Posted by admin on Oct 1, 2012 in |
Two simple, economical, precise, and accurate methods are described for the simultaneous determination of Paracetamol and Diclofenac in combined tablet dosage form. The first method is first- order derivative zero crossing method. The first order derivative absorption at 275.6 nm (zero cross point of Diclofenac) was used for Paracetamol and 242.69 nm (zero cross point of Paracetamol) for Diclofenac. The second one is simultaneous equation method in application to dissolution study. Simultaneous equation method was successfully applied to carry out dissolution study of commercial tablet formulation by using USP type II dissolution test apparatus. The solvent used is pH 6.8 phosphate buffer. Linearity range was 2-10µg/ml and 5-25 µg/ml for Paracetamol and Diclofenac respectively. The methods were validated with respect to linearity, precision and...
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Posted by admin on Oct 1, 2012 in |
Symphonia globulifera L.f. (Anani) is an arboreal species, which occurs in the Amazon with antimalarial and antimicrobial properties, especially in the treatment of skin inflammations. It is also used as a general tonic and laxative for pregnant women and its sap/latex is used against rheumatism and tumors. The utilization of natural products from plant origin implies in pharmacobotanical quality control, which consist of the technical specifications of the species. Anatomical description of the leaves and petioles of Symphonia globulifera L. f. were performed. Epidermal cells on both sides of the leaves were observed; they are heterodimensional and polygonal. The stomata are anomocytic and were found only on the abaxial surface. The petiole is plan-convex coated with quadrangular cells and thick cutinization. The results are relevant to the anatomical characterization of the species since data on leaf anatomy of S. globulifera are...
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Posted by admin on Oct 1, 2012 in |
This paper described validated high performance thin layer liquid chromatographic (HPTLC) method for estimation of Rosuvastatin Calcium (ROSU) and Aspirin (ASP) in capsule dosage form. The method involved separation of components by TLC on a precoated silica gel 60 F254 using a mixture of n-Hexane: Acetone: Ethyl acetate: Formic acid (6:3:1:0.2 v/v) as a mobile phase. Detection of spots was carried out at 240 nm for Rosuvastatin Calcium and Aspirin both. The mean retardation factor for Rosuvastatin Calcium and Aspirin were found to be 0.31±0.02 and 0.60±0.02, respectively. The linear regression data for the calibration plots showed good linear relationship with r2 value 0.995 and 0.995 in the concentration range of 500-1000 ng/spot and 3750-7500 ng/spot for Rosuvastatin calcium and Aspirin, respectively. The developed method was validated as per ICH Guidelines....
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Posted by admin on Oct 1, 2012 in |
The present work was undertaken to investigate various extracts of fruit of Wrightia tinctoria (F-Apocyanacea) for anti-diabetic activity in alloxan induced diabetic rats. A comparison was made between the action of extracts and known anti-diabetic drug glibenclamide (10mg/kg body weight). Oral administration of methanolic extract at a dose of 300 mg/kg/b. wt and ethyl acetate extract at a dose of 200 mg/kg/b. wt exhibited a significant (p<0.001, p<0.001) hypoglycemic activity in normal rats and significant (p<0.001, p<0.001) anti-hyperglycemic activity in alloxan induced diabetic rats respectively. The maximum reduction in blood glucose level was observed after 4 hours in case of methanolic and ethyl acetate extracts with a percentage protection of 37% and 42% respectively. In long term treatment of alloxan induced diabetic rats the degree of protection was determined by measuring blood glucose on 0, 1, 2, 4, 7, 14th day. Both the extracts showed a significant anti-diabetic activity comparable with that of glibenclamide. These results indicate that the W. tinctoria fruit extracts possess significant anti –diabetic...
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Posted by admin on Oct 1, 2012 in |
The study describes a validated reverse-phase HPLC method for the simultaneous estimation of paracetamol and naproxen in bulk and in tablet formulation. The proposed RP-HPLC method utilizes Eclipse XDB C18 column (150 ×4.6 mm i.d., 5 μm), optimum mobile phase consisted of gradient run of initial ratio of water (pH-2.5 adjusted with orthophosphoric acid): acetonitrile (87:13) with the effluent flow rate of 1.0 ml/min, and UV detection wavelength 263 nm. The developed method was statistically validated for linearity, precision, robustness, ruggedness and specificity. The method was linear over the range of 5-80 μg/ml for paracetamol and 3-48μg/ml for naproxen. The mean recovery was 99.72% and 100.88% for paracetamol and naproxen respectively. The intermediate precision data obtained under different experimental setup was quite concurrent with less critical % RSD. The proposed method can be useful in the quality control of paracetamol and naproxen in bulk drug and drug products....
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