Figure 3.

Multidimensional gas chromatograms and mass spectra of ¹³C-alanine enantiomers for the three polarization regimes. From left to right, amino acids l-alanine (drawn in red) and d-alanine (drawn in blue) produced by the 6.64 eV UV photo-irradiation with left-handed circularly polarized light (l-CPL), linearly polarized light (LPL), and right-handed circularly polarized light (r-CPL). The alanine produced by irradiation with r- and l-CPL shows opposite enantiomeric excesses, whereas the irradiation with LPL shows no enantiomeric excess as expected. Mass spectra for both enantiomers, given at the top of the figure, are identical.