Determination of phenylalanine and tyrosine in dried blood specimens by ion-exchange chromatography using the Hitachi L-8800 analyzer

Simultaneous determination of concentrat

Simultaneous determination of concentrations and stable isotope enrichments of α-ketoisocaproic acid, leucine, phenylalanine and tyrosine in blood plasma by gas chromatography/negative ion mass spectrometry

✍ W. Kulik; L. van Toledo-Eppinga; R. M. Kok; W. S. Guérand; H. N. Lafeber 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 625 KB

## Abstract A simple procedure for the extraction and derivatization of α‐amino acids and α‐keto acids from human plasma is described. This stable isotope dilution method permits the quantification of isotopic enrichment and concentrations of several α‐keto and α‐amino acids simultaneously. The der