Bis-substituted benzo-15-crown-5 ethers as ion carriers in potassium ion-selective electrodes |
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| Authors: | Janusz Wasilewski Jan F Biernat |
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| Institution: | (1) Department of Biochemistry, Teacher's Training College, Zolnierska 14, 10561 Olsztyn, Poland;(2) Institute of Inorganic Chemistry and Technology and Corrosion, Technical University of Gda sk, 80952 Gdask, Poland |
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| Abstract: | Lipophilic bis-substituted ester and ether derivatives of benzo-15-crown-5 have been synthesised. The correlation between the structure and potentiometric ion-selectivity has been studied in PVC membrane ion-selective electrodes. An ion-selective potassium sensitive electrode based on 4 ,5-bis (biphenyloxymethyl)benzo-15-crown-5 exhibited the best electrode properties. The detection limit was loga
K = -5.4; logK
K,Na
ppot = -3.5. The effect of the lipophilicity of neutral carriers upon electrode performance has been also discussed. |
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| Keywords: | Crown ethers substitution lipophilicity potassium selective electrodes selectivity |
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