Dielectric loss of dioctyl phthalate at ultra high frequencies

The dielectric loss of dioctyl phthalate in solutions of benzene and liquid paraffin has been measured over the frequency range 105 to 2.35×1010 c/s. In benzene the system is characterized by a single relaxation time and the variation of tan ¿ with frequency conforms to the original Debye theory. In liquid paraffin, the system is characterized by a spectrum of relaxation times. The values of the dipole moment determined from these two sets of measurements agree within 2¿ per cent.