Luminescence-based determination of ytterbium (III) and morin in solution using sorption by transcarpathian clinoptilolite

Sorption-luminescent methods for ytterbium and morin determination based on the clinoptilolite were proposed. Optimal luminescent material preparation condition is the sorption of Yb(III) on the precalcined at 50 degrees C clinoptilolite in the solution with pH 8.0. The obtained clinoptilolite-Yb(III) sample was treated with morin solution. Definable range of Yb(III) concentration with the detection limit of 0.1 mu g center dot mL(-1) is within 0.25-1.0 mu g center dot mL(-1). The proposed method can be used for ytterbium determination in the presence of many rare earths. The range of the determination concentrations of morin is 3 center dot x 10(-4) - 4 center dot x 10(-3 )mol center dot L-1. The detection limit is 1.5 center dot x center dot 10(-4 )mol center dot L-1.