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Detection of Chemical Hazards 473
items in 23 countries was recently created ent woods after specific pyrolisis conditions
(Jakszyn et al. 2004). Formaldehyde has been and extraction protocols. In addition to
identified as promoting cancerous tumors. forming part of smoke flavorings, these
Some smoke phenols could react to form primary products can be used as such in
highly toxic nitrosophenols that could further foods. Smoke flavorings have a wide vari-
react to form toxic reaction products, such as ability of compounds, including polycyclic
nitrophenols, polymeric nitrosic compounds, aromatic hydrocarbons (Jennings 1990;
and other toxic compounds, or even catalyze Maga 1987). The toxicological effects of
the formation of nitrosamines (Bem 1995). smoke flavorings can vary significantly
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