An efficient, sensitive, and precise high-performance thin-layer chromatographic (HPTLC) method has been established for analysis of 6-gingerol in marketed Ayurvedic formulations and in the rhizomes of different varieties of
. HPTLC separation was performed on aluminum foil-backed HPTLC plates coated with 0.2-mm layers of silica gel 60 F
-hexane-acetone, 7.2:2.8 (
) as mobile phase. Plates were developed to a distance of 78 mm at 20 ± 4°C in a chamber previously saturated for 4 min. Under these condition the retention factor (
) of 6-gingerol was 0.23 and the compound was quantified at 286 nm, its wavelength of maximum absorbance. The limits of detection and quantification were 40 and 150 ng per band, respectively. Response to 6-gingerol was a linear function of amount over the range 150 to 900 ng per band; the correlation coefficient was 0.9997, indicating a good relationship between peak area and amount. Recovery from 98.46 to 101.11% showed the accuracy of the method was excellent. The method is very accurate, simple, and cost effective, and enables sensitive quantitative analysis of 6-gingerol.
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