Tamizh Mani T

A simple, specific, accurate, precise and sensitive RP- HPLC method has been developed for the rapid estimation of Alogliptin in bulk and its formulations. The chromatographic separation was carried on Phenomenex Gemini-NX-5 µm C18(2) 110A, LC Column 250 x 4.6 mm, using Acetonitrile:1-octasulphonoic acid (0.005mM) at pH-5 [60:40] (v/v) as mobile phase, at a flow rate of 1.0 ml/min.  The detection was carried out at 220 nm and drug eluted with a retention time of 3.48 min. Beer’s law was obeyed in the concentration range of 2-10?g/ml with correlation coefficient 0.9995. The method has been validated according to ICH guidelines for specificity, linearity, accuracy, precision, robustness, ruggedness, LOD and LOQ. The method was found to be specific, accurate, and precise, robust, rugged and sensitive. The developed method was good linearity, novel, rapid for the estimation of Alogliptin in bulk and tablets dosage form. Thus it can be employed for the routine analysis.

The aim of the present investigation was to design a mucoadhesive liposomal system of Repaglinide for the treatment of type - 2 diabetes mellitus that is capable of delivering entrapped drug over an extended period of time. Mucoadhesive liposomal formulations were prepared by using different ratio of lecithin and cholesterol by thin film hydration technique followed by coating of liposomes by 0.1 % w/v and 0.3 % w/v of chitosan and were evaluated for entrapment efficiency, particle size, zeta potential, surface morphology and in-vitro drug release. Particle size and zeta potential of the F2 and C2F2 formulation was found to be 413.5 nm, 830.9 nm and -40.9 mV, -46.8 mV respectively. Coating of liposomes resulted increase in particle size and also increases the zeta potential.  Highest entrapment efficiency was observed in F1, CF1 and C2F2 90%, 95% and 94%. The percent drug release from F1-F3, CF1-CF3 and C2F1-C2F3 was observed as follows F1- 79.04%, F2- 76.77%, F3- 64.32%, CF1-66.65%, CF2- 62.12%, CF3- 56.54% and C2F1- 59.1%, C2F2-56.56%, C2F3- 53.45% which follows first order drug release and non-Fickian diffusion mechanism. And mucoadhesive strength from CF2- 60%, C2F2- 74%.

A new, simple and sensitive UV-spectrophotometric method was developed for the determination of Benfotiamine in bulk and tablet dosage form. This method, involves the measurement of absorbances of Benfotiamine at the wavelength of 244nm. 0.1M HCl was used as solvent. Linearity was observed in the concentration range of 3-18µg/ml with correlation coefficient 0.999. The accuracy of the method was confirmed by recovery studies of tablet dosage forms and was found to be 99.32%-100.42% for Benfotiamine. The method showed good reproducibility and recovery with %RSD lessthan 2.0. The LOD and LOQ of Benfotiamine was found to be 0.051μg/ml and 0.155μg/ml. Results of the analysis were validated for accuracy, precision, LOD, LOQ and were found to be satisfactory. Thus the developed method was found to be simple, sensitive, rapid, precise, accurate and cost effective quality control tool for the routine analysis of Benfotiamine in bulk and tablet dosage form.

  A new, simple, economic and sensitive UV-spectrophotometric method was developed for the determination of Sorafenib in bulk and pharmaceutical formulations. The developed spectrometric method was validated for selectivity, linearity, range, precision, accuracy, ruggedness and sensitivity. The method has demonstrated excellent linearity over the range of 2-10 μg/ml with regression equation: y=0.079x-0.0081 and regression correlation coefficient r2=0.999. The developed method demonstrated consistent high recoveries (97–99%) and low relative standard deviation (< 5%) at 265 nm. Moreover, the method was found to be highly sensitive with low limit of detection (0.028 μg/ml) and limit of quantitation (0.085 μg/ml). The apparent molar absorptivity and Sandell's sensitivity was found to be 48.09 mol-1cm-1 and 0.013245 µg/cm2, respectively. The validated method was successfully employed for the drug content analysis from tablet preparations. Additionally, the method was also employed for pH metric solubility analysis of the drug.