| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Allium cepa | Bulb | -- | -- | Malkki, Y., Nikkila, O. E., Aalto, M. 1978. The Composition and Aroma of Onions and Influencing Factors. J. Sci. Agr. Soc. Finland, 50: 103-. | |
| Allium cepa | Fruit Juice | -- | 1034.0 | Morgan, E. J. 1946. Pyruvic Acid in the Juice of Onion (Allium cepa). Nature (London), 157: 512. | |
| Allium cepa | Fruit | -- | 1034.0 | * | |
| Apium graveolens | Plant | -- | -- | * | |
| Apium graveolens | Shoot | -- | -- | * | |
| Capsella bursa-pastoris | Plant | -- | -- | * | |
| Ginkgo biloba | Pollen Or Spore | -- | -- | Jim Duke's personal files. | |
| Lycopersicon esculentum | Fruit | -- | -- | * | |
| Malus domestica | Plant | -- | -- | * | |
| Musa x paradisiaca | Leaf | -- | -- | Rizk, A.F.M. and Al-Nowaihi, A.S., The Phytochemistry of the Horticultural Plants of Qatar, Scientific and Applied Research Centre, University of Qatar. | |
| Panax ginseng | Root | -- | -- | * | |
| Panax quinquefolius | Plant | -- | 7000.0 | * | |
| Zea mays | Sprout Seedling | -- | -- | * |