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Relative extraction yields for DNPH (gray bars) and MDA-DNPH (black bars) using various organic solvents and solvent mixtures. Extraction of the aqueous reaction mixture was performed twice with 250 μl of the mentioned solvents. Data are the mean of two to four replicates. EA, ethyl acetate; MTBE, methyl tert-butyl ether; Tol, toluene; Hex, hexane; Cy, cyclohexane.
