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独居石是重要稀土矿物之一。近年来,用薄层色谱法分离测定独居石中稀土元素已引起人们的重视,但以一次展开分离独居石中所有轻稀土元素的报导则较少。我们曾经研究过以磷酸三辛酯/四氢呋喃/乙醚/硝酸(体积比为3:18:18:2)为展开剂,在硅胶H/羧甲基纤维素(CMC)/硝酸铵(重量比为5:0.16:0.64)薄层板上分离稀土元素,结果发现,镧、铈、错、钕、钐之间能相互分离。由于磷酸三辛酯的价格比较昂贵,不宜推广,因此我们想用同类的而又比较廉价的磷酸三
Monazite is one of the important rare earth minerals. In recent years, the separation and determination of rare earth elements in monazite by thin-layer chromatography has attracted people’s attention, but there are few reports on the separation of all the light-rare earth elements in monazite at one time. We have studied the use of trioctyl phosphate / tetrahydrofuran / ether / nitric acid (volume ratio of 3: 18: 18: 2) as a developing agent in the H / carboxymethyl cellulose (CMC) / ammonium nitrate 5: 0.16: 0.64). The results showed that lanthanum, cerium, maltose, neodymium and samarium could be separated from each other. As the price of trioctyl phosphate is more expensive and should not be promoted, we would like to use the same kind of relatively cheap tris