3 November 2016 Terahertz spectroscopy of different types of water
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A potential way to distinguish quality of different types of water from 0.2~1.2 THz is demonstrated. A physical quantity combining the refractive index and absorption coefficient is used. Ultrapure water, mineral water and tap water are distinguished by this method.
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Jing Liu, Jian Zuo, Cunlin Zhang, "Terahertz spectroscopy of different types of water", Proc. SPIE 10030, Infrared, Millimeter-Wave, and Terahertz Technologies IV, 100301N (3 November 2016); doi: 10.1117/12.2245552; https://doi.org/10.1117/12.2245552

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