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Updated: Sep 5, 2026

On-chip Isotachophoresis for Separation of Ions and Purification of Nucleic Acids
Published on: March 2, 2012
A torrent intercepts the ionic flow in a polyelectrolyte solution II
Rentaro Kanamori1, Shuya Watanabe1, Mohamed Hussien1
1Institute of Science and Technology, Niigata University, Niigata 950-2181, Japan. tetsu@eng.niigata-u.ac.jp.
Abstract:
Further investigation was carried out into the mechanism underlying the changes in electric resistance in an aqueous solution of poly(sodium acrylate) induced by a vigorous flow, as we had previously observed. The change in resistance increased with concentration and showed a broad peak at a NaPAA concentration of approximately 2 × 10-3 wt%, which was close to the entanglement concentration (1.2 × 10-3 wt%). The change in resistance of the NaPAA solution increased with increasing frequency and tended to reach a plateau above approximately 3 × 103 Hz. The absolute value of the change in resistance due to the flow could be quantitatively explained by the decrease in the polymer concentration.
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