title: Simultaneous quantitation of twenty-two amino acids in nanolitre samples of biological fluid.
abstract: The technique of thin-layer chromatography and 14C-dansylation has been used for simultaneous measurements of 22 individual amino acids, taurine, serotonin, and gamma-aminobutyric acid in nanolitre samples of glomerular and renal tubule fluid. Standard curves of each amino acid mixture containing all the others showed excellent linearity at amounts ranging from 5.7.10(-13) to 1.45.10(-11) mole (regression coefficients all greater than 0.95). With careful standardization of dansylation conditions, the technique permits highly reproducible measurement of less than 1 pmole of an amino acid.
mesh_terms: D000596:Amino Acids / Q000032:analysis*; D001826:Body Fluids / Q000032:analysis*; D002855:Chromatography, Thin Layer / Q000379:methods; D003619:Dansyl Compounds / Q000032:analysis; D006801:Humans; D007678:Kidney Glomerulus / Q000032:analysis; D007684:Kidney Tubules / Q000032:analysis; D008832:Microchemistry
chemical_list: D000596:Amino Acids; D003619:Dansyl Compounds