title: [Determination of tryptophan in human serum by high-performance liquid chromatography].
abstract: In this paper a high-performance liquid chromatographic(HPLC) method has been developed to determine the concentration of tryptophan(Trp) in human serum. Serum sample was precipitated with trichloroacetic acid solution(0.6 mol.L-1) to remove protein and centrifuged and assayed by HPLC. The operating conditions were NOVA-PAK C18 column(3.9 mm x 150 mm), KH2PO4(0.1 mol.L-1) mobile phase with flow rate of 0.7 ml.min-1, and detective wave-length at 295 nm. The linear range was 1.223-2447.381 mumol.L-1. The detection limit was 0.612 mumol.L-1. The average recovery was 96.3%. Intra-assay CV is less than 4% and inter-assay less than 5%. The concentration of Trp in normal adult serum was 46.603 +/- 5.108 mumol.L-1. The detection time of serum Trp was within 5 min. The results suggest that this method is simple, fast, accurate, and convenient.
authors.affiliation: Clinical Laboratory, Second Affiliated Hospital, Hunan Medical University, Changsha.
authors.forename: A
authors.initials: A
authors.lastname: Tang
authors.forename: Q
authors.initials: Q
authors.lastname: Meng
authors.forename: J
authors.initials: J
authors.lastname: Wang
mesh_terms: D000328:Adult; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D006801:Humans; D014364:Tryptophan / Q000097:blood*
chemical_list: D014364:Tryptophan