Measurements, performed at atmospheric pressure on mixtures made up of decane plus various distributions of heavy normal paraffins from octadecane to triacontane, were carried out to provide information on wax content (amount and composition) as function of temperature. At various temperatures below the wax appearance temperature, liquid and solid phases in partially frozen mixtures were separated by isothermal filtration and analyzed by gas chromatography. Amount and composition of both phases were then deduced from mass balance after correction of the entrapped liquid in the solid residue. Furthermore, the L-S equilibrium data obtained are compared with the values predicted by means of several models.