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Retention time of the examined lichen substances and their absorbance maxima (nm).
| Compound | Substance Class | Retention time (tR ± SD) * (min) | Absorbance maxima (nm) UV spectrum |
|---|---|---|---|
| Norstictic acid | Depsidone | 4.01 ± 0.10 | 212, 239, 310 m |
| Usnic acid | Dibenzofurane | 14.54 ± 0.20 | 234, 282 |
Values are the means of three determinations ± SD;
minor absorbance maximum.
