Chemicals and Reagents: Reference standard of
Ciprofloxacin & Naproxen were collected from
Incepta Pharmaceuticals Ltd, Bangladesh.
Dipotassium hydrogen phosphate and
potassium orthophosphate were purchased
from BDH (UK) Ltd. All other ingredients used
were of analytical grade. Instruments: UVVisible
spectrophotometer (HACH, model-
DR/4000 UV-VIS), Electric balance (Denver
instrument, model- M-310), Digital pH meter
(LIDA instrument, model- PHS-25)