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- DOI: 10.1021/ac051029u
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Electrochemically modulated liquid-liquid extraction of ions
Berduque, Alfonso; Sherburn, Amanda; Ghita, Mihaela; Dryfe, Robert A; Arrigan, Damien W
Anal. Chem. FIELD Full Journal Title:Analytical Chemistry. 2005;77(22):7310-7318.
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Full-text held externally
- DOI: 10.1021/ac051029u
Abstract
The development of ion extn. methods under electrochem. control via electrochem. at the interface between two immiscible electrolyte solns. is discussed. A hydrodynamic flow injection system was used for the potentiostatic extn. of nonredox-active species from a flowing aq. phase into a stationary organogel phase. The ions tetraethylammonium, 4-octylbenzenesulfonate (4-OBSA-), and p-toluenesulfonate (p-TSA-) were studied as model analytes. The extn. study comprised examn. of the influence of extn. potentials, aq.-phase flow rate, and target species concn. The extn. process can be monitored in situ by the ion-transfer current, which has opposing signs for anions and cations. Hydrodynamic voltammograms were obtained from these expts. The selective extn. of 4-OBSA-, from its mixt. with p-TSA-, as well as coextn. of both anions is shown. The results demonstrate the utility of electrochem. modulation for the controlled extn. of ions from an aq. phase into an organogel electrolyte phase. This offers potential benefits for various anal. processes including sample prepn. and cleanup. [on SciFinder (R)]
Keyword(s)
Anions; Cations (analytes; Extraction (potentiostatic; Flow injection systems (hydrodynamic; Voltammetry (flow; ion extn. methods under electrochem. control via electrochem. at interface between two immiscible electrolyte solns.) ; ion extn. methods under electrochem. control via electrochem. at interface between two immiscible electrolyte solns.) ; ion extn. methods under electrochem. control via electrochem. at interface between two immiscible electrolyte solns.) ; ion extn. methods under electrochem. control via electrochem. at interface between two immiscible electrolyte solns.) ; ionic analyte electrochem modulated liq extn immiscible electrolyte soln
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- CAN 143:487977 80-4 Organic Analytical Chemistry Journal 0003-2700 written in English. 7440-22-4 (Silver); 7783-90-6 (Silver chloride (AgCl); 10294-26-5 (Silver sulfate) Role: ARU (Analytical role, unclassified), DEV (Device component use), ANST (Analytical study), USES (Uses) (Ag/AgCl and Ag/Ag2SO4 ref. and pseudo-ref. electrode; ion extn. methods under electrochem. control via electrochem. at interface between two immiscible electrolyte solns.); 66-40-0 (Tetraethylammonium); 16722-51-3 (p-Toluenesulfonate); 69152-49-4 Role: ANT (Analyte), ANST (Analytical study) (analyte; ion extn. methods under electrochem. control via electrochem. at interface between two immiscible electrolyte solns.); 7447-41-8 (Lithium chloride); 10377-48-7 (Lithium sulfate) Role: ARU (Analytical role, unclassified), NUU (Other use, unclassified), ANST (Analytical study), USES (Uses) (aq. phase contg.; ion extn. methods under electrochem. control via electrochem. at interface between two immiscible electrolyte solns.); 143-66-8 (Sodium tetraphenylborate); 14680-77-4 (Potassium tetrakis(4-chlorophenylborate); 21050-13-5 Role: ARU (Analytical role, unclassified), RCT (Reactant), ANST (Analytical study), RACT (Reactant or reagent) (ion extn. methods under electrochem. control via electrochem. at interface between two immiscible electrolyte solns.); 98-95-3 (Nitrobenzene); 107-06-2 (1,2-Dichloroethane); 9002-86-2 (Poly(vinyl chloride); 21329-00-0; 154793-62-1 Role: ARU (Analytical role, unclassified), NUU (Other use, unclassified), ANST (Analytical study), USES (Uses) (organogel stationary phase contg.; ion extn. methods under electrochem. control via electrochem. at interface between two immiscible electrolyte solns.)