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THz ATR Spectroscopy for Inline Monitoring of Highly Absorbing Liquids

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Abstract

We present a THz attenuated total reflection (ATR) setup which allows for inline measurements of highly absorbing liquids. As a proof of principle, we investigate a mixture of water and ground calcium carbonate (GCC) from 5 to 40 wt%. Inline measurements prove that our THz ATR setup allows for the distinction of various concentrations. As an example, we show inline THz ATR measurements for 30 to 40 wt% for GCC watery solution, as this concentration range is of technical relevance. We obtain a sensitivity better than 2 wt%.

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Authors and Affiliations

  1. Faculty of Physics and Material Sciences Center, Philipps-Universität Marburg, Renthof 5, 35032, Marburg, Germany

    Amin Soltani, Stefan F. Busch, Jan C. Balzer & Martin Koch

  2. Papiertechnische Stiftung, Pirnaer Straße 3, 01809, Heidenau, Germany

    Patrick Plew

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  1. Amin Soltani
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  2. Stefan F. Busch
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  3. Patrick Plew
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  4. Jan C. Balzer
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  5. Martin Koch
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Correspondence to Amin Soltani.

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Soltani, A., Busch, S.F., Plew, P. et al. THz ATR Spectroscopy for Inline Monitoring of Highly Absorbing Liquids. J Infrared Milli Terahz Waves 37, 1001–1006 (2016). https://doi.org/10.1007/s10762-016-0285-6

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  • DOI: https://doi.org/10.1007/s10762-016-0285-6

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