nd This book collects the scientific contributions from the lecturers at the 2 edition of the "International School on Marine Chemistry" held in Ustica (Palermo, Italy) from 5 to 12 September 1998. The School was planned with the aim of giving an overview about the chemical processes occurring in the marine environment and the more recent ana­ lytical methodologies for their study. The School was organised under the auspices of the Italian Chemical Society and with the financial support of the Marine Reserve of Ustica Island, the Committee for Environment of Italian CNR, the University of Palermo, the Provincia Regionale of Palermo and the Shimadzu-Italia Corporation. The book has been printed with the fi­ nancial support of the ''Assessorato Ambiente" of the Provincia Regionale of Palermo. All the participants, about a hundred including the lecturers and the Organising Committee, are grateful for the generous support of the agencies. A particular ac­ knowledgement from the Editors is to all the lecturers for their availability and cour­ tesy and for the high quality of their scientific contributions.

- Environmental Analytical Chemistry as a Tool for Studying Chemical Processes in Marine Environments.- 1 The Carbonate System in Marine Environments.- 2 Marine Organic Geochemistry: A General Overview.- 3 Photooxidation of Dissolved Organic Matter: Role for Carbon Bioavailability and for the Penetration Depth of Solar UV-Radiation.- 5 Organic Matter Preservation in the Ocean: Lipid Behavior from Plankton to Sediments.- 6 Organic Chemical Reaction Rates in the Ocean: Molecular Approaches to Studying Extracellular Biochemical Processes.- 7 Vapour-Particle Phase Interactions of Some Selected Persistent Organic Pollutants in the Marine Atmosphere.- 8 Determination of Organic Complexation.- 9 Organic Complexation of Metals in Sea Water.- 10 Occurence, Pathways and Bioaccumulation of Organometallic Compounds in Marine Environments.- 11 Hydrolysis Processes of Organotin(IV) Compounds in Sea Water.- 12 119Sn Mössbauer Spectroscopy Studies on the Interaction of Organotin(IV) Salts and Complexes with Biological Systems and Molecules.- 13 Mercury in Marine Environments.- 14 Occurrence, Formation and Fate of Organoantimony Compounds in Marine and Terrestrial Environments.- 15 Redox Processes of Chromium in Sea Water.- 16 Oceanic DOC Measurements.- 17 Characterization of Marine Toxins by Means of Liquid Chromatography - Electrospray Ionization - Mass Spectrometry.- 18 Metals Analysis by High Performance Liquid Chromatography.- 19 PIXE Analysis for Trace Elements in Marine Environments.- 20 Potentiometry for the Study of Acid-Base Properties of Sediments.- 21 Chemometrics for Sampling and Analysis: Theory and Environmental Applications.- 22 Chemometric Applications to Seawater Analysis.