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H.Specker等曾用硅烷化硅胶薄层色谱分离稀土元素,陈永熙等报道了薄层——吸光度测定法。本方法用低活性硅胶在异丙醚:四氢呋喃:磷酸三丁酯:浓硝酸=10:6:1:1(体积比)溶液中连续展开分离了轻稀土,用扫描仪进行了原位测定,从而提高了灵敏度,简化了步骤,缩短了测定时间。 本试验用光谱纯轻稀土氧化物配成10毫克/毫升的溶液,取镧、铈溶液各3毫升,镨、钕、钐溶液各1毫升,分别加1毫升水,以配制稀土标准溶液。展开剂用重蒸处理的异丙
H.Specker and other silanized silica gel thin layer chromatography rare earth elements, Chen Yongxi et al reported thin layer - absorbance determination. In the method, the light rare earth is continuously unfolded by using a low active silica gel in a solution of isopropyl ether: tetrahydrofuran: tributyl phosphate: concentrated nitric acid = 10: 6: 1: 1 (volume ratio) This increases sensitivity, simplifies the procedure and reduces measurement time. In this experiment, pure light rare earth oxide was dubbed as 10 mg / ml solution, 3 ml each of lanthanum and cerium solution and 1 ml each of praseodymium, neodymium and samarium solutions were added and 1 ml of water was added separately to prepare rare earth standard solution. Developing agent Isopropyltrimethlyzed