infrared millimeter terahertz waves scientific conferences

In the present paper, we present a novel process monitoring method for dehydration of ethanol, based on the terahertz time-domain total attenuated reflection spectroscopy (THz-ATR) system that can be used for measurement of an optical constant while circulating through the ATR surface. Based on the obtained results, we observed a significantly close relationship between the moisture content in ethanol and the refractive index in the THz range. The proposed system successfully evaluated the dehydration of ethanol rapidly and non-destructively. This method is expected to contribute into real-time measurements related to the chemical reactions for the quality control in pharmaceutical manufacturing.