Spectrophotometric Estimation of Torsemide in Tablet Dosage Form Using Chemical Derivatization Technique
Abstract
A simple and cost effective spectrophotometric method is described for the determination of Torsemidein pure form and in pharmaceutical formulations. The method is based on the formation derivative when the drug reacts with picric acid solution. The colored derivative solution has an absorption maximum at 350 nm; also obeys Beer's law in the concentration range 5-25µg/mL. The absorbance was found to increase linearly with increasing concentration of torsemide, which is corroborated by the calculated correlation coefficient value of 0.997. The slope and intercept of the equation of the regression line are 0.035 and 0.002 respectively. The optimum experimental parameters for the reaction have been studied. The validity of the described procedure was assessed. Statistical analysis of the results has been carried out revealing high accuracy and good precision. The proposed method was successfully applied to the determination of Torsemide in pharmaceutical formulations.Keywords:
Torsemide, chemical derivatization, UV-SpectrophotometryReferences
1. Blose, J. L., Adams. K. F. and Patterson, J. H. 1995. Torsemide: a pyridine-sulfonylurea loop diuretic. Ann Pharmaco Ther. 29:396-402.
2. Krishna, M..V., Sankar. D.G. 2007. Simple spectrophotometric determination of torsemidein bulk drug and in formulation. European Journal of Chemistry.5:73-478.
3. Barroso, M.B., Alonso R.M., Jiménez and R. M. 2001. Simultaneous Determination of Torasemide and Its Major Metabolite M5 in Human Urine by High-Performance Liquid Chromatography-Electrochemical Detection. Journal of Chromatographic Sciences, 6:491-496.
4. Engelhardt, S., Meineke. I. and Brockmöller. J. 2004. Improved solid-phase extraction and HPLC measurement of torasemide and its important metabolites. Journal of Chromatography B. 831: 31-35.
5. ICH-Guidelines Q2A, Validation of Analytical Procedures: Definition and terminology (CPMP III/5626/94) March (1995) Geneva, Switzerland.
6. ICH-Guidelines Q2B, Validation of Analytical Procedures: Methodology (CPMP/ICH/281/95) November (1996) Geneva, Switzerland..
7. Maryadele, J. O'Neil, Patrica, Heckelman, E. Koch, C. B., Raman. K. J., Kenny. C. M. and D'Arecca R. 2006. The Merck Index An Encyclopedia of Chemicals, Drugs and Biologicals, 14th ed, Vol-1, 275. UK Longman Group Ltd.
8. United State Pharmacopoeia/ National Formulary, published by United State Convention 2009, vol-3 pp-3774
9. Willard, H. H., Merritt, L. L., Dean, S. A. and Settle, F. A., 2006. Instrumental Methods of Analysis; 7th Edition, India. CBS Publishers & Distributors. 148.
10. Skoog, West and Holler 1992. Fundamental of Analytical Chemistry, 7thed, Australia. Saunders College Publishing, 147.
11. Chatwal, G. R. and Anand, S. K. 2004. Instrumental Methods of Chemical Analysis, 5thed, India. Himalaya Publishing House. 2.107-2.110.
12. Beckett, A. H. and Stenlake, J. B. 1997. Practical Pharmaceutical Chemistry, 7th ed, Part Two, India. CBS Publishers & Distributors. 75.
13. Furniss, B., Hannaford, A.J., Smith, P. W. and Totchell, A. R. 2007. Vogel's Textbook of Practical Organic Chemistry, 5th ed, Pearson Education, 835, 929-927.
14. Chan, C. C., Lam, H. and Lee Y. C. 2004. Analytical method validation and instrument performance verification, A John wiley & sons, inc., publication, 11-15
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