Fig. 6From: Determination of antihistaminic drugs alcaftadine and olopatadine hydrochloride via ion-pairing with eosin Y as a spectrofluorimetric and spectrophotometric probe: application to dosage formsEffect of acetate buffer volume on the reaction of eosin (2.5 × 10−5 M) with1500 ng mL−1ALC for the spectrofluorometric method (-▲-) and eosin (1 × 10–3 M) with 6 µg mL−1 ALC for the spectrophotometric method (-■-)Back to article page