کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1217982 967182 2006 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Quantitative determination of 20-hydroxyecdysone in methanolic extract of twigs from Vitex polygama Cham.
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Quantitative determination of 20-hydroxyecdysone in methanolic extract of twigs from Vitex polygama Cham.
چکیده انگلیسی

20-Hydroxyecdysone (20E) is effective in stimulating protein synthesis, therefore, it has been largely used as anabolic agent in several commercial formulas. Phytochemical study of methanolic extract of twigs from Vitex polygama, used in traditional Brazilian medicine as emenagogue, yielded a large quantity of 20E. This finding led us to developing and validating a simple and reliable method to determine 20E in the surveyed extract. Chromatographic separation of 20E was achieved on a phenyl-hexyl-based column using reversed elution mode. Extract was cleaned-up by solid phase extraction employing C18 cartridge, and an absolute recovery of 97% was acquired. External standard and standard addition calibration graphs were obtained and good linearity was accomplished (r > 0.999 for both curves). The limit of quantification and detection were determined. The results for accuracy fell within the −5 to +7% range.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography B - Volume 832, Issue 1, 17 February 2006, Pages 36–40
نویسندگان
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