Open AccessContinuous monitoring of conductivity using a uniform magnetic field
Author(s) -
J. Rojas-Diaz,
C. J. Felice,
Gonzalo Ruiz
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1272/1/012022
Subject(s) - electromagnetic coil , conductivity , admittance , electrical impedance , magnetic field , polarization (electrochemistry) , materials science , electrode , computational physics , electrical resistivity and conductivity , acoustics , analytical chemistry (journal) , nuclear magnetic resonance , physics , chemistry , electrical engineering , engineering , chromatography , quantum mechanics
A spherical coil was used to measure a broad range of conductivities of solutions of NaCl in water. The method proposed in this paperrelates the conductivity of the sample with the frequency at the minimum value of an imaginary admittance spectrum when the coil is immersed in the solution. There is a high correlation between the experimental results and the fit equation (r = 0.95). Since the proposed method is an inductive one, the drawbacks of electrode methods are avoided, e.g. the interface polarization impedance. The method presented is fast, does not require an estimate for the Q factor and the measurements do not depend on the sample volume when the coil is completely immersed. This system is capable of continuous monitoring of biological and inorganic samples.