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Optimised steam distillation conditions and yields (x ± stdev) of the studied plant materials.
| Plant Material | Sample | Distillation Time (h) |
Yield (% w/w, x ± Stdev) |
|---|---|---|---|
| Air-dried Angelica (roots) | 1 | 4.5 | 1.0 ± 0.3 |
| Air-dried marsh Labrador tea (stems and leaves) | 2 | 5 | 1.8 ± 0.1 |
| Freshly frozen marsh Labrador tea (stems and leaves) | 2b | 5 | 1.2 ± 0.3 |
| Air-dried tansy (inflorescences) | 3 | 3.5 | 0.76 ± 0.08 |
| Freshly frozen common tansy (inflorescences) | 3b | 4.5 | 0.20 ± 0.05 |
