Part 1 Thermodynamics and modelling of separations: the adsorption of gas mixtures in molecular sieves - the suitability and limitations of the ideal adsorbed solution theory, P. Bruckner and L.V.C. Rees; a mixing model for the calculation of the solubilities of solids and their mixtures in supercritical fluids, P.-C. Chen et al; a detailed model for a simulated continuous countercurrent adsorption system, M.M. Hassan et al. Part 2 Separation technology and ultrapurification: a. using sorbents - carbon molecular sieves for air separation, J. Armor; industrial gas separation using PSA, G.V. Baron; activated carbon principles, Y. Hamerlinck and D.H. Mertens; inorganic porous materials, E.F. Vansant; separation by chemical processes - the role of reactor selection, W.P.M. van Swaaij and G.F. Versteeg; lithium chabazite - synthesis and air separation properties, C.G. Coe et al; gas adsorption properties of cation modified alumina pillared montmorillonite, A. Molinard and E.F. Vansant; b. using membranes - micro-porous ceramic membranes for gas separation - synthesis, gas transport and separation properties, R.S.A. de Lange; application of pervaporation in environmental technology, C. Vandecasteele and C. Dotrement; permeate flux enhancement using a baffle in microfiltration with mineral membrane, B.B. Gupta et al; separation of nitrogen and organic vapors by pillared clay-carbon composite membrane, Z.-H. Hu et al; molecular - sieve inorganic membranes - adsorption, permeation, diffusion, and topology, Y.H. Ma et al; on the effect of thermal regeneration on CO[2] absorption kinetics in amine solutions, G. Andersson and D. Eimer; on-line extraction of polymers, oligomers, additives and monomers by multiple solvents on packed HPLC columns, W.J. Staal; a thermodynamic basis for chemical separation by selective inorganic ion exhanger, M. Tsuji and S. Komarneni; a novel method for separating dispersed matter from a fluid medium by means of electrostatic repulsive force, G.C. Yeh and B.V. Yeh. Part 3 Separation technology in environmental applications: photosynthetic membranes in industrial wastewaters treatment, separation and recovery of valuable products - a case study with (dicyano) aurate (I) and (dicyano) argentate(I) ions, I.R. Bellobono; vapor-phase adsorption of benzene, toluene and xylene by a new adsorbent modified elutrilithe, Z.-H. Hu et al; the adsorption of phosphates from aqueous solutions using alumina pillared montmorillonite, A. Molinard et al. Part 4 Gas measurements: ensuring international comparabilty of gas measurements through traceability to the mole, our SI unit for amount of substance, P. De Bievre. (Part Contents).