Abstract
In this study, we investigated a new, simple, sensitive, selective and precise high-performance thin-layer chromatography (HPTLC) fingerprint and quantitative estimation method for the routine analysis of curcumin in Curcuma species viz. Curcuma amada, Curcuma caesia, Curcuma longa and Curcuma zedoaria. Linear ascending development was carried out in a twin-trough glass chamber saturated with toluene:acetic acid (4:1; v/v with 20minutes of saturation). The plate was dried and analyzed by CAMAG TLC scanner III at white light and 366nm. The system was found to give compact spots for curcumin (Rf 0.42). The relationship between the concentration of standard solutions and the peak response is linear within the concentration range of 10-70ng/spot for curcumin. In result, curcumin was not detected in any of C. caesia extracts. The percentage of curcumin was found between 0.042 and 4.908 (%w/w) in different Curcuma species obtained by two different extraction methods viz. Soxhlet and sonication, respectively. Further, extraction via Soxhlet method is most suitable method to get higher curcumin content from rhizomes. The proposed HPTLC method may be use for routine quality testing and quantification of curcumin in Curcuma samples.
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