results.

关 键 词：对氯苯基荧光酮 锌 分光光度法 

分 类 号：O657.3[理学—分析化学]