Flow-injection on-line electrochemical separation/determination of ions using a two-step oil/water-type flow cell system.
A flow system for electrochemical separation and detection of ions was constructed by connecting two oil/water (O/W)-type flow cells, in which a long polarizable O/W interface was formed at the inner surface of a porous poly(tetrafluoroethylene) (PTFE) tube. Using this system, acetylcholine and choline ions, whose ion-transfer potentials are different by only 60 mV, could be separated and determined simultaneously. It was thus shown that the present flow system is promising for the electrochemical flow separation/detection of ions and, in principle, also for electrochromatographic separation of ions.
Gohara
Emi
E
Department of Chemistry, Graduate School of Science, Kobe University, Nada, Kobe 657-8501, Japan.
Osakai
Toshiyuki
T
D000109:Acetylcholine / Q000032:analysis*; D002794:Choline / Q000032:analysis*; D004563:Electrochemistry; D004566:Electrodes; D017022:Flow Injection Analysis; D007477:Ions / Q000032:analysis; D009821:Oils / Q000737:chemistry*; D016062:Porosity; D013499:Surface Properties; D014867:Water / Q000737:chemistry*
D007477:Ions; D009821:Oils; D014867:Water; D002794:Choline; D000109:Acetylcholine