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矿石中微量稀土总量的分离测定一般采用离子交换法、纸上色层法、反相萃取色层法、溶剂萃取法,沉淀分离法、缓冲掩蔽法等但以溶剂萃取法较为简便快速。其中尤以PMBP—苯应用最为广泛,由于苯是有害物质,故本文研究PMBP—醋酸丁酯萃取分离微量稀土总量的体系,并对萃取分离条件,偶氮胂Ⅲ显色条件,氢氧化物共沉淀分离条件进行了探讨,制定了铝土矿中微量稀土总量的测定方法。本法测定范围RE_2O_30.02～0.2％。
Determination of trace rare earth total amount of ore generally used ion exchange method, paper chromatography, reversed-phase extraction chromatography, solvent extraction, precipitation separation, buffer masking, but the solvent extraction method is relatively simple and fast. Among them, PMBP-benzene is the most widely used one. Because benzene is a harmful substance, this paper studied the system of PMBP-butyl acetate extraction and separation of trace rare earths, and studied the extraction and separation conditions, the arsenazo Ⅲ color condition, Coprecipitation separation conditions were discussed, developed a trace amount of trace rare earths in bauxite. The scope of this method RE_2O_30.02 ~ 0.2%.