Resumen

NEACSU, Ana; GHEORGHE, Daniela; TECUCEANU, Victorita  y  PERIşANU, Ştefan. Investigation of thermochemical Features of Gamma Irradiated Tryptophan Stereoisomers. J. Mex. Chem. Soc [online]. 2022, vol.66, n.1, pp.42-56.  Epub 05-Dic-2022. ISSN 1870-249X.  https://doi.org/10.29356/jmcs.v66i1.1627.

In this work, the use of differential scanning calorimetry (DSC) is demonstrated as a powerful technique that can provide accurate thermodynamic property values of nutritional supplements such as tryptophan. Nutritional supplements require a decontamination procedure and irradiation appears as a promising technique for this purpose. The valuable properties of tryptophan for food and pharmaceutical industry as dietary supplement have led to increasing interest in its technological behaviour. L-, D- isomers and DL-racemic mixture of tryptophan irradiated and non-irradiated were studied by DSC. Irradiation was performed at room temperature with gamma radiations using a 137Cs source, the irradiation dose range was between 0.6 - 10 kGy. Two steps decomposition pattern for both irradiated and non-irradiated samples up to 350 ºC was found. Fourier transform infrared spectroscopic studies were performed. The obtained results indicate that the irradiation process does not inhibit the thermal properties of tryptophan when irradiated up to 10 kGy. The HPLC method was employed to evidence the degradation of the irradiated material.

Palabras llave : Tryptophan isomers; DSC; FTIR; HPLC; gamma irradiation.