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).
出处
《石油化工》
CAS
CSCD
北大核心
1992年第10期695-700,共6页
Petrochemical Technology
基金
国家自然科学基金
