Table 1.
Retention time of the examined lichen substances and their absorbance maxima (nm).
| Peaks no. | Compound | Retention time (t R ± SD)* (min) | Absorbance maxima (nm) UV spectrum |
|---|---|---|---|
| 1 | Salazinic acid | 3.36 ± 0.01 | 213, 238, 312 |
| 2 | Norstictic acid | 3.98 ± 0.20 | 212, 238, 310 |
| 3 | Methyl-β-orcinol carboxylate | 4.28 ± 0.05 | 218, 267, 303 |
| 4 | Ethyl haematommate | 6.15 ± 0.20 | 240, 258, 285m, 337 |
| 5 | Usnic acid | 19.16 ± 0.30 | 234, 282 |
| 6 | Atranorin | 21.71 ± 0.30 | 210, 252, 321m |
*Values are the means of three determinations ± SD, m: minor absorbance maximum.