Figure 4: Chromatogram of a black tea sample: 1: naphthalene, 2: acenaphtene, 3: fluorene, 4: phenanthrene, 5: anthracene, 6: fluoranthene, 7: pyrene, 9: chrysene, 11: benzo[k]fluoranthene, and 12: benzo[a]pyrene. Chromatographic conditions as reported in Section 2.5.