Liquid-liquid extraction-programmed temperature vaporizer-gas chromatography-mass spectrometry for the determination of polycyclic aromatic hydrocarbons in saliva samples. Application to the occupational exposure of firefighters

1. Santos, P.M.
2. del Nogal Sánchez, M.
3. Pérez Pavón, J.L.
4. Cordero, B.M.
5. Fernández, R.V.