Oleinikova M, Muraviev D, Valiente M
Departament de Química, Unitat de Química Analítica, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Barcelona, Spain.
Anal Chem. 1999 Nov 1;71(21):4866-73. doi: 10.1021/ac9902345.
This paper dedicated to the further development of the novel aqua-impregnated-resin (AIR) technique reports the results obtained by studying the column separation of equimolar mixtures of Cu(2+), Al(3+), and Zn(2+) on iminodiacetic (IDA) and polyacrylic (PAR) resins by using 0.2 M heptane solutions of either bis(2-ethylhexyl) phosphoric acid (DEHPA) or bis(2-ethyhexyl) dithiophosphoric acid (DEHDTPA) as selective eluents for extractive desorption of metal ions from the resin phase. The quantitative separation of Cu(2+)-Al(3+) mixtures has been achieved by sequential elution of metals from PAR with DEHDTPA and H(2)SO(4) solutions. Purification of Cu(2+) from Al(3+) and/or Zn(2+) and Al(3+) from Cu(2+) and Zn(2+) is achieved by extractive elution of metal mixtures from IDAR or PAR with DEHPA or DEHDTPA solutions, respectively, followed by stripping of the purified metals with 1.1 M H(2)SO(4). The resulting purity of metals obtained with the yield of >96% exceed 95%.
本文致力于新型水浸渍树脂（AIR）技术的进一步发展，报告了通过使用双（2-乙基己基）磷酸（DEHPA）或双（2-乙基己基）二硫代磷酸（DEHDTPA）的0.2 M庚烷溶液作为选择性洗脱剂，从树脂相中萃取解吸金属离子，研究Cu(2+)、Al(3+)和Zn(2+)等摩尔混合物在亚氨基二乙酸（IDA）和聚丙烯酸（PAR）树脂上的柱分离所获得的结果。通过用DEHDTPA和H₂SO₄溶液依次从PAR中洗脱金属，实现了Cu(2+)-Al(3+)混合物的定量分离。分别用DEHPA或DEHDTPA溶液从IDAR或PAR中萃取洗脱金属混合物，然后用1.1 M H₂SO₄洗脱纯化的金属，从而实现从Al(3+)和/或Zn(2+)中纯化Cu(2+)以及从Cu(2+)和Zn(2+)中纯化Al(3+)。所得金属的纯度超过95%，产率>96%。
