Table 1.
Retention time of the examined lichen substances and their absorbance maxima (nm)
| Compound | Substance class | Retention time (t R ± SD)a (min) | Absorbance maxima (nm) UV spectrum |
|---|---|---|---|
| Lecanoric acid | Depside | 2.47 ± 0.10 | 212, 240, 320m |
| Gyrophoric acid | Tridepside | 4.25 ± 0.20 | 213, 270, 304 |
| Anziaic acid | Depside | 6.15 ± 0.10 | 214, 270, 309 |
| 2-O-Methyl anziaic acid | Depside | 7.44 ± 0.10 | 213, 270, 306 |
| Usnic acid | Dibenzofurane | 12.87 ± 0.10 | 234, 282 |
| Atranorin | Depside | 14.87 ± 0.20 | 212, 278, 312m |
aValues are the means of three determinations ± SD, m—minor absorbance maximum