Discussion
Purification of citral isomers
Isomers were identified from information obtained from analysis
by GC-FID of the CIT standard and sample of lemongrass oil
which showed greater amount of GAL than NAL (relation of
4:3 was found). The peak with higher intensity in the analysis
of the lemongrass oil by HPLC-UV was identified as GAL. The
comparison with CIT standard solution allowed the identification
of NAL peak. Furthermore, Miron et al (2012) showed that GAL and
NAL can be identified by UV analysis since the trans isomer GAL
has greater maximum in the UV spectrum (Fig. 1b)