Large organic cation-selective electrodes

Details Large organic cation-selective electrodes Large organic cation-selective electrodes

1981-02-27

1983-08-16

Tung, T.

Chemistry: electrical and wave energy

Processes and products

204418, G01N 2746

Patent

active

043990029

ABSTRACT:
Concentrations of large organic cationic species in aqueous solution are measured as a function of potentiometric response, employing a cation-selective electrode having a high degree of selectivity for large organic cationic species with respect to both smaller organic cationic species and inorganic cationic species. The electrode is formed with a cation-selective membrane component composed of a polymeric matrix having dispersed or dissolved therein a cation exchange material whose counter-anion is a high molecular weight alkyl or alkaryl sulfonate or sulphate. By proper choice of the cationic moiety of the cation exchange material, the electrode may be made selective for a variety of large organic cationic species, including a number of such species which are of pharmaceutical or clinical interest, thereby enabling potentiometric assays for such species.

REFERENCES:
patent: 3445365 (1969-05-01), Ross
patent: 4115209 (1978-09-01), Freiser et al.
patent: 4297194 (1981-10-01), Dotson et al.
Analytical Chemistry, vol. 51, No. 8, Jul., 1979, pp. 1328 & 1329.
Analytical Chemistry, vol. 53, No. 6, May, 1981, pp. 902-904.

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