Alkali metal ion-selective compositions and elements and a metho

Chemistry: electrical and wave energy – Processes and products

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204418, 260330, 2603303, 2603306, 549352, 549353, G01N 2730

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active

045043680

ABSTRACT:
Ion-selective compositions which comprise an ionophore, a compound capable of solvating the ionophore and a supporting matrix are disclosed. The ionophores useful in these compositions are certain crown ethers. These ion-selective compositions are particularly useful in ion-selective membranes and electrodes which are capable of selectively transporting a first ion in preference to a second ion. Such compositions, membranes and electrodes are useful for potentiometric measurement of alkali metal ions, e.g. lithium, sodium and potassium, in aqueous solutions, e.g. biological fluids. Dry-operative electrodes using these ion-selective compositions as membranes are also disclosed.

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E. Pretsch et al., Research/Development Magazine, vol. 25, No. 3, pp. 20-23, Mar. 1974.
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Aoki et al., Chemistry Letters, pp. 1583-1584, 1981.
Pedersen, J.A.C.S., 89(26), pp. 7017-7036, (1967).

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