between_the_eyes (Stranger) 05-04-04 18:07 No 504799				corvalolum -> phenobarbital(extraction)
						What is the best way to extract and purify phenobarbital from corvalolum. corvalolum is a mixture containig: ethyl ester of a-bromo-iso-valeric acid - 2 g phenobarbital - 2 g peppermint oil -2 g NaOH  -3 g ethyl alcohol - 50-60 ml water -         40 ml