Several trans-cyclohexano crown ethers have been synthesized and studied as sensor materials for different metal cations in PVC-matrix membranes of ion-selective electrodes. The potentiometric selectivity of the membranes has been found t o correlate with the chemical structure peculiarities of the incorporated compound and can be changed by variation of the substituent attached t o the cyclohexane fragment. Some of the compounds show superior selectivity for potassium over many other metal cations.
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