title: Simultaneous detection and quantification of acidic and basic drugs in serum toxicological screening: use of ion-pairing technique in liquid-liquid extraction.
abstract: The toxicological screening, using the combination of high performance liquid chromatography with diode array ultraviolet detector and ion-pairing technique in liquid-liquid extraction, is an effective tool in the identification and quantification of the acidic and basic substances in a single run. The use of an ion-pairing technique in the conventional extraction shows the co-extraction of the uncharged and charged form of the analytes present in a serum sample. The stationary phase used is C-18-bonded phase. The mobile phase is acetonitrile--phosphate buffer (pH 3; 25 mM) containing 25 mM triethylammonium as ion-pairing agent. The analytical validation shows reproducible recoveries, good day-to-day repeatability and sensible results compatible with clinical and forensic use.
authors.affiliation: Laboratoire de Toxicologie et Monitoring Thérapeutique, Cliniques Universitaires Saint-Luc, Bruxelles.
authors.forename: M
authors.initials: M
authors.lastname: Brau
authors.forename: R
authors.initials: R
authors.lastname: Vanbinst
authors.forename: A
authors.initials: A
authors.lastname: Hassoun
authors.forename: P E
authors.initials: PE
authors.lastname: Wallemacq
mesh_terms: D000208:Acute Disease; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D002852:Chromatography, Ion Exchange / Q000379:methods*; D002853:Chromatography, Liquid / Q000379:methods*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D011041:Poisoning / Q000097:blood* / Q000175:diagnosis*; D015203:Reproducibility of Results; D015813:Substance Abuse Detection / Q000379:methods*