Spectrofluorimetric determination of buparvaquone in biological fluids, food samples and a pharmaceutical formulation by using terbium-deferasirox probe

► The terbium-deferasirox complex possesses high fluorescence intensity. ► The fluorescence intensity of the complex is quenched by buparvaquone. ► Linear relationship exists between fluorescence intensity and analyte concentration. ► The method is applied for determination of buparvaquone in biological; food samples.