Lithium ion-selective membrane electrode

Details Lithium ion-selective membrane electrode Lithium ion-selective membrane electrode

1986-07-08

1988-09-13

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204 1T, G01N 2746

Patent

active

047707593

ABSTRACT:
An electrode for determining the lithium content of a liquid sample to be tested, has a membrane containing a lithium ion selective compound and a plasticizer, the improvement wherein the plasticizer is a liquid, lipophilic dialkyl phthalate compound or a liquid phenyl phenyl ether compound that has a strong electron withdrawing group at an ortho position on one of the phenyl rings. The ion selective compound has the formula: ##STR1## wherein A is an alkyl group having between 8 and 16 carbon atoms, B is an alkyl group having between 1 and 4 carbon atoms, and each C and D is, independently, a hydrogen atom or an alkyl group having between 1 and 16 carbon atoms, provided that both C and D are not alkyl groups having greater than 4 carbon atoms.

REFERENCES:
patent: 4314895 (1982-02-01), Spaziani et al.
patent: 4361473 (1982-11-01), Young et al.
patent: 4504368 (1985-03-01), Delton et al.
patent: 4523994 (1985-06-01), Shono et al.
patent: 4554362 (1985-11-01), Shono et al.
Kitazawa et al., 106 J. Am. Chem. Soc. 6978 (1984).
Metzger et al., submitted to Anal. Chem. on Jun. 27, 1985.

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