Indirect Spectrophotometric Estimation of Ciprofloxacin Hydrochloride in Pharmaceuticals using N-Bromosuccinimide and Methylene Blue Dye

Document Type : Original Article


Department of Chemistry/ College of Science/ University of Mosul/ Iraq


The present study aims to develop a swift , simple, accurate and sensitive spectrophotometric method for determination of Ciprofloxacin Hydrochloride ( CPFX ) in pure and pharmaceutical formulations. The suggested method depend on oxidation of CPFX with known excess amount of N-bromosuccinimide ( NBS ) in acidic medium and after reaction is insured to be complete , the surplus NBS is estimated by de colorization of methylene blue dye and measuring the absorbance of surplus dye at 665 nm . A linear calibration curve was obtained over the concentration range 0.5 – 4.5 μ with correlation coefficient of 0.9993 . The molar absorptivity and sandell's sensitivity index values were determined to be 8.6 ×104 and 0.004276 µ, respectively .The limit of detection (LOD) and quantification (LOQ) were calculated to be 0.0033 and 0.0111 μ, respectively . The proposed method has been successfully applied to the determination of CIPH in available dosage form, the validity proposed method was confirmed by recovery study via standard addition technique .


Main Subjects

Volume 65, Issue 1 - Serial Number 1
January 2022
Pages 207-214
  • Receive Date: 09 June 2021
  • Revise Date: 01 July 2021
  • Accept Date: 11 July 2021
  • First Publish Date: 13 July 2021