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Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy
Published on: April 27, 2016
Resin characterization by electro-acoustic measurements.
Egbert Müller1, Christian Mann
1Tosoh Bioscience GmbH, Zettachring 6, 70567 Stuttgart, Germany. egbert.mueller@tosohbioscience.com
Journal of Chromatography. A
|December 30, 2006
Summary
Electro-acoustic effects like colloidal vibration current (CVI) offer rapid characterization of biochromatography resins. CVI measurements reveal insights into resin properties and protein adsorption, crucial for optimizing separation processes.
Area of Science:
- Physical Chemistry
- Colloid Science
- Materials Science
Background:
- Electro-acoustic effects, including ion vibration potential (IVP) and colloidal vibration current (CVI), arise from ion charge separation induced by ultrasonic waves.
- These phenomena, first described by P. Debye, are measurable using commercially available instruments for liquid systems.
Purpose of the Study:
- To demonstrate the application of electro-acoustic techniques for characterizing biochromatography resins.
- To investigate the influence of resin properties and surface modifications on CVI measurements.
- To assess the utility of CVI for detecting changes in resins, including protein adsorption.
Main Methods:
- Utilized commercial instruments to measure electro-acoustic effects (specifically CVI) in various biochromatography resins.
- Investigated the impact of particle size distribution, volume fraction, and density on CVI.
- Analyzed the effect of surface modifications and polymeric coatings on CVI values.
- Studied the CVI response to varying protein adsorption levels (native and denatured states).
Main Results:
- CVI magnitude is significantly influenced by resin parameters such as particle size, volume fraction, and density.
- Surface modifications, particularly polymeric ones, lead to decreased CVI values.
- Higher capacity resins generally exhibit lower CVI.
- CVI measurements effectively detect small changes in resins, including the amount of adsorbed protein.
Conclusions:
- Electro-acoustic measurements provide rapid and valuable characterization of biochromatography resins.
- CVI is sensitive to resin composition, surface properties, and protein binding.
- This technique holds potential for quality control and process monitoring in chromatography.
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