Qualitative and Quantitative Analysis of Chiral Alanine by UV-visible-shortwave Near Infrared Diffuse Reflectance Spectroscopy Combined with Chemometrics
UV-visible-shortwave near infrared diffuse reflectance spectroscopy( UV-vis-SW NIR DRS) combined with chemometrics was firstly used as a new method to analyze enantiomer and its racemic compound,using D-,L- and DL- alanine as model compounds.Under the optimal measuring conditions( powder particle sizes of 100-mesh and distance between fiber probe and sample of 5. 6 mm),after spectral pretreatment and / or wavelength selection,principal component analysis( PCA) and discriminant partial least squares( PLS-DA)...