title: Sensitive stereospecific determination of acenocoumarol and phenprocoumon in plasma by high-performance liquid chromatography.
abstract: We describe a normal-phase HPLC method for the stereospecific determination of R- and S-acenocoumarol and R- and S-phenprocoumon with S-warfarin as internal standard. The compounds were separated using a Whelk-O1 chiral stationary phase, detected by UV at 310 nm and quantified in the internal standard mode. Linearity was verified for acenocoumarol in the range of 15-2000 microg/l and for phenprocoumon from 15 to 2200 microg/l, respectively. The detection limits were 5 microg/l for all compounds. The recovery was >84% for R- and S-acenocoumarol and >74% for R- and S-phenprocoumon. The imprecision (C.V.) (50-1800 microg/l) for R- and S-acenocoumarol was <4.7% within-day and <7.8% between-day. For R- and S-phenprocoumon the respective values were <5.6% and <5.9%. The accuracy for all compounds was 96.5-110%.
authors.affiliation: Institute of Clinical Chemistry, University Hospital Zürich, Switzerland. rentsch@ikc.unizh.ch
authors.forename: K M
authors.initials: KM
authors.lastname: Rentsch
authors.forename: U
authors.initials: U
authors.lastname: Gutteck-Amsler
authors.forename: R
authors.initials: R
authors.lastname: Bührer
authors.forename: K E
authors.initials: KE
authors.lastname: Fattinger
authors.forename: D J
authors.initials: DJ
authors.lastname: Vonderschmitt
mesh_terms: D000074:Acenocoumarol / Q000097:blood*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006801:Humans; D010644:Phenprocoumon / Q000097:blood*; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet; D013237:Stereoisomerism
chemical_list: D000074:Acenocoumarol; D010644:Phenprocoumon