Determination of amlodipine using terbium-sensitized luminescence in the presence of europium(III) as a co-luminescence reagent.

A sensitive time-resolved luminescence method for the determination of amlodipine (AM) in methanol and in aqueous solution is described. The method is based on the luminescence sensitization of terbium (Tb(3+) ) by formation of a ternary complex with AM in the presence of tri-n-octylphosphine oxide (TOPO) as co-ligand, dodecylbenzenesulfate as surfactant and europium ion as a co-luminescence reagent. The signal for Tb-AM-TOPO is monitored at λex  = 242 nm and λem  = 550 nm.

Determination of meloxicam using europium sensitized luminescence in the presence of co-luminescence reagents.

A sensitive time-resolved luminescence method for the determination of meloxicam (MX) in methanol and in aqueous solution is described. The method is based on the luminescence sensitization of europium (Eu(3+)) by formation of ternary complex with MX in the presence of 1,10-phenanthroline as coligand, Tween-80 as surfactant and gadolinium ion as a co-luminescence reagent. The signal for Eu-MX-1,10-phenanthroline is monitored at λ(ex) = 360 nm and λ(em) = 620 nm.