Measuring electrophoretic mobility
US10690625B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Aug 17, 2018 |
| Grant date | Jun 23, 2020 |
| Priority date | — |
| Expiry date | Oct 11, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/513
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method to obtain electrophoretic mobility information from a dilute colloidal dispersion using electrophoretic light scattering (ELS) is disclosed. Both laser Doppler electrophoresis and phase analysis light scattering data analysis methods may be applied to a scattered light signal simultaneously. Unlike previous ELS apparatuses and methods, the disclosed apparatus and method can measure electrophoretic mobility distributions in high ionic strength media. It can detect the presence of electrochemical phenomena such as electrode polarization and electrolysis, and apply corrections to the measured electrophoretic mobility values thus providing electrophoretic mobility information about samples with greater accuracy, precision, and reliability than prior ELS implementations. Improvements to the optical configuration of the apparatus are also disclosed that increase the robustness of the apparatus. Many of the aspects of the disclosure may be applied to the measurement of electrophoretic mobilities of particles in low polarity media and also particles with low surface charge in polar or non-polar media with greater accuracy, precision, and reliability than prior ELS i…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.