Taylor dispersion has been used to measure ternary mutual diffusion coefficients (D-11, D-12, D-21, and D-22) for aqueous solutions of caffeine (1) with added salt (2) (LiCl, NaCl, KCl, RbCl, CsCl, or NiCl2). The measurements were made at 25 degrees C and salt concentrations up to 1.00 mol dm(-3). Salt effects on the transport of caffeine are assessed by comparing the diffusion coefficient of caffeine in salt-free solutions with the caffeine main diffusion coefficient (D-11) measured for the caffeine + salt solutions. Coupled diffusion of caffeine and salt, as indicated by cross-diffusion coefficients D-12 and D-21, is discussed in terms of salting-out effects and the possible formation of caffeine-metal ion complexes. (c) 2012 Elsevier B.V. All rights reserved.