Epinephrine-Selective Electrode Based on Lipophilic 1,3-Bisbridged Cofacial-calix[6]crown-5-ether

摘要

The potentiometric response of electrode no.4 based on 1,3-bisbridged cofacial-calix[6Jcrown-5-ether(IV)gave a sub-Nernstian(45.0 mV/decade)response and the best detection limit(-log a(ep)=4.73)towards epinephrine.The responses are decreasing in the order of epinephrine > K~+,dopamine > NH4~+> norepinephrine > Na~+.It is remarkable that the proposed electrode shows the reasonable selectivity to epinephrine against other catecholamine neurotransmitters(dopamine and norepinephrine)as well as alkali metal ions.