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Calorimetric, conductometric and density measurements of iteratively filtered water using 450, 200, 100 and 25 nm Millipore filters

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Abstract

This study presents some experimental results on the variation of the physico-chemical properties of pure MilliQ water, when subjected to a procedure of iterated filtration through Millipore filters with porosity ranging from 450 to 25 nm. The parameters measured were: calorimetry, electrical conductivity, density, and pH. Release of chemical impurities can be ruled out due to the nature of the materials used. As in the case of iteratively filtered water prepared using Pyrex glass filters, the specific electrical conductivity and the pH were found to increase with increasing number of iterations. There was also a dependence on the average pore size of the filters. The idea of water as a system capable of self-organization triggered by various perturbations (mechanical and/or electromagnetic) is gaining momentum. It responds to such perturbations by forming dissipative structures, i.e., far-from-equilibrium systems.

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Authors and Affiliations

  1. Department of Chemistry, University of Naples “Federico II”, Naples, Italy

    Vittorio Elia, Elena Napoli & Marcella Niccoli

  2. Department of Chemistry, University of Siena, Siena, Italy

    Nadia Marchettini

Authors
  1. Vittorio Elia
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  2. Nadia Marchettini
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  3. Elena Napoli
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  4. Marcella Niccoli
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Correspondence to Vittorio Elia.

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Elia, V., Marchettini, N., Napoli, E. et al. Calorimetric, conductometric and density measurements of iteratively filtered water using 450, 200, 100 and 25 nm Millipore filters. J Therm Anal Calorim 114, 927–936 (2013). https://doi.org/10.1007/s10973-013-3046-y

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  • DOI: https://doi.org/10.1007/s10973-013-3046-y

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