Abstract

Amino acids is basic structure component of protein, a determination amino acids in some agricultural product, food,...is necessary for life. Previously and now, these following methods research amino acids are Electrophoresis, Chromatographic, X-ray diffraction. In the chemical biology, these methods of examination of amino acids are complex labors, spend a lot of time. With physical methods- vibrational spectra - by FTIR-Raman spectroscopy and Diffuse Reflectance Accessory (Easi DiFF) are quickly and none destroy sample, accuracy. With quantum computation method (Ab Initio) is helpful determination mode vibrat of spectra of samples