Dichlorprop (2,4-DP) Analysis on Primesep and Obelisc HPLC Columns
Dichlorprop (2,4-DP) is an herbicide similar to 2,4-D. Dichlorprop is used to control weeds and can be found in many weed killers. Only the R-isomer of 2,4-dichloropropanoic acid is used as an herbicide. The EURL (European Union Reference Laboratory) included dichlorprop in a list of acidic pesticides which can be analyzed by a QuEChERS (Quick, Easy, Cheap, Effective, Rugged, and Safe) single residue method. 2,4-DP was separated by both Obelisc R and Primesep 100. Primesep 100 is a reverse-phase column with embedded acidic ion-pairing groups while Obelisc R is a mixed-mode column with separates using ionic groups and a long hydrophobic chain. Methods are LC/MS compatible and able to be used with many pesticides.