Quantification of polycyclic aromatic hydrocarbons in toasted guarana (Paullinia cupana) by high-performance liquid chromatography with a fluorescence detector

摘要

Samples of toasted guarana seeds with husk from Maues (Amazonia) and ten samples of different brands of guarana powder produced in different parts of Brazil were analysed in this work, aiming to identify and quantify 16 PAHs.The samples were analysed by high-performance liquid chromatography equipped with fluorescence and UV-Vis detectors. Naphthalene was identified and quantified in the guarana samples (0.13 and 0.78 μg k~(-1)) and both naphthalene and phenanthrene were found in two commercial guarana powder samples (0.36-1.54 and 0.03-0.06 μg kg~(-1) respectively). Considering that the average daily intake of guarana powder is equivalent to 10g, it can be seen that guarana powder contains less PAHs than the limit established in European legislation for other kinds of food (CE 835/2011), that is, around 0.20 μg kg~(-1) of PAHs.