Naphtho-crown ethers as ionophores in ion-selective electrodes

Timothy L. Blair; Sylvia Daunert; Leonidas G. Bachas

doi:10.1016/S0003-2670(00)81900-5

Naphtho-crown ethers as ionophores in ion-selective electrodes

Timothy L. Blair, Sylvia Daunert, Leonidas G. Bachas

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Poly (vinyl chloride) membrane electrodes based on three naphtho-crown ethers (naphtho-15-crown-5, naphtho-18-crown-6 and dinaphtho-30-crown-10) are characterized. These ionophores may provide inexpensive alternatives to valinomycin for potassium-selective electrodes. All three crowns give near-Nernstian responses to potassium under appropriate conditions and excellent selectivity for potassium over sodium can be obtained. With naphtho-18-crown-6, an improved response to cesium is observed as the ionophore concentration in the membrane is increased. The characteristics of each electrode are dependent on the concentration of crown and the choice of plasticizer.

Original language	English (US)
Pages (from-to)	253-261
Number of pages	9
Journal	Analytica Chimica Acta
Volume	222
Issue number	1
DOIs	https://doi.org/10.1016/S0003-2670(00)81900-5
State	Published - 1989
Externally published	Yes

ASJC Scopus subject areas

Analytical Chemistry
Biochemistry
Environmental Chemistry
Spectroscopy

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AU - Daunert, Sylvia

AU - Bachas, Leonidas G.

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AB - Poly (vinyl chloride) membrane electrodes based on three naphtho-crown ethers (naphtho-15-crown-5, naphtho-18-crown-6 and dinaphtho-30-crown-10) are characterized. These ionophores may provide inexpensive alternatives to valinomycin for potassium-selective electrodes. All three crowns give near-Nernstian responses to potassium under appropriate conditions and excellent selectivity for potassium over sodium can be obtained. With naphtho-18-crown-6, an improved response to cesium is observed as the ionophore concentration in the membrane is increased. The characteristics of each electrode are dependent on the concentration of crown and the choice of plasticizer.

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