Studies on response characteristics of drug ise's. (III)--Erythromycin electrodes and their selectivity toward quaternary ammoniums.
Erythromycin sensitive electrodes have been proposed. Their selectivity toward quaternary ammoniums is described in terms of induction effect and steric hindrance effect: logKij = a1I-a2Z/R + a0, where I is induction effect index, a1, a2 and a0 are coefficients which depend on the electro-active material. A general formula has been suggested to relate the electrode selectivity to the carbon atom number (n) of the alkyl of the quaternary ammonium; logKij = A/2.7n-B/(0.80+1.26n)+C, where A, B and C are coefficients which depend on the electro-active material. logKij tends to a limited value C when n increases.
New Material Research Institute, Hunan University, Changsha.
S Z
SZ
Yao
J
J
Xiao
L H
LH
Nie
D000641:Ammonia; D004566:Electrodes; D004917:Erythromycin / Q000032:analysis*
D004917:Erythromycin; D000641:Ammonia