title: Screening, library-assisted identification and validated quantification of oral antidiabetics of the sulfonylurea-type in plasma by atmospheric pressure chemical ionization liquid chromatography-mass spectrometry.
abstract: An atmospheric pressure chemical ionization liquid chromatographic-mass spectrometric (APCI-LC-MS) LC-MS assay is presented for fast and reliable screening and identification as well as precise and sensitive quantification of oral antidiabetics of the sulfonylurea-type (OADs) in plasma. It allowed the specific diagnosis of an overdose situation or a Munchausen syndrome caused by ingestion of OADs. After liquid-liquid extraction, the OADs glibenclamide, glibornuride, gliclazide, glimepiride, glipizide, gliquidone, glisoxepide, tolazamide and tolbutamide were separated using fast gradient elution. After screening and identification in the scan mode using our new LC-MS library, the OADs were quantified in the selected-ion mode. The quantification assay was validated according to the criteria established by the Journal of Chromatography B. All validation data were inside the required limits. The assay is part of a general LC-MS procedure for fast screening, identification and quantification of different toxicologically relevant compounds in plasma and has proven to be appropriate for OADs.
authors.affiliation: Department of Experimental and Clinical Toxicology, Institute of Experimental and Clinical Pharmacology and Toxicology, University of Saarland, D-66421 Homburg, (Saar), Germany. hans.maurer@uniklinik-saarland.de
authors.forename: Hans H
authors.initials: HH
authors.lastname: Maurer
authors.forename: Carsten
authors.initials: C
authors.lastname: Kratzsch
authors.forename: Thomas
authors.initials: T
authors.lastname: Kraemer
authors.forename: Frank T
authors.initials: FT
authors.lastname: Peters
authors.forename: Armin A
authors.initials: AA
authors.lastname: Weber
mesh_terms: D000284:Administration, Oral; D001274:Atmospheric Pressure; D002853:Chromatography, Liquid / Q000379:methods*; D006801:Humans; D007004:Hypoglycemic Agents / Q000008:administration & dosage / Q000097:blood*; D013058:Mass Spectrometry / Q000379:methods*; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013453:Sulfonylurea Compounds / Q000008:administration & dosage / Q000097:blood*
chemical_list: D007004:Hypoglycemic Agents; D013453:Sulfonylurea Compounds