Data Views Exclude Ubiquitous Chemicals Activities: 390 Chemicals w/Activities: 48 All Chemicals: 141 CSV Excel PDF Previous12345678 Show all rows. Paginate rows. Click on column headings to sort table by that column # Activity Chemical Part All Bud Flower Plant Rhizome Root Shoot Pt Low PPM High PPM StdDev *Reference 112 112 ASCORBIC-ACID Pt 315.0 5725.0 1.66 USDA's Ag Handbook 8 and sequelae) *Unless otherwise noted all references are to Duke, James A. 1992. Handbook of phytochemical constituents of GRAS herbs and other economic plants. Boca Raton, FL. CRC Press.