主题：【已应助】求助英文文献5篇 谢谢大家（还差2篇 继续求助）

【序号】：1
【作者】：Yasuaki Okamoto
【题名】：High preconcentration of ultra-trace metal ions by liquid–liquid extraction using water/oil/water emulsions as liquid surfactant membranes
【期刊】：Microchemical Journal 
【全文链接】：http://www.sciencedirect.com/science/article/pii/S0026265X00001612
【序号】：2
【作者】：T.P. Martin
【题名】：The extraction of copper from dilute aqueous solutions using a liquid membrane process
【期刊】： Hydrometallurgy 
【全文链接】：http://www.sciencedirect.com/science/article/pii/0304386X77900408
【序号】：3
【作者】：Kim Bang Mo
【题名】：Membrane-based solvent extraction for selective removal and recovery of metals
【期刊】：Journal of Membrane Science
【全文链接】：http://www.sciencedirect.com/science/article/pii/S0376738800830604
【序号】：4
【作者】：M.Teresa A. Reis
【题名】：Modelling of zinc extraction from sulphate solutions with bis(2-ethylhexyl)thiophosphoric acid by emulsion liquid membranes
【期刊】： Journal of Membrane Science
【全文链接】：http://www.sciencedirect.com/science/article/pii/S0376738804001802
【序号】：5
【作者】：Recep Ali Kumbasar
【题名】：Selective separation of chromium (VI) from acidic solutions containing various metal ions through emulsion liquid membrane using trioctylamine as extractant
【期刊】：Separation and Purification Technology
【全文链接】：http://www.sciencedirect.com/science/article/pii/S1383586608003080