Inversion-voltammetric determination of heavy metal ions on electrodes modified with mono- and bis-N-thiophosphoryl thiourea

Abstract

A method is proposed for determining Ni2+, Co2+, Cu2+, Cd2+, and Pb2+ ions by inversion voltammetry on carbon-paste electrodes modified with N- diisopropoxythiophosphoryl-N′-phenyl thiourea and its derivatives: N,N′-bis-(diisopropoxythiophosphorylamidothiocarbonyl)-1, 5-diamino-3-oxapentane, N,N′-bis- (diisopropoxythiophosphorylamidothiocarbonyl)-1,8-diamino-3,6-dioxaoctane and N,N′-bis-(diisopropoxythiophosphorylaminothiocarbonyl)-1, 10-diaza-18-crown-6.