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Simultaneous densitometric determination of β-sitosterol and lupeol through validated HPTLC method in different plant parts of Uraria picta (Jacq.) Desv. ex DC. – A dashmool species

Saxena Hari Om, Parihar Samiksha, Pawar Ganesh, Rao G. Rajeshwar

Acta Chromatographica

2023

Vol. 35, no. 1

99--105

β-sitosterol (BS) and lupeol (LU) exhibit a number of biological activities and are the important bioactive marker compounds in pharmaceutical science. In the present study, a simple, precise, accurate and validated high performance thin layer chromatographic (HPTLC) method was developed for simultaneous quantification of these two compounds in leaves, stem and roots of Uraria picta, a critically endangered medicinal plant and one of the important constituents of ten plants ayurvedic formulation called Dashmoola. Standards and test samples were applied on TLC aluminum plate precoated with 0.2 mm layer of silica gel 60F254. The plate was run in a twin glass chamber comprising toluene: methanol: chloroform (8:1:1, v/v/v) as a mobile phase. The plates were immersed in anisaldehyde-sulfuric reagent and then heated at 105 °C for 5 min in CAMAG TLC plate heater for appearance of bands. Densitometric scanning was performed at λmax = 525 nm using tungsten light source in CAMAG TLC Scanner4 armed with WinCATS software. RF values of BS and LU standards and those of test samples were found to be 0.53 ± 0.01 and 0.63 ± 0.01 respectively. The method was further validated by following the International Conference of Harmonization (ICH) guidelines. For BS and LU, the linear regression data for the calibration plots revealed a satisfactory linear association with r2 = 0.995 and 0.998, respectively. Linear range for both BS and LU was 200–600 ng/band. Accuracy of the method was evaluated by performing recovery study at three different levels by standard addition methods with an average recovery of 99.86% and 101.07%. The results revealed that the leaf samples of U. picta contained highest concentration of BS (0.150 ± 0.02%) while its root samples confined the highest concentration of LU (0.149 ± 0.01%). The developed method can be applied for routine and quality control analysis in different herbal formulations containing U. picta species.

Występowanie kwasów tłuszczowych i steroli w środowisku naturalnym

Łobos-Moysa E., Dudziak M.

Proceedings of ECOpole

2016

Vol. 10, No. 1

209--217

Postęp w rozwoju technik analitycznych umożliwia obecnie oznaczanie bardzo dużej liczby zanieczyszczeń organicznych występujących w środowisku naturalnym. Część tych zanieczyszczeń jest pochodzenia naturalnego. Aktualnie badania ukierunkowane są głównie na zanieczyszczenia specyficzne, których obecność jest wynikiem antropogenicznego oddziaływania na środowisko naturalne. W celu oceny występowania specyficznych zanieczyszczeń i mikrozanieczyszczeń w środowisku naturalnym, tj. wybranych kwasów tłuszczowych nienasyconych - oleinowego i linolowego oraz kwasu nasyconego - palmitynowego, a także steroli stigmasterolu i β-sitosterolu oraz betuliny, opracowano techniki ich wydzielania i ich chromatograficznej analizy. Analizę jakościowo-ilościową zarówno kwasów tłuszczowych, jak i steroli wykonywano przy użyciu chromatografu GC / ion trap / MS (model Saturn 2100 T firmy Varian) wyposażonego w kolumnę chromatograficzną VF-5ms (Varian). Do wydzielania związków zastosowano różne techniki ekstrakcji. W przedstawionych w pracy badaniach prowadzono monitoring występowania zanieczyszczeń w wodach powierzchniowych Górnego Śląska (Wójtowianka (Doa), Potok Rokitnicki, rzeka Bytomka, rzeka Kłodnica i Kanał Gliwicki) w okresie od stycznia do czerwca 2015 roku.

Nowadays, advances in the analytical techniques allow the determination of hundreds of organic pollutants present in the environment. Some of organic pollutants are of natural origin. Although the current study are mainly aimed at specific pollution, the presence of which is the result of anthropogenic impacts on the environment. In order to assess the appearance of specific pollutants and micropollutants in the environment ie the selected unsaturated fatty acids: oleic, linoleic, saturated acid: palmitic and sterols: stigmasterol, β-sitosterol and betulin, the techniques for their isolation and analysis have been developed. Quality and quantity analysis of fatty acids and sterols was carried out using GC/ion trap/MS chromatographic system (model Saturn 2100 T, Varian) equipped with a chromatography column VF-5ms (Varian). Various extraction techniques have been used for isolation of the pollutants. In this study the monitoring of level of contamination in surface water of Upper Silesia (Wójtowianka (Doa) Stream, Rokitnica Stream, Bytomka River, Klodnica River and Gliwice Channel) was conducted in the period from January to June in the 2015.

Triterpenes in traditional and supercritical-fluid extracts of Morus alba leaf and stem bark

Böszörményi A, Szarka Sz., Héthelyi É, Gyurján I, László M, Simándi B, Szőke É, Lemberkovics É

Acta Chromatographica

2009

Vol. 21, no. 4

659--669

Our objectives were to establish a GC method capable of quantitative analysis of terpenoids without derivatisation and to examine the amount of β -sitosterol extracted from Morus alba L. leaf and stem bark by use of traditional organic solvent extraction and supercritical-fluid extraction (SFE). To measure β -sitosterol content without derivatization, GC-FID was used with 5- α -cholestan-3-one as internal standard. To identify terpenoid constituents, GC-MS was used; β -sitosterol, phytol, lanost-7-en-3-on, α -amyrin, β -amyrin, and lupeol were identified. We established that for Morus leaf the best SFE method for β -sitosterol was pilot scale SFE; the β -sitosterol content of this extract was higher than that of the hexane solvent extract. Among analytical SFE conditions, 200 bar for 90 min and 300 bar for 60 min resulted in extraction of the most β -sitosterol. For mulberry stem bark, solvent extraction with hexane and SFE at 400 bar and 40°C for 60 min proved the best methods.