Fig. 1. The relaxation of organic solutes in different salt solutions. (a) Spin–lattice relaxation times (T₁) for d₆–benzene in aqueous solution as a function of salt concentration. Uncertainties in the values were generally less than 2% for a 70% confidence level, and would be approximately the same size as the symbols. (b) Normalized molecular correlation times (_c) for d₆–benzene in aqueous solution as a function of salt concentration. Uncertainties in the values were generally less than 3% based on the propagated errors of both the measured T₁ values and the reported quadrupolar coupling constants. (c) Normalized _c values for d₂–dichloromethane in aqueous solution as a function of salt concentration.