recovery

A simple UV-Visible spectrophotometric method is developed for the simultaneous determination of Ebastine and Phenylephrine hydrochloride in pharmaceutical dosage form using  the  first order derivative spectrophotometric method. The determination of both the drugs is based on the respective zero crossing point (ZCP) of their first order derivative spectra obtained in methanol. The first order derivative spectra were obtained using methanol as a solvent and the determinations were made at 241.0 nm (ZCP of Phenylephrine HCl) for Ebastine and 232.0 nm (ZCP of Ebastine) for Phenylephrine hydrochloride. The linearity was obtained in the concentration range of 4-24 μg/ml for both drugs and correlation coefficient (r2) were found to be 0.9994 and 0.9991 for Ebastine and Phenylephrine hydrochloride respectively. The percentage purity of drugs in combined tablet dosage form was found to be 100.02 % for Ebastine and 99.89 % for Phenylephrine hydrochloride. The % recoveries were found to be 99.88% for Ebastine and 99.24% for Phenylephrine hydrochloride.  The method was found to be simple, accurate and precise and was applicable for the simultaneous determination of Ebastine and Phenylephrine in tablet dosage form.

The present manuscript describes simple, sensitive, rapid, accurate, precise and economical second derivative spectrophotometric method for the simultaneous determination of Paracetamol and Pamabrom in dosage form. The derivative spectrophotometric method was based on the determination of both the drugs at their respective zero crossing point (ZCP). The second order derivative spectra were obtained in dist. water and the determinations were made at 268.2 nm (ZCP of Pamabrom) for Paracetamol and 225.0 nm (ZCP of Paracetamol) for Pamabrom. The linearity was obtained in the concentration range of 4-18 μg/ml for Paracetamol and 2-16 μg/ml for Pamabrom The method was found to be simple, sensitive, accurate and precise and was applicable for the simultaneous determination of Paracetamol and Pamabrom in pharmaceutical tablet dosage form.

The present manuscript describe simple, sensitive, rapid, accurate, precise and economical first derivative spectrophotometric method for the simultaneous determination of nebivolol and hydrochlorothiazide in combined tablet dosage form. The derivative spectrophotometric method was based on the determination of both the drugs at their respective zero crossing point (ZCP). The first order derivative spectra were obtained in methanol and the determinations were made at 270.5 nm (ZCP of hydrochlorothiazide) for nebivolol and 282.5 nm (ZCP of nebivolol) for hydrochlorothiazide. The linearity was obtained in the concentration range of 5-100 μg/ml for nebivolol and 2-14 μg/ml for hydrochlorothiazide. The mean recovery was 100.04 + 0.93 and 99.87 + 1.16 for nebivolol and hydrochlorothiazide, respectively. The method was found to be simple, sensitive, accurate and precise and was applicable for the simultaneous determination of nebivolol and hydrochlorothiazide in pharmaceutical tablet dosage form. The results of analysis have been validated statistically and by recovery studies. Key words: Nebivolol, hydrochlorothiazide, recovery, first order derivative spectrophotometric method, tablet, validation.

  A simple, sensitive and accurate spectrophotometric method was developed in ultraviolet region for the estimation of Glibenclamide in pure drug, pharmaceutical formulation. Linear response obtained was in the concentration range of 5-30µg/ml with correlation coefficient of 0.999 in acetronitrile: 0.2M NaOH (20:80). Excellent recovery proved that the method was sufficiently accurate. There is no interference from any common pharmaceutical additives and diluents. Results of the analysis were validated by recovery studies according to ICH Q2B guidelines. Key words: Glibenclamide, UV- Spectrophotometry, recovery, accuracy.

  The present manuscript describe simple, sensitive, rapid, accurate, precise and economical first derivative spectrophotometric method for the simultaneous determination of nebivolol and hydrochlorothiazide in combined tablet dosage form. The derivative spectrophotometric method was based on the determination of both the drugs at their respective zero crossing point (ZCP). The first order derivative spectra were obtained in methanol and the determinations were made at 270.5 nm (ZCP of hydrochlorothiazide) for nebivolol and 282.5 nm (ZCP of nebivolol) for hydrochlorothiazide. The linearity was obtained in the concentration range of 5-100 μg/ml for nebivolol and 2-14 μg/ml for hydrochlorothiazide. The mean recovery was 100.04 + 0.93 and 99.87 + 1.16 for nebivolol and hydrochlorothiazide, respectively. The method was found to be simple, sensitive, accurate and precise and was applicable for the simultaneous determination of nebivolol and hydrochlorothiazide in pharmaceutical tablet dosage form. The results of analysis have been validated statistically and by recovery studies.     Key words: Nebivolol, hydrochlorothiazide, recovery, first order derivative spectrophotometric method, tablet, validation.

  A simple, sensitive and accurate spectrophotometric method was developed in ultraviolet region for the estimation of Clopidogrel bisulfate in pure drug, pharmaceutical formulation. Linear response obtained was in the concentration range of 25-50 µg/ml with correlation coefficient of 0.999 in 0.1 N HCl. Excellent recovery proved that the method was sufficiently accurate. There is no interference from any common pharmaceutical additives and diluents. Results of the analysis were validated by recovery studies according to ICH Q2B guidelines.  

  The present manuscript describe simple, sensitive, rapid, accurate, precise and economical spectrophotometric method for the simultaneous determination of Ofloxacin and Cefpodoxime proxetil in combined tablet dosage form. The method is based on the simultaneous equations for analysis of both the drugs using methanol as solvent. Ofloxacin has absorbance maxima at 297 nm and cefpodoxime proxetil has absorbance maxima at 236.2 nm in methanol. The linearity was obtained in the concentration range of 2-12 μg/ml and 4-24 μg/ml for Ofloxacin and Cefpodoxime proxetil, respectively. The concentrations of the drugs were determined by using simultaneous equations at both the wavelengths. The mean recovery was 99.63 ± 0.47 and 99.57 ± 0.36 for Ofloxacin and Cefpodoxime proxetil, respectively. The method was successfully applied to pharmaceutical dosage form because no interference from the tablet excipients was found. The suitability of this method for the quantitative determination of Ofloxacin and Cefpodoxime proxetil was proved by validation. The proposed method was found to be simple and sensitive for the routine quality control application of Ofloxacin and Cefpodoxime proxetil in pharmaceutical tablet dosage form. The results of analysis have been validated statistically and by recovery studies.   Key words: Cefpodoxime proxetil, Ofloxacin, recovery, simultaneous equations method, tablet, validation.