Stationary devices for determination of magnitude and polarity of electrophoretic mobility and zeta potential
US11181503B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Jun 9, 2019 |
| Grant date | Nov 23, 2021 |
| Priority date | — |
| Expiry date | Jun 5, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/1027
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Devices and methods employing stationary homodyne interferometry to aid in the determination of the magnitude and polarity of electrophoretic mobility and zeta potential of particles are provided. The devices use an optical quadrature interferometer having a sample holder loadable with an electrophoresis sample chamber that may contain sample particles undergoing electrophoresis, the optical quadrature interferometer being configured to perform optical velocimetry on the particles and to generate a quadrature signal comprising characteristics related to the speeds and directions of the particles. The quadrature signal may be used to determine the speeds and directions of particles. The speeds and directions of particles may be used, together with other information, for the determination of the magnitudes and polarities of the electrophoretic mobility and zeta potential of the particles. Constraints on vibration, light source coherence length, and measurement resolution may be relaxed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.