Photocured polymers in ion-selective electrode membranes .6. Photopolymerized lithium sensitive ion-selective electrodes for flow injection potentiometry

A photocured lithium ion-selective electrode, based on the ionophore N,N-dicyclohexyl-N',N'-disobutyl-ciscyclohexane-1,2-dicarboxamide (ETH 1810), was developed and evaluated. The robust nature of the photocured membrane made it ideally suitable for measurements in flow injection potentiometry within a linear range 0.1-10(-3) M, detection limit of 5 x 10(-4) M, and sample throughput of 150 h(-1). The electrode was used successfully to determine lithium levels in pharmaceutical lithium carbonate tablets.