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Journal of Chromatography A Volume 279, 25 November 1983, Pages 631-642
Determination of 2,4-Dichlorophenoxyacetic acid in soils by capillary gas chromatography with ion-mobility detection Michael A. Baim, Herbert H. Hill Jr. Show more https://doi.org/10.1016/S0021-9673(01)93667-2
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Abstract A simplified procedure for quantifying 2,4-dichlorophenoxyacetic acid (2,4-D) residues in soils has been developed. Soil samples are extracted, esterified with methanol in the presence of a boron trifluoride catalyst and analyzed by capillary gas chromatography without further time-consuming cleanup steps. The success of the procedure depends on substituting a tunable selective ion-mobility detector for the commonly used electron-capture detector. By selectively monitoring the product ion formed when the methyl ester of 2,4-D undergoes electron capture, the ion-mobility detector can detect 2,4-D in the presence of other electron-capturing compounds. A recovery of 93% of 2,4-D at the 50 ppb level in spiked soils is achieved.
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