title: Determination of stable isotopic enrichment in individual plasma amino acids by chemical ionization mass spectrometry.
mesh_terms: D000596:Amino Acids / Q000097:blood*; D002849:Chromatography, Gas; D004355:Drug Stability; D007553:Isotope Labeling; D013058:Mass Spectrometry / Q000379:methods; D008832:Microchemistry
chemical_list: D000596:Amino Acids