Fig. 4From: Eco-friendly, sensitive and inventive first derivative synchronous spectrofluorimetric determination of ciprofloxacin and phenylephrine in their pure form, single and combined eye dropsFirst derivative synchronous fluorescence spectra of: A PLN (0.05 µg/mL). B CFX (1.5 µg/mL). C Synthetic mixture of PLN/CFX (0.05 /1.5 µg/mL)Back to article page