Transcripción del resumen del autor. The dielectric properties of asphaltenes precipitated from four different crude oils have been studied in the frequency range of 0.01-1000 Hz by frequency domain spectroscopy (FDS). The asphaltenes were dissolved in toluene, and the dielectric response of the solutions was measured at different concentrations. To determine the precipitation point, titrations of the toluene solutions with heptane were performed and monitored by near-infrared spectroscopy. The dielectric properties of the asphaltenes were then also examined close to and well above the precipitation point.

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