Photocured polymers in ion-selective electrode membranes Part 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 × 10−4 M, and sample throughput of 150 h−1. The electrode was used successfully to determine lithium levels in pharmaceutical lithium carbonate tablets.