New neutral carrier-based H⁺ selective membrane electrodes

Authors

Vasile V. Cosofret, The University of North Carolina at Chapel Hill
Tal M. Nahir, The University of North Carolina at Chapel Hill
Ernö Lindner, The University of North Carolina at Chapel HillFollow
Richard P. Buck, The University of North Carolina at Chapel HillFollow

Abstract

H+-selective membrane electrodes based on two neutral ion carriers of the class of phenoxazine derivatives which contain different lipophilic imino chains (9-(diethylamino)-5-octadecanoylimino-5H- benzo[a]phenoxazine and 9-(dimethylamino)-5-[4-(16-butyl-2,14-dioxo-3,15-dioxaeicosyl)phenylimino]- 5H-benzo[a]phenoxazine respectively) are described. Both ionophores, previously used as chromo-ionophores in optode construction, with added potassium tetrakis(p-chlorophenyl) borate (KTpClPB) as cation exchanger sites were embedded into a high molecular weight poly(vinyl chloride) matrix containing o-nitrophenyl octyl ether (o-NPOE) as plasticizer. Both polymeric pH electrodes exhibited near -Nernstian responses over the ranges depending on the pK of the ionophore within the membrane used as electroactive material. The selectivities and other main characteristics of the electrodes are presented. © 1992.

Publication Title

Journal of Electroanalytical Chemistry

Recommended Citation

Cosofret, V., Nahir, T., Lindner, E., & Buck, R. (1992). New neutral carrier-based H⁺ selective membrane electrodes. Journal of Electroanalytical Chemistry, 327 (1-2), 137-146. https://doi.org/10.1016/0022-0728(92)80142-Q