1. Department of Genoa, Laboratory Division-Gas Chromatography Unit; Regional Agency for Environmental Protection-Liguria (ARPAL); Via Bombrini 8 16149 Genoa Italy
2. Department of Chemistry and Industrial Chemistry; University of Genoa; Via Dodecaneso 31 16146 Genoa Italy
3. Scientific Directorate; Regional Agency for Environmental Protection-Liguria (ARPAL); Via Bombrini 8 16149 Genoa Italy
4. General Directorate; Regional Agency for Environmental Protection-Liguria (ARPAL); Via Bombrini 8 16149 Genoa Italy
5. Department of Genoa, Laboratory DivisionRegional Agency for Environmental Protection-Liguria (ARPAL); Via Bombrini 8 16149 Genoa Italy