论文部分内容阅读
化学光谱法目前仍然是高纯稀土分析的主要方法。因此,稀土杂质的富集分离仍然是稀土分析研究的一项重要内容。高纯稀土中稀土杂质的化学分离,大多采用以α-羟基异丁酸或其它羟基羧酸为洗提剂的离子交换色谱。由于萃取色谱法兼有溶剂萃取法的高选择性和色谱法的高效性双重优点,因而发展很快。早在六十年代末,国外就有人将二-(2-乙基己基)磷酸(以下简称D_2EHPA)为固定相的萃取色谱技术应用于高纯稀土分析。近年来,国内有人在高纯稀土分析中采用以2-乙基己基膦酸2-乙基己酯(以下简称HEH(EHP)为固定相的萃取色谱。彭春霖等对HEH(EHP)-盐酸体系中各稀土元素的分配比已作了详细报导,为稀土的
Chemical spectroscopy is still the main method of high-purity rare earth analysis. Therefore, the enrichment and separation of rare earth impurities is still an important part of RE analysis. The chemical separation of rare earth impurities in high purity rare earth, mostly using ion exchange chromatography with α-hydroxyisobutyric acid or other hydroxycarboxylic acid as the eluent. Because of the combination of extraction and extraction of both high solvent extraction and chromatographic efficiency of the dual advantages of rapid development. As early as the late 1960s, some people abroad will be two - (2-ethylhexyl) phosphate (hereinafter referred to as D_2EHPA) as the stationary phase extraction chromatography technology for high purity rare earth analysis. In recent years, some people use high-purity rare earth analysis with 2-ethylhexylphosphonic acid 2-ethylhexyl ester (hereinafter referred to as HEH (EHP) as stationary phase extraction chromatography. Peng Chunlin and other HEH (EHP) - hydrochloric acid system In the distribution of the ratio of rare earth elements have been reported in detail for the rare earth