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Several quaternary phosphonium salts have been used as the site materials for construc-tion of carbonate ion electrodes. Among them the electrode based on hexadecyltriphenylphospho-nium salt showed best performance characteristics. The Nerstian response range of the electrode isfrom 1×10~(-2) down to 6.3×10~(-7) mol·dm~(-3) with a detection limit of 1.8×10~(-7)mol·dm~(-3).Theselectivity order of ions can be altered by the introduction of trifluoroacetyl-tert-butylbenzene as asolvent mediator. The strong solvatoin of the primary ion of interest in the membrane phase by thesolvent mediator favors the improvement of the selectivity of the proposed electrode.
Several quaternary phosphonium salts have been used as the site materials for construc tion of carbonate ion electrodes. Among them the electrode based on hexadecyltriphenylphospho-nium salt showed best performance characteristics. The Nerstian response range of the electrode is from 1 × 10 ~ (-2 ) to 6.3 × 10 ~ (-7) mol · dm -3 (-3) with a detection limit of 1.8 × 10 -7 mol · dm -3. Thesequence of order of ions can be altered by the introduction of trifluoroacetyl-tert-butylbenzene as asolvent mediator. The strong solvatoin of the primary ion of interest in the membrane phase by the solvent mediator favors the improvement of the selectivity of the proposed electrode.