In the research sky is the limit. Though HPLC and GC-MS analysis what not you can do, you can do wonders for analysis phytochemical compounds (PRS) for the aromatic plants for their profiling, identification and quantification of PRS etc., Volatile compounds their identification and profiling though comparing with library of mass spectroscopic data etc., sample paper of CCRAS-CARI, Jhansi shared to help you. All the best
Sachin Aj After the preliminary phytochemical examination of a medicinal plants, GC-MS can provide a detail of the possible chemical compounds present in the sample under investigation. Depending upon the bio-activity of the screened compounds, these can further be isolated and characterized.