Table 2: Mean% recoveries ± standard deviation for added polycyclic aromatic hydrocarbons to black tea infusions obtained from liquid-liquid extraction with shaking after saponification step and from ultrasonication in bath water.

PAHsMean recoveries ± standard deviation
Ultrasound extractionLiquid-liquid extraction
10 ng20 ng1 ng2 ng
(0,83 ng/mL)(1,6 ng/mL)(0,25 ng/mL)(0,50 ng/mL)

Acenaphtene
Fluorene
Phenanthrene
Anthracene
Fluoranthene
Pyrene
Benz[a]anthracene
Chrysene
Benzo[b]fluoranthene
Benzo[k]fluoranthene
Benzo[a]pyrene
Dibenz[a,h]anthracene
Benzo[ghi]perylene
Indeno[1,2,3-cd]pyrene