1. GAIA Research Center, Bioanalytical Department, The Goulandris Natural History Museum, 13 Levidou Street, Kifissia, GR-145 62, Greece; General Chemical State Laboratory, Pesticide Residues Laboratory, 16 Ap. Tsoha Street, Athens 115 21, Greece; and Department of Pharmacy, University of Patras, Patras 265 04, Greece