在溴化十六烷基三甲胺存在下钯与对羟基苯基荧光酮显色反应的研究  

Spectrophotometric Determination of Microamount of Pd(Ⅱ) with P-HPF and CTMAB

作　　者：赵力[1] 胡守坤[2] 

机构地区：[1]成都中医学院药学系 [2]四川大学化学系,成都610064

出　　处：《石油化工》1992年第10期695-700,共6页Petrochemical Technology

基　　金：国家自然科学基金

摘　　要：研究了在澳化十六烷基三甲胺(CTMAB)存在下,对羟基苯基荧光酮(P-HPF)与钯(Pd(Ⅱ))的显色条件。Pd(Ⅱ)在pH=5.5—8.0的磷酸盐介质中与P-HPF形成蓝紫色配合物,最大吸收波长λ_(mex)为581nm,摩尔吸光系数达到1.16×10~5L·mol^(-1)·cm^(-1)·Pd(Ⅱ)与P-HPF形成配合物的摩尔比为1:1。含钯量在0—7.0μg/10ml范围内服从比尔定律。初步探讨了表面活性剂的作用机理。该方法已用于活性炭及三氧化二铝为载体的钯催化剂中钯的测定,结果令人满意。A highly sensitive method for the spectrophotometric determination of microamount of palladium with p-hydroxyphenylfluorone has been investigated. In the presence of emulsifier CTMAB, palladium reacts with P-HPF in the phosphate medium (pH=5.5—8.0)and forms a blue-purple complex. The maximum absorption of the ternary complex is at 581 nm. The ratio of Pd(Ⅱ)to P-HPF in the ternary complex is 1:l.The apparent molar absorptivity may reach 1.16x 10~5 1.mol^(-1)·cm^(-1). Beer's law is obeyed in the range of 0—7.0μg/1Oml of Pd(Ⅱ).

关 键 词：钯 羟基 苯基 荧光酮 显色反应 

分 类 号：TQ420.711[化学工程]