title: An improved method of sample introduction in gas chromatography-mass spectrometry of biological materials.
mesh_terms: D000470:Alkaloids / Q000032:analysis; D002188:Cannabis / Q000032:analysis; D002197:Capillary Action; D002849:Chromatography, Gas / Q000295:instrumentation / Q000379:methods*; D003365:Costs and Cost Analysis; D005069:Evaluation Studies as Topic; D013058:Mass Spectrometry / Q000295:instrumentation / Q000379:methods*; D010944:Plants / Q000032:analysis; D013261:Sterols / Q000032:analysis; D014801:Vitamin A / Q000378:metabolism
chemical_list: D000470:Alkaloids; D013261:Sterols; D014801:Vitamin A