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Spectrophotometric Determination of Sulfasalazine by Coupling with Diazotized p-Nitroaniline - Application to Pharmaceutical Formulations | ||
| Rafidain Journal of Science | ||
| Article 8, Volume 22, Issue 6, 2011, Pages 88-101 PDF (0 K) | ||
| DOI: 10.33899/rjs.2011.6526 | ||
| Author | ||
| Nassim M. Hameed | ||
| Abstract | ||
| A simple spectrophotometric method for the determination of sulfasalazine has been developed. The method is based on the coupling reaction of sulfasalazine in basic medium with diazotized p-nitroaniline, to form a yellow – orange water soluble azo dye that shows maximum absorption at 452 nm. Beer's law is obeyed over the concentration range 5-700 µg of sulfasalazine in a final volume of 25 ml, i.e, (0.2-28 ppm) with a molar absorptivity of 2.88×104 1.mol-1.cm-1 and Sandell's sensitivity index of 0.0138 µg. cm-2, a relative error of 0.99 to 1.0 % and a relative standard deviation of ±0.03 to ±1.09% depending on the concentration level. The proposed method has been applied to assay of sulfasalazine in pharmaceutical formulations (tablets). | ||
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