Fig. 9From: 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 volume on reaction of eosin (5 × 10–4 M) with 1200 ng mL−1 OLO for spectrofluorimetric method -▲- and eosin (1 × 10–3 M) with 6 µg mL−1 OLO for spectrophotometric method -■-Back to article page