Valfredo Azevedo Lemos et al.
Journal of hazardous materials, 159(2-3), 245-251 (2008-03-21)
A new, simple and versatile cloud-point extraction (CPE) methodology has been developed for the separation and preconcentration of copper and nickel. The metals in the initial aqueous solution were complexed with 2-(2'-benzothiazolylazo)-5-(N,N-diethyl)aminophenol (BDAP) and Triton X-114 was added as surfactant.