Separation of cobalt(II) from nickel(II) by solid-phase extraction into Aliquat 336 chloride immobilized in poly(vinyl chloride)

Solid-Phase Extraction of Cobalt(II) from Lithium Chloride Solutions Using a Poly(vinyl chloride)-based Polymer Inclusion Membrane with Aliquat 336 as the Carrier

“…PIMs were prepared according to Blitz-Raith et al 25 Aliquat 336 (320 mg) was dissolved in THF (10 mL) in a beaker, and then PVC (480 mg) was dissolved in the solution. The solution was poured into a glass ring (inner diameter of 75 mm) on a flat glass plate.…”

“…In studies concerning the separation of cobalt(II) from nickel(II), 75 mL solutions containing 25 mg L -1 of both cobalt(II) and nickel(II) and 7 mol L -1 of lithium chloride, or 8 mol L -1 of lithium chloride and 1 mol L -1 of hydrochloric acid, were used. In PIM studies on the back extraction of cobalt(II), PIMs containing extracted cobalt(II) were immersed in 75 mL of deionized water, 25 and the solutions were stirred vigorously. The cobalt(II) concentration in the aqueous phase was monitored by FAAS.…”

“…25 Therefore, the extraction of cobalt(II) and nickel(II) was attempted using a solution containing 7 mol L -1 lithium chloride or 8 mol L -1 lithium chloride and 1 mol L -1 hydrochloric acid. As a result, hydrochloric acid.…”

“…15 Solid-phase extraction using PIMs has been proposed for separating various metal ions, such as chromium(VI), 16,17 copper(II), [18][19][20] cadmium(II), [18][19][20] palladium(II) 21 and gold(III). [22][23][24] A PVC-based PIM with Aliquat 336 as the carrier has been found to effectively extract cobalt(II) from 7 mol L -1 hydrochloric acid solutions 25 by the same mechanism as in liquid-liquid extraction. 5 However, the use of hydrochloric acid at high concentrations is not desirable because of its corrosiveness.…”

Cold-Induced Aggregation Microextraction: A Novel Sample Preparation Technique Based on Ionic Liquids for Preconcentration of Cobalt Prior to Its Determination by Fiber Optic-Linear Array Detection Spectrophotometry in Real Water Samples

“…Also in the presence of more than 3 % of water-miscible organic solvents such as acetone phase separation does not occur. Several SPE preconcentration procedures for cobalt have been reported using various sorbents (Blitz-Raith et al, 2007;Ghaedi et al, 2007;Praveen et al, 2005;Yang et al, 2002). DLLME is a type of solvent microextraction (SME), which has been developed in 2007.…”