Pyrolysis-evolved gas-Fourier transform-infrared spectroscopy analysis of aminobutanoic acid isomers

Abstract

Linear temperature programmed pyrolysis (100-600°C)-evolved gas-Fourier transform-infrared (EG-FT-IR) analyses have been applied to the identification of the thermal reaction products of 2-, 3- and 4-aminobutanoic acids. The results of analyses indicate that many compounds in different quantities can be identified from the composition of the evolved gases, and the evaluation profiles of selected compounds depend on the amino acid structures. The pyrolysis of aminobutanoic acids involves two different reaction steps: the first is the induction period and free radical formation, determined by ESR spectroscopy, and the second is the steady-state reaction step and the formation of different organic compounds, determined by the FT-IR analysis. © 1994.