Fig. 1.

The analysis of benzo[a]pyrene content in different Camellia seed oils by HPLC. a HPLC chromatogram of a standard benzo[a]pyrene: the retention time was 21.28 min, b the analysis of benzo[a]pyrene content in Camellia seed oil extracted using continuous subcritical n-butane fluid: Benzo[a]pyrene was not found, c the analysis of benzo[a]pyrene content in crude Camellia seed oil extracted using hot pressing extraction: 26.55 μg/kg, d the analysis of benzo[a]pyrene content in refined Camellia seed oil extracted using hot pressing extraction 5.69 μg/kg