Abstract
Mesembrine-type alkaloids are reported to be responsible for the psychoactive properties of Sceletium tortuosum. The aim of the study was to develop a simple, rapid, and precise high-performance thin-layer chromatography densitometric method for the simultaneous determination of mesembrenol, mesembranol, mesembrine, and mesebrenone in S. tortuosum raw materials and commercial products. Silica gel 60 F254 pre-coated glass plates were used with a mobile phase of dichloromethane-MeOH-10% NH3 (90:10:0.1, v/v). Densitometric quantification was performed in absorbance mode at 280 nm, and good separation was obtained using a single mobile phase. Regression analyses of the calibration data showed good linear relationships with regression coefficient (r2) values ranging from 0.994 to 0.999. The method was validated for linearity, accuracy, limit of detection, limit of quantification, and precision (repeatability). The results showed good correlation with data obtained from gas chromatography/mass spectrometry anal...
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