Fig. 1. High performance liquid chromatography (HPLC) chromatograms of naphthalene (10 mg/L), surfactants (10 mg/L), and natural organic matter (NOM, 10 mg/L) at 254 nm. (a) Naphthalene in water, (b) naphthalene in sodium dodecyl sulfate (SDS) and NOM solution, and (c) naphthalene in Triton X-100 and NOM solution.

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