PMC:7532132 / 9708-10517 JSONTXT

{"target":"http://pubannotation.org/docs/sourcedb/PMC/sourceid/7532132","sourcedb":"PMC","sourceid":"7532132","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7532132","text":"UV analysis was used to produce a calibration curve of known concentrations of ibuprofen sodium. Absorbance values were measured using a Perkin Elmer Lambda 35 UV/VIS spectrometer. 0.05 g of ibuprofen sodium was weighed and dissolved in 100 mL of ethanol to form a stock solution, then diluted. A small volume of each solution was placed in a 4-mL quartz cuvette to measure absorbance values at a wavelength of 263 nm and obtain a calibration curve. Drug content was determined in 1 cm × 1 cm film samples that were weighed and dissolved in 10 mL of ethanol. Film samples with a weight of approximately 0.03 g were used. Samples were left in ethanol for 3 days, and the solution was then filtered through a 0.45-μm filter. Samples were then analyzed spectrophotometrically at 263 nm to determine drug content.","tracks":[]}