title: Potentiometric determination of penicillins with ion-selective electrodes.
abstract: Quaternary ammonium, phosphonium and arsonium membrane electrodes sensitive to benzylpenicillin, ampicillin and oxacillin have been investigated. The order of merit of electrode performance is cetyltrioctylammonium > cetyltrioctylphosphonium > cetyltrioctylarsonium. The electrodes are suggested for use in rapid determination of penicillin drugs by direct potentiometry.
authors.affiliation: New Material Research Institute, Department of Chemical Engineering, Hunan University, Changsha 410012, People's Republic of China.
authors.forename: S Z
authors.initials: SZ
authors.lastname: Yao
authors.forename: J
authors.initials: J
authors.lastname: Shiao
authors.forename: L H
authors.initials: LH
authors.lastname: Nie