Laboratory analysis of 2,4-D and dicamba residues in soil
1994
Voos, G. | Groffman, P.M. | Pfeil, M.
Soil residues of 2,4-D (2,4-dichlorophenoxyacetic acid) and dicamba (2-methoxy-3,6-dichlorobenzoic acid) were extracted using a solid-phase extraction technique and quantified using high-performance liquid chromatography (HPLC) during 80-day field and laboratory experiments. Five soil materials collected within a heterogeneous landscape were used during the laboratory microcosm study; four of these were represented in the accompanying field study. Five samples per material were created during the course of each study to evaluate extraction efficiency and the HPLC limit of detection. Average percent recovery of 2,4-D during the laboratory study ranged from 50 to 77% and during the field study ranged from 25 to 67%. Average percent recovery of dicamba during the laboratory study ranged from 79 to 114% and during the field study ranged from 65 to 137%. There was a negative relationship between organic matter content and extraction efficiency.
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