简介:Abstract:A combined gas chromatography combustion—isotope ratio mass spectrometry
method(GC—C IRM S)for stable carbon isotope analysis of amino acids is presented.Un—
like hydrocarbons amino acids require derivatizatio简介:Abstract:A combined gas chromatography combustion—isotope ratio mass spectrometry
method(GC—C IRM S)for stable carbon isotope analysis of amino acids is presented.Un—
like hydrocarbons amino acids require derivatization prior to GC—C—IRM S analysis.Repli—
cate carbon isotope analyses of trifluoroacetyl isopropyl ester derivatives of 1 7 amino acids
by IRM S revealed that the derivatization process is reproducible. Due to a reproducible
isotopic fractionation an empirical correction factor for each individual amino acid iS derived
separately for derivatives and the original 。C value of the underivatized amino acid is cal—
CUlated.详细>