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本文拟定的锂的反相萃取柱色层分离法,以聚四氟乙烯(701)为载体,0.186M二苯甲酰甲烷(DBM)-12.5％磷酸三丁酯(TBP)的16.7％十二烷-70.8％乙醚溶液为固定相,2M NH_3·H_2O及水为杂质淋洗液,1％NaCl作锂的解脱液,可使锂与铜、镍、钴、钙、镁、铝、铋、铷、铯、镉、锰、钒、铌、钽等元素定量分离,最后用钍试剂Ⅰ分光光法测定锂(也可用原子吸收光谱法测定)。此法不仅分离效率高、回收率高(可达100％),而且简便、快速、易于普及,能用于盐卤及矿石等试样中锂的测定,也可用于锂的提制(仅需将锂与钠进一步分离)。
In this paper, the reversed-phase extractive column chromatography of lithium with polytetrafluoroethylene (701) as the carrier, 16.7% of 0.186 M dibenzoylmethane (DBM) -12.5% TBP Alkane-70.8% ether solution as stationary phase, 2M NH_3 · H_2O and water as impurity eluent, 1% NaCl as lithium solution, can make lithium and copper, nickel, cobalt, calcium, magnesium, aluminum, bismuth, rubidium , Cesium, cadmium, manganese, vanadium, niobium, tantalum and other elements quantitative separation, and finally thorium reagent Ⅰ spectrophotometric determination of lithium (also available atomic absorption spectrometry). The method not only has the advantages of high separation efficiency and high recovery rate (up to 100%), but also is simple, rapid and easy to popularize. It can be used for the determination of lithium in samples such as bittern and ore and also for the extraction of lithium Lithium and sodium further separation).