1. Transport of Metals Across Membranes / K. Simkiss and M. G. Taylor -- 2. Interactions between Trace Metals and Aquatic Organisms: A Critique of the Free-ion Activity Model / P. G. C. Campbell -- 3. Environmental Organometallic Chemistry of Mercury, Tin and Lead: Present Status and Perspectives / E. Pelletier -- 4. Problems in Trace Metal Speciation Modeling / D. R. Turner -- 5. Trace Metal Speciation of Labile Chemical Species in Natural Waters: Electrochemical Methods / A. M. Mota and M. M. Correia dos Santos -- 6. Trace Metal Speciation of Labile Chemical Species in Natural Waters and Sediments: Non-Electrochemical Approaches / S. Apte and G. E. Batley -- 7. Chromatographic Approaches to Trace Element Speciation of Non-Labile Chemical Species / W. D. Marshall and G.-M. Momplaisir -- 8. The Trophic Transfer of Metals in Marine Systems / N. S. Fisher and J. R. Reinfelder
9. Biological Factors Involved in Metal Concentrations Observed in Aquatic Organisms / W. J. Langston and S. K. Spence -- 10. Metal Detoxification in Aquatic Organisms / A. Z. Mason and K. D. Jenkins -- 11. Prediction of Metal Toxicity in Nature from Bioassays: Limitations and Research Needs / S. N. Luoma