Zeta potential measurement method and measurement device
US12313590B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 30, 2023 |
| Grant date | May 27, 2025 |
| Priority date | — |
| Expiry date | Feb 9, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/60
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and a device are provided for measuring a zeta potential with reproducibility, high reliability and high accuracy, by predicting an equilibrium value from the change over time of a streaming potential. In measurement of the zeta potential of a sample surface using a streaming potential method, an external pressure is changed in a step-wise manner, and a pressure change profile is set having a rising part or a falling part which is of a shorter time than the relaxation time T required for response to a change in the streaming potential accompanying the change in external pressure, and a steady part in which pressure is held at a steady state for a time longer than the relaxation time T. An asymptotic value of the streaming potential extrapolated from the transient response of the streaming potential occurring from the pressure change profile is used to calculate the zeta potential.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.