Assignment of unknown persons to their geographical origin by determination of stable isotopes in hair samples

Determination of Isotopic Ratios ofL-Leu

Determination of Isotopic Ratios ofL-Leucine andL-Phenylalanine and their Stable Isotope Labeled Analogues in Biological Samples by Gas Chromatography/Triple-stage Quadrupole Mass Spectrometry

✍ Schweer, Horst; Watzer, Bernhard; Seyberth, Hannsjörg W.; Steinmetz, Armin; Scha 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 600 KB

A gas chromatographic/triple-stage quadrupole mass spectrometric (GC/MS/MS) method for measuring very low levels of enrichment of [ 5,5,5-'H3 1 le leu cine and [ring-' 3C, 1 -~-phenylalanioe in plasma and lipoprotein hydrolysates is described. The amino acids were derivatized to their N-heptafluorob