Abstract: The potency of molecularly imprinted polymers (MIP) for 2,4-dichlorophenoxyacetic acid (2,4-D) in the dynamic sorption preconcentration (solid phase extraction) of 2,4-D and three other structurally related species (2,4-dichlorophenol, 2-chlorophenol, and dikamba) from aqueous solutions is assessed. The optimal conditions for preconcentration are found: 0.01 M HCl, 25-100 mL of solution, flow rate of solution 0.7 mL/min, column (15 × 2.7 mL), and sorbent weight 0.04 g. The analytes are desorbed with 1 mL of methanol and detected in the eluate by reversed-phase HPLC with spectrophotometric detection at 225 nm. The detection limit for 2,4-D makes 0.4 μg/mL without preconcentration and 0.01 μg/mL with preconcentration from a volume of 100 mL. The procedure is applied to the analysis of model mixtures based on fresh river water. Original Russian Text © S.A. Popov, Yu.A. Chumichkina, E.N. Shapovalova, S.G. Dmitrienko, Yu.A. Zolotov, 2011, published in Zhurnal Analiticheskoi Khimii, 2011, Vol. 66, No. 1, pp. 8-12.
Template and target information: 2,4-dichlorophenoxyacetic acid, 2,4-D, 2,4-dichlorophenol, 2-chlorophenol, dikamba
Author keywords: 2,4-dichlorophenoxyacetic acid, molecularly imprinted polymer, preconcentration, HPLC determination