Figure 1: Comparison between TLC (left) and HPTLC (right) analyses of Melissa officinalis extracts. Mobile phase: n-hexane, ethylacetate (9:1). Derivatization: Anisaldehyde. Visualization: UV 366. Tracks: 1-3 marketed hydroalcoholic extracts, 4 mixture of essential oil constituents (citral, limonene, myrcene).