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Zingiber cassumunar (Zingiberaceae) has been widely used as a traditional medicine in southeast Asia, especially Thailand, for treatment of asthma, inflammation, and joint pain. (E)-4-(3,4-dimethoxyphenyl)butadiene, or DMPBD, a major component in the rhizome, has been reported to be an active anti-inflammatory agent. This research developed a TLC-densitometry method for the simultaneous quantification of DMPBD in the rhizome extracts of four varieties of Z. cassumunar. DMPBD was found in the range of 1.80 +/- 0.01 to 3.23 +/- 0.10% (w/w). The method was validated for linearity, precision, accuracy, robustness, LOD, and LOQ. The linearity was indicated by a good regression coefficient 0.9940 and covered the range of 130 to 703 ng/band. Intraday and interday precision (RSD) were less than 2%. Accuracy of the method was evaluated by a recovery study conducted at three different levels; the average recovery was 103.1%. The LOD and LOQ were 10 and 40 ng, respectively. The proposed TLC-densitometry method was simple, precise, specific, sensitive, and inexpensive. This method can be used for routine QC of raw materials of Z. cassumunar rhizomes, extracts, and its products, especially Prasaplai, a Thai traditional medicine for relieving dysmenorrhea.


Prasan Tangyuenyongwatana, Vichien Keeratinijakal, Wandee Gritsanapani. Thin-layer chromatography-densitometry analysis of dimethoxyphenylbutadiene content in Zingiber cassumunar rhizomes. Journal of AOAC International. 2012 Nov-Dec;95(6):1614-7

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PMID: 23451376

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