Selective detection of underivatized 2,4-dichlorophenoxyacetic acid in soil by supercritical fluid chromatography with ion mobility detection.
A simplified procedure was developed for the determination of 2,4-dichlorophenoxyacetic acid (2,4-D) in soils. Soil samples were separated by supercritical fluid chromatography after extraction without derivatization and without the use of column chromatography for cleanup. Interferences in the chromatographic separation were eliminated by using a tunably selective ion mobility detector. An atmospheric pressure ion formed by the free acid was selectively monitored so the detector could monitor 2,4-D in the presence of other electron-capturing compounds. For a randomly chosen soil sample, the level of 2,4-D detected was estimated at 500 ppb.
Morrissey
M A
MA
Department of Chemistry, Washington State University, Pullman 99164-4630.
Hill
H H
HH
D015084:2,4-Dichlorophenoxyacetic Acid / Q000032:analysis*; D002853:Chromatography, Liquid; D012989:Soil Pollutants / Q000032:analysis*
D012989:Soil Pollutants; D015084:2,4-Dichlorophenoxyacetic Acid