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4,5-二溴苯基萤光酮(DBPF),在表面活性剂存在下,是近几年来应用甚为广泛的高灵敏显色剂,已用于很多高价金属离子的测定.但利用贵金属与DBPF在表面活性剂存在下的络合体系却未见有报道。因此,本文系统地研究了在溴化十六烷基三甲铵(CTMAB)存在下,DBPF和钯的显色反应和光学特性,试验和拟定了该体系测定微量钯的条件和方法。共存离子的干扰和消除,并测定了络合物的组成。方法灵敏度高,使用适当掩蔽剂时,有相当好的选择性。用此法分析了三氧化二铝为载体及活性炭为载体的钯催化剂中钯的含量,同ICP-AES发射光谱,原子吸收法所得结果对照,得到了满意的结果。
In the presence of surfactants, DBPF, a widely used highly sensitive developer in recent years, has been used for the determination of many expensive metal ions. However, the use of precious metal However, no complexing system with DBPF in the presence of surfactants has been reported. Therefore, the color reaction and optical properties of DBPF and palladium in the presence of cetyltrimethylammonium bromide (CTMAB) have been studied systematically. The conditions and methods for the determination of trace palladium with this system have been studied and prepared. Coexistence of interference and elimination of ions, and the determination of the composition of the complex. The method is highly sensitive and has good selectivity when used with appropriate masking agents. The content of palladium in the palladium catalyst supported on aluminum oxide as support and activated carbon was analyzed by this method, and the results were compared with those obtained by ICP-AES and atomic absorption spectrometry. The results were satisfactory.