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'-diisobutyl-cis-cyclohexane-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.