Standard stock solution D was applied on TLC plate with the help of CAMAG LINOMAT-V automatic

sample applicator, the plate was chromatographed in twin-through glass chamber saturated with mobile phase for 30 min. After chromatographic development, the plate was removed and air dried. The separated bands on the TLC plate were scanned over the wavelength range of 200–700 nm. The wavelength 265 nm was selected for densitometric evaluation of separated bands. The overlain spectrum obtained is depicted in Fig. 4. Stationary phase: Aluminum plates precoated with silica gel 60 F254 (Merck) The retention factors of KETO, MP and PP were: KETO: 0.33 ± 0.05 selleck chemical Densitogram of KETO, MP and PP is shown in Fig. 5. The standard stock solution A containing KETO and standard stock solution B containing MP and stock solution C containing PP was applied on the TLC

plate in the range 1–6 μL with the help of micro syringe using LINOMAT-V automatic sample applicator. The plate was then developed and scanned under the above mentioned chromatographic conditions. Vorinostat mouse Rf was recorded for each drug concentration and the calibration curves of the concentration vs. Rf were constructed for both the drugs. The calibration curve for KETO and MP and PP are depicted in Fig. 6, Fig. 7 and Fig. 8 respectively. From standard stock D was appropriately to obtain final concentration 625 μg/mL KETO and 250 μg/mL MP, 25 μg/mL PP respectively. The diluted standard solutions were filtered through 0.2 μ membrane filter. After trying several permutations and combinations, the solvent system containing Toluene:Ethyl acetate:Glacial acetic acid (6.5:2.5:1.0 v/v/v) was found to be most satisfactory as it gave good resolution of both drugs. Ketoprofen gel formulation was prepared using 1% carbopol

940 and as a gelling agent. Gelling agent was dispersed Thymidine kinase in a small quantity of distilled water 75 ml and then stored overnight to ensure complete hydration. Ketoprofen in a suitable solvent (water) as added to the dispersion and make up weight with distilled water. Other excipients (Methyl Paraben 1% and propyl Paraben 0.1%) were also added slowly with continuous stirring. In carbopol gels, pH of the vehicle was brought to neutral by using TEA (Triethanolamine). The final weight of the gel was adjusted to 100 gm with distilled water. Entrapped air bubbles were removed by keeping the gels in vacuum desiccators as shown in Table 1. An accurately weighed quantity of gel was weighed equivalent to about 1000 mg of Ketoprofen and 400 mg of Methyl Paraben and 40 mg Propyl Paraben into a 1000 mL volumetric flask. And appropriate amount of methanol was then added. The mixture was ultrasonicated for 30 min with heating and allowed to cool at room temperature before adjusting to volume with methanol. The organic layer was decanted and the extraction procedure was repeated.