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关于铌和钽的纸层析分离已有不少报导,但反相纸层析分离铌和钽似尚未见。作者曾以磷酸三丁酯(TBP)为固定相,用反相纸层析研究钛、锆、钍、钒、钼、钨、贵金属、硒、碲等,均获良好结果。本文研究用反相纸层析分离铌和钽的可能性。实验结果表明:以TBP和20％的单宁为固定相,用适当比例的NH_4SCN、H_2C_2O_4和HCI为流动相,可使铌和钽获良好分离。实验方法是:用国产“新华”牌滤纸裁成1.3×20厘米的纸条,以TBP:C_6H_6=20:80(V/V)按前文处理后,再于纸条原点附近(约3—4厘米)浸以20％单宁水溶液,用滤纸吸去表面水分或阴干(但时间不得超过5小时),然后放上铌和钽的草酸盐试液,趁斑点润湿即移入层析筒中层析。层析至
There have been many reports on the paper chromatography separation of niobium and tantalum, but the reverse phase paper chromatography has not seen the separation of niobium and tantalum. The authors have used TBP as the stationary phase, with reverse phase paper chromatography study of titanium, zirconium, thorium, vanadium, molybdenum, tungsten, precious metals, selenium, tellurium, etc., were good results. This article investigates the possibility of separating niobium and tantalum using reverse phase paper chromatography. The experimental results show that the separation of niobium and tantalum can be achieved with TBP and 20% tannin as the stationary phase and NH 4 SCN, H 2 C 2 O 4 and HCl as the mobile phase. The experimental method is as follows: Cut the 1.3 × 20 cm strips with domestic “Xinhua” brand filter paper and dispose them at the original position of TBP: C_6H_6 = 20: 80 (V / V) Cm) was soaked in 20% aqueous tannin solution, the surface of the filter paper to absorb moisture or dry (but not more than 5 hours), and then put the oxalic acid solution of niobium and tantalum test solution, while spotting wet into the middle of the cartridge Analysis. Chromatography to