CALCIUM-SELECTIVE OPTRODES WITH LASER-INDUCED FLUORESCENCE METHOD

SHIN-ICHI WAKIDA; YUJI KAWABATA; TOTARO IMASAKA; KUNISHIGE HIGASHI; NOBUHIKO ISHIBASHI

doi:10.2116/analsci.7.Supple_1469

SHIN-ICHI WAKIDA, YUJI KAWABATA, TOTARO IMASAKA, KUNISHIGE HIGASHI, NOBUHIKO ISHIBASHI

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Keywords: calcium optrode, laser-induced fluorescence method, reversible response, neutral carrier, hydrophobic fluorescent probe

JOURNAL FREE ACCESS

1991 Volume 7 Issue Supple Pages 1469-1470

DOI https://doi.org/10.2116/analsci.7.Supple_1469

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Abstract

New calcium-selective optrodes based on a Ca²⁺-sensing plasticized PVC membrane and a hydrophobic fluorescent probe were prepared with laser-induced fluorescence method. The Ca²⁺-selective optrodes showed reversible responses within 30 seconds (99% response). The optrodes based on hexadecyl-acridine orange (hexadecyl-AO⁺) showed linear resonses between fluorescent intensity and logarithm of the Ca²⁺ activity from 10^-6.5 to 10^-3M with almost the same potentiometric selectivity.

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