Fate of neodecanoic acid in onion and soil

Gas chromatographic analysis of neodecanoic acids in onions

“…The overall recovery of labeled NDA was 81% and loss of radioactivity primarily occurred during evaporation of the ethyl acetate extract. Harvest residues of NDA on onions have been found to be in the range of 1 ppm when the compound is used at recommended rates of application (St. John and Lisk, 1969;Gilbert et al, 1974).…”

“…The method is capable of detecting about 0.08 ppm of NDA and has been applied to analysis of field samples.Neodecanoic acid (NDA) is a mixture of di-a-substituted saturated decanoic acids sold by Agway, Inc. under the trade name Topper 5-E. Several recent publications have described the effective use of this chemical as a desiccating agent for onion foliage, prior to harvesting (Pendergrass et al, 1969(Pendergrass et al, , 1976Isenberg and Abdel-Rahman, 1972). Previous reports have described the analysis of NDA using thin layer (Mizany, 1967; St. John and Disk, 1969) and its possible translocation by liquid scintillation chromatography (Gilbert et al, 1974) with sensitivities of 1 and 0.01 ppm, respectively. The use of pentafluorobenzyl bromide (PFBB) in producing highly electron-capturing derivatives of carboxylic acids and phenols has found numerous applications in drug-screening programs.…”