Flow Injection Photosensitized Chemiluminescence of Luminol with Cu(II)-Rose Bengal: Mechanistic Approach and Vitamin A and C Determination

Table 2

Analytical performance and analyte determination in pharmaceuticals by the proposed method ().

Figures of merit	Vitamin A	Vitamin C	Rose Bengal
Calibration equation [= intensity, = concentration (μg/mL)]
Linear range (μg/mL)	0.05–15	0.01–20	0.1–50
Limit of detection (μg/mL, / = 3)	0.008	0.005	0.05
Sample throughput	70	70	30
Pharmaceutical formulations	Proposed method results/; (labeled values) (μg)	Proposed method results/; (labeled values) (mg)	Proposed method results/; (labeled values) (%)
Capsules	210 ± 3/(200)	—	—
Chewable dragee	9975 ± 5/(9900)	97 ± 6/(100)	—
Eye drops (0.6 mL)	—	—	1 ± 0.1/(1)
Injections	3378 ± 4/(3300)	—	—
Tablets	—	509 ± 5 mg/(500)	—