“…The solvent systems employed included (1) chloroform-ethanol-heptane (1:1:1, v/v);[23] (2) n-butanol-acetic acid-water (50:15:35, v/v);[1] (3) n-butanol-acetic acid-water (100:20:48, v/v);[24] and (4) ethanol-methanol (50:50, v/v). [25] All experiments were performed at a temperature of 25°C ± 2°C with a tank saturation time of 1 h. The spots were sprayed with different reagents for the identification of products such as P -dimethylamino benzaldehyde spray, diazotization followed by alkaline beta-naphthol spray, diazotization followed by N-1-naphthyl-ethylenediamine spray, exposure to iodine vapors, and examination under UV light at 254 and 350 nm (Uvitec Lamp, UK).…”