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581.
A simple and sensitive spectrofluorimetric method was developed for the determination of ezetimibe in its pharmaceutical formulations.
The proposed method is based on investigation of the fluorescence spectral behavior of ezetimibe in sodium dodecyl sulfate
(SDS) micellar system. In aqueous solution of acetate buffer pH 5.0, the fluorescence intensity of ezetimibe was greatly enhanced,
200% enhancement, in the presence of SDS. The fluorescence intensity of ezetimibe was measured at 380 nm after excitation
at 268 nm. The fluorescence-concentration plot was rectilinear over the range of 0.03–3.0 μg/mL with lower detection limit
of 3.08 × 10−3 μg/mL. The method was successfully applied to the analysis of ezetimibe in its commercial tablets; the results were in good
agreement with those obtained with the reported method. The application of the proposed method was extended to the stability
studies of ezetimibe after exposure to different forced degradation conditions, such as acidic, alkaline, photo and oxidative
conditions, according to ICH guidelines. 相似文献
582.
Two sensitive fluorometric methods were developed for the determination of both bopindolol malonate (BOP) and celiprolol HCl (CLP) based on measuring their native fluorescence in methanol and acetonitrile, respectively. For BOP, the fluorescence was measured at 316?nm after excitation at 278?nm. The proposed method was successfully applied to the assay of commercial tablets as well as content uniformity testing. For CLP, the fluorescence was enhanced by the addition of carboxymethylcellulose solution and measured at 455?nm after excitation at 339?nm. The method was successfully applied to the analysis of CLP in tablets and biological fluids. In both methods, interference likely to be introduced from co-formulated, co-administered, or chemically related drugs was studied. The results were statistically compared with those obtained by reference methods and were found to be in good agreement. 相似文献
583.
Emad Karrar Isam A. Mohamed Ahmed Wei Wei Frederick Sarpong Charalampos Proestos Ryszard Amarowicz Emel Oz Aly Farag El Sheikha Ayman Y. Allam Fatih Oz Xingguo Wang 《Molecules (Basel, Switzerland)》2022,27(12)
In this study, the volatile compound profiles of gurum seed oil were determined using two methods: supercritical CO2 extraction (SFE) and the screw press process (SPP). For volatile compounds extraction and identification, headspace solid-phase micro-extraction (HS-SPME) and GC–MS were used, respectively. A total number of 56 volatile compounds were revealed and identified in oil extracted by SFE, while only 40 compounds were detected in extracted oil by SPP. Acids, aldehydes, esters, ketones, furans, and other components were present in the highest ratio in oil extracted by SFE. In contrast, alcohols and alkenes were found in the highest proportion in oil extracted by SPP. In this study, it was observed that SFE showed an increase in the amounts of volatile compounds and favorably impacted the aroma of gurum seed oil. The results reveal that different extraction methods significantly impact the volatile components of gurum seed oil, and this study can help evaluate the quality of the oil extracted from gurum seeds. 相似文献
584.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option. 相似文献