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Schematic representation of the procedure for extraction of BaP metabolites from colon cells and culture medium. The samples generated from different extraction protocols were analyzed by HPLC. The acronyms used are: SPE: solid-phase extraction; LLE: liquid-liquid extraction; SLLE: solid-supported liquid-liquid extraction; HLLE: homogeneous liquid-liquid extraction; HPLC: high performance liquid chromatography.
