The determination of quizalofop-p-tefuryl, Pantera, and metabolites in soils using GC/MSD
- Uniroyal Chemical Co. Inc., Middlebury, CT (United States)
- EnviroTest Labs., Inc., Edmonton, Alberta (Canada)
A published procedure for the analysis of herbicides in soil and sediment was adapted for determining residues of Pantera, quizalofop-p-tefuryl, and its metabolites. Soil is extracted by shaking with a solvent mixture of acetone/0.05N HCL, followed by 0.1 N KOH. The extracts are combined, acidified and then partitioned with methylene chloride. The organic phase is concentrated to 1.0 mL. One half the sample is reacted with diazomethane and analyzed for parent compound and the methyl derivative of the acid metabolite, quizalofop, by GC/MSD with no further workup. The other half is reacted with diazomethane using an elevated temperature, to form volatile methyl derivatives of the metabolites; chlorohydroxyquinoxaline, and chloroquinoxaline phenol. Recoveries were determined at 0.02 ppm, the level of detection, and at 0.20 ppm. The average recovery value for all analytes was greater than 90%.
- OSTI ID:
- 126053
- Report Number(s):
- CONF-950402--
- Country of Publication:
- United States
- Language:
- English
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