title: Direct analysis of pharmaceutical compounds in human plasma with chromatographic resolution using an alkyl-bonded silica rod column.
abstract: Monolithic columns have been successfully used with steep gradient and high flow rates for the direct analysis of a candidate pharmaceutical compound in human plasma. The monolithic columns showed excellent robustness with nearly 300 20-microL injections of plasma (diluted 1:1 with water) being made onto one column without significant deterioration in performance. The system gave excellent sensitivity with a limit of quantification of 5 ng/mL being achieved. Unlike previous methods of direct analysis the monolithic columns showed excellent resolution even after nearly 300 plasma injections. The column performance was measured before and after the analysis of the plasma samples.
authors.affiliation: GlaxoSmithKline, DMPK Division, Park Road, Ware, Hertfordshire SG12 0DP, UK.
authors.forename: R
authors.initials: R
authors.lastname: Plumb
authors.forename: G
authors.initials: G
authors.lastname: Dear
authors.forename: D
authors.initials: D
authors.lastname: Mallett
authors.forename: J
authors.initials: J
authors.lastname: Ayrton
mesh_terms: D002850:Chromatography, Gel / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D013058:Mass Spectrometry / Q000379:methods; D004364:Pharmaceutical Preparations / Q000097:blood*; D012680:Sensitivity and Specificity; D012822:Silicon Dioxide / Q000737:chemistry
chemical_list: D004364:Pharmaceutical Preparations; D012822:Silicon Dioxide