... Haginaka J, Wakai J (1985) High-performance liquid-chromatographic assay of ampicillin, amoxicillin and cicla-cillin in serum and urine using a pre-column reaction with 1,2,4-triazole and mercury(II) ... cefaman-dole, aspirin, diclofenac, alcofenac, lonazolac, piroxicam, ibuprofen, indomethacin, ketopro-fen, naproxen, phenylbutazone, mefenamic acid and ca eine. e total analysis time per sample ... Application of ion-exchange cartridge clean-up in food analysis. IV. Confirmatory assay of benzylpenicillin, phenoxymethylpenicillin, oxacillin, cloxacillin, nafcillin and dicloxacillin in bovine...