[Determination of eugenol, methyleugenol and methylisoeugenol in volatile oil of differently processed nutmeg]

A HPLC method for the determination of eugenol, methyleugenol and methylisoeugenol in the volatile oil of differently processed natmeg has been used. The result has shown that the content of eugenol is only sliahtly changed before and after processing, but that of methyleugenol and methylisoeugenol has obviously increased.

[Investigation and experimental study on the standards and quality of leech pieces]

It has been confirmed by investigation that Whitmania pigra is the main medicinal breed of leech, and filiform pieces are the best for extraction. The quality of leech processed by 3 different methods has been studied qualitatively and quantitatively in terms of amounts of extraction, TLC, electrophoresis of protein and anti-thrombin action.