A Micelle-Enhanced Spectrofluorimetric Determination of Pirfenidone: Application to Content Uniformity Testing and Human Urine

• Published in: Journal of fluorescence Vol. 28; no. 4; pp. 951 - 957
• Main Authors: Sambhani, Naga Gayatri, Biju, Valsala Madhavan Nair
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.07.2018; Springer Nature B.V
• Subjects: Analytical Chemistry; Biochemistry; Biological and Medical Physics; Biomedical and Life Sciences; Biomedicine; Biophysics; Biotechnology; Fluorescence; Formulations; Human wastes; Original Article; Pharmaceuticals; Urine; Spiked human urine; Tween – 80; Pirfenidone; Spectrofluorimetry; Content uniformity testing
• ISSN: 1053-0509; 1573-4994
• DOI: 10.1007/s10895-018-2258-8

The present manuscript gives a detailed account of highly selective, validated and sensitive method for quantification of pirfenidone in its pharmaceutical dosage forms and spiked human urine. The developed method is relied on the systematic study of the fluorescence action of Pirfenidone in Tween – 80 micellar medium. The Pirfenidone exhibits strong fluorescence at λ em 396 nm upon excitation at λ ex 318 nm in Tween −80 medium. The fluorescence - concentration plot was linear over concentration range of 0.5 – 5 μg/mL. There was greater extent (1.02 fold) of enhancement in fluorescence intensity in presence of tween – 80 with very low limit of detection and quantitation of 0.04 μg/mL and 0.11 μg/mL respectively. The application of developed methodology is successfully applied to content uniformity testing and spiked human urine. The proposed study was successfully applied for analysis of pirfenidone in commercially available pharmaceutical formulations.