The first direct measurements of the rate of transfer of a probe molecule across an interfacial layer have been made at PSI, using TF and ALC-MuSR. This application for beamtime to continue the work at ISIS is being made because of the uncertainty about the time available at PSI for ALC experiments which will depend on the progress of the new high field instrument. Furthermore we hope to establish the suitability of ISIS for future ALC experiments in soft matter. More appropriate control data are required for the analysis of the ALC data acquired to date. Objectives:1. Determine the proton hyperfine coupling constants for muoniated allyl alcohol in an aqueous 2.7 M NaBr solution over the temperature range 290 - 323 K. 2. Determine the proton hyperfine coupling constants for muoniated allyl alcohol in heptane with 0.5 M AOT over the temperature range 290 - 323 K.