Polymeric membrane selective to calcium (II) ions

Details Polymeric membrane selective to calcium (II) ions Polymeric membrane selective to calcium (II) ions

1981-04-01

1983-04-05

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

G01N 2746

Patent

active

043790410

ABSTRACT:
Polymeric membrane selective to calcium (II) ions. The invention relates to a polymeric membrane selective to calcium (II) ions, formed by a solid film of plastic material, advantageously of poly(vinyl chloride), which contains an active neutral carrier in a plasticizer of the used plastic material. The active carrier is a complex of macrocyclic polyetherdiamides of the general formula ##STR1## where R.sub.1, R.sub.2, R.sub.3, R.sub.4 are H or alkyl containing 1 to 4 carbon atoms, advantageously methyl, R.sub.5 and R.sub.6 mean alkyl or arylalkyl with 6 to 10 carbon atoms, advantageously benzyl, with the calcium (II) ions and a lipophilic organic anion, advantageously with tetraphenylborate or tetra(p-chlorophenyl)borate anion.

REFERENCES:
patent: 3706649 (1972-12-01), Cosgrove et al.
patent: 3729401 (1973-04-01), Cosgrove et al.
patent: 3843505 (1974-10-01), Higuchi
patent: 3932233 (1976-01-01), Ruzicka et al.
patent: 3957607 (1976-04-01), Simon et al.
patent: 4251470 (1981-02-01), Owen et al.
Oehme et al., "Neutral Carrier Ca.sup.2+ -Microelectrode", Chimia 30, (1976), No. 3, (Marz), pp. 204-206.

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