Some smoked foods may also be contami nated with nitropoly cyclic aromatic hydro carbons. In smoked sausages, 1-nitropyrene, 2-nitronaphtalene, and 2-nitrofluorene were found in concentrations of about 4.2, 8.4, and 19.6 ng/g, respectively, while in roasted coffee beans the concentrations were 2.4, 4.0 and 30.1 ng/g.