DETERMINATION OF CAFFEINE WITH THE USE QUENCHING OF SENSIBILIZED LUMINESCENCE OF TERBIUM (III) COMPLEX

Abstract

The effect of luminescence of Tb(III) ion quenching by caffeine in sorbates complex with 1,10- phenanthroline and β-cyclodextrinin was studied. The optimal condition for the determination of caffeine by layer chromatography method was investigated. The terbium chloride (III) with 1,10- phenanthroline and β- cyclodextrinin was proposed as an enhanced solution. The optimal condition for the quenching luminescence of Tb(III) complex in sorbent phase was investigated. The simple and reliable method of the caffeine quantitative determination in caffeine beverages by the thin-layer chromatography method was developed.

Keywords

• сенсибілізована люмінесценція
• тербій
• кофеїн
• сорбція