a method is presented for measuring simultaneously five anti-convulsants ( primidone , ethosuximide , phenobarbital , carbamazepine and diphenylhydantoin ) in serum and plasma by high-performance liquid chromatography ( hplc ) using alphenal ( 5 - allyl - 5 - phenyl - barbituric acid ) as the internal standard .
C0229671
serum
C0032105
plasma