Method for concentration determination of lithium ions

Details Method for concentration determination of lithium ions Method for concentration determination of lithium ions

1989-03-14

1990-09-11

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

204419, G01N 27333

Patent

active

049560620

ABSTRACT:
A highly sensitive and reliable electrochemical method is proposed for the determination of the lithium ion concentration in an aqueous medium, e.g., blood of a patient suffering depression and administrated with a lithium-containing medicament, by measuring the electromotive force between the medium and a powdery non-selective electrode, which is a non-stoichiometric composite oxide of lithium and manganese of the formula Li.sub.x Mn.sub.2 O.sub.4, x being a positive number smaller than 1, prepared by partially leaching lithium ions out of a spinel-type lithium manganate LiMn.sub.2 O.sub.4 with an acid, dipped in the medium. The ion-selective electrode can be in the form of a thin film or coating layer on an electrode element. This film or layer can be formed of a polymeric resin as a binder for the powdery composite oxide.

REFERENCES:
patent: 3809638 (1974-05-01), Higashiyama et al.
patent: 3909384 (1975-09-01), Sasinski et al.
patent: 4504368 (1985-03-01), Delton et al.
patent: 4613422 (1986-09-01), Lauks
patent: 4665049 (1987-05-01), Miyai et al.
patent: 4770759 (1988-09-01), Young et al.

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