Fig. 8From: 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 eosin (2.5 × 10–5 M) volume on reaction with ALC 1500 ng mL−1 for spectrofluorometric method (-▲-) and eosin (1 × 10–3 M) with ALC 6 µg mL−1 for spectrophotometric method (-■-)Back to article page