| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Rheum palmatum | Rhizome | -- | 0.5 | * | |
| Angelica archangelica | Plant | -- | -- | Pakistan Encyclopedia Planta Medica. 1986. | |
| Iris x germanica | Rhizome | -- | -- | * | |
| Artemisia capillaris | Essential Oil | -- | -- | * | |
| Sambucus nigra | Flower | -- | -- | * | |
| Myristica fragrans | Seed | -- | -- | * | |
| Myristica fragrans | Seed Essent. Oil | -- | -- | * | |
| Cucumis melo | Root | -- | -- | * | |
| Serenoa repens | Fruit | -- | -- | * | |
| Glycyrrhiza glabra | Root | -- | -- | Kameoka, H. and Nakai, K. 1987. Components of essential oil from the root of Glycyrrhiza-glabra. Nippon Gogeikagaku Kaishi 61(9): 1119-1122. | |
| Cocos nucifera | Seed | -- | -- | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. |