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Abstract
A high-performance liquid chromatographic method to determine botanical sources of Podophyllum resin via approximate podophyllotoxin content is described. North American resin contains about 10% podophyllotoxin, the Indian variety about 40%. Samples are dissolved in mobile phase solution and analyzed by HPLC using normal-phase chromatography with detection at 280 nm. Estimates of podophyllotoxin content were made using commercially available references.