4,5-二溴苯基荧光酮光度法测定微量钯  

Determination of Trace Palladium by Spectrophotometric Method with 4,5-Dibromophenylfluorone

作　　者：陈文宾[1] 徐国想[1] 张娟[1] 周洪英[1] 

机构地区：[1]淮海工学院化学工程系,江苏连云港222005

出　　处：《分析测试技术与仪器》2004年第3期165-168,共4页Analysis and Testing Technology and Instruments

基　　金：淮海工学院教学改革研究项目(2003年).

摘　　要：研究了在十二烷基磺酸钠存在下,Pd(Ⅱ)与4,5 二溴苯基荧光酮的显色反应.试验表明,在pH6 3醋酸 醋酸钠缓冲溶液中,Pd(Ⅱ)与试剂形成1∶4的暗黄色配合物,配合物的最大吸收峰位于376nm波长处,表观摩尔吸光系数ε为1 06×105L/(mol·cm).Pd(Ⅱ)含量在0～12μg/10mL范围内符合比尔定律.所拟方法用于钯催化剂和钯矿样中微量钯的测定,结果满意.The color reaction of the reagent DBPF with Pd(II) in the presence of SLS was studied. Results show that the new color reagent reacts with Pd(II) to form a stable yellow complex(1︰4)in the presence of SLS at pH 6.3 of HAc-NaAc buffer. The maximum absorption wavelength and apparent molar absorptivity are 376 nm and 1.06×10^(5 ) L/(mol·cm) respectively. Beer′s law is obeyed in the range of 0～12 μg/10 mL Pd(II). The method has been applied to the determination of trace palladium (II) in palladium catalyst and mineral samples with satisfactory results.

关 键 词：4 5-二溴苯基荧光酮 分光光度法 钯 

分 类 号：O657.32[理学—分析化学]