title: A comparison of thermospray and direct liquid introduction high-performance liquid chromatography/mass spectrometry for the analysis of candidate antimalarials.
abstract: The analysis of antimalarials by high-performance liquid chromatography (HPLC)/mass spectrometry demonstrates a new dimension in specificity along with increased sensitivity compared to conventional HPLC detection methods. Both direct liquid introduction and thermospray HPLC/mass spectrometry interfaces provided molecular weight information as well as characteristic fragment ions for antimalarials not normally amenable to direct probe or gas chromatographic/mass spectrometric techniques. The direct liquid introduction interface, which incorporated a 1/100 split, showed a detection limit of 30 ng using selected ion monitoring. The thermospray technique showed less than 1 ng detection limits using selected ion monitoring.
mesh_terms: D000818:Animals; D000962:Antimalarials / Q000097:blood*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004285:Dogs; D013058:Mass Spectrometry / Q000379:methods*; D010616:Phenanthrenes / Q000097:blood
chemical_list: D000962:Antimalarials; D010616:Phenanthrenes; C044961:1,3-dichloro-6-trifluoromethyl-9-phenanthryl-3-(n-butyl)aminopropanol; C023768:halofantrine