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@ARTICLE{Huisman:824736,
      author       = {Huisman, Johan Alexander and Zimmermann, Egon and Esser,
                      Odilia and Haegel, Franz-Hubert and Treichel, Andrea and
                      Vereecken, Harry},
      title        = {{E}valuation of a novel correction procedure to remove
                      electrode impedance effects from broadband {SIP}
                      measurements},
      journal      = {Journal of applied geophysics},
      volume       = {135},
      issn         = {0926-9851},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2016-07291},
      pages        = {466 - 473},
      year         = {2016},
      abstract     = {Broadband spectral induced polarization (SIP) measurements
                      of the complex electrical resistivity can be affected by the
                      contact impedance of the potential electrodes above 100 Hz.
                      In this study, we present a correction procedure to remove
                      electrode impedance effects from SIP measurements to improve
                      the accuracy of broadband complex electrical resistivity
                      measurements. The first step in this correction procedure is
                      to estimate the electrode impedance using a measurement with
                      reversed current and potential electrodes. In a second step,
                      this estimated electrode impedance is used to correct SIP
                      measurements based on a simplified electrical model of the
                      SIP measurement system. We evaluated this new correction
                      procedure using SIP measurements on water because of the
                      well-defined dielectric properties. It was found that the
                      difference between the corrected and expected phase of the
                      complex electrical resistivity of water was below 0.1 mrad
                      at 1 kHz for a wide range of electrode impedances. In
                      addition, SIP measurements on a saturated unconsolidated
                      sediment sample with two types of potential electrodes
                      showed that the measured phase of the electrical resistivity
                      was very similar (difference < 0.2 mrad) up to a frequency
                      of 10 kHz after the effect of the different electrode
                      impedances was removed. Finally, SIP measurements on
                      variably saturated unconsolidated sand were made. Here, the
                      plausibility of the phase of the electrical resistivity was
                      improved for frequencies up to 1 kHz, but errors remained
                      for higher frequencies due to the approximate nature of the
                      electrode impedance estimates and some remaining unknown
                      parasitic capacitances that led to current leakage. It was
                      concluded that the proposed correction procedure for SIP
                      measurements improved the accuracy of the phase measurements
                      by an order of magnitude in the kHz frequency range. Further
                      improvement of this accuracy requires a method to accurately
                      estimate parasitic capacitances in situ.},
      cin          = {IBG-3 / ZEA-2},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IBG-3-20101118 / I:(DE-Juel1)ZEA-2-20090406},
      pnm          = {255 - Terrestrial Systems: From Observation to Prediction
                      (POF3-255)},
      pid          = {G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000390731900045},
      doi          = {10.1016/j.jappgeo.2015.11.008},
      url          = {https://juser.fz-juelich.de/record/824736},
}