Suggest Naproxen Sodium UV Spectroscopy Assay Method

Required naproxen sodium Assay Alternate method in UV Spectro. Diluent=? UV spectro parameters=?...

Hplc

Want to remove this hump / behavior. System is time gradient. Diluent is acetonitrile. Suggestions please..??...

Uv

Please inform me of UV calibration with total perameter and it's procese...