Key facts
- Brand
- Agilent
- Model
- 7020 ZetaProbe
- Category
- Other Electronics
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-07-02
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Agilent 7020 ZetaProbe Application Note for Controlling Suspension Stability
The document discusses the importance of controlling aggregation or dispersion in colloidal suspensions, noting that subtle changes in chemical composition can alter these states. It highlights that zeta potential is a critical parameter for determining repulsive forces between particles and maintaining stability.
The Agilent 7020 ZetaProbe is presented as an ideal tool for this purpose because it measures zeta potential directly without requiring sample dilution, which traditional optical methods often necessitate. The note provides examples of using the device to determine optimal pH ranges for stability and to monitor the dosage of dispersants.
Agilent 7020 ZetaProbe specifications
| Minimum solids concentration for measurement | about 0.5% solids |
|---|---|
| Maximum volume percentage for emulsions | 60% |
| Required zeta potential for stable dispersion | at least 25 mV |
Source: Agilent 7020 ZetaProbe Application Note for Controlling Suspension Stability
All Agilent 7020 ZetaProbe documents by type
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
Why is sample dilution problematic for measuring zeta potential?
Dilution takes time and often changes the zeta potential, whereas the ZetaProbe can measure it directly in concentrated suspensions.
From: Agilent 7020 ZetaProbe Application Note for Controlling Suspension Stability
How does the ZetaProbe estimate particle size?
It uses a patented multifrequency electroacoustic technique to make an adequate estimate of the effective size.
From: Agilent 7020 ZetaProbe Application Note for Controlling Suspension Stability
What is the Agilent 7020 ZetaProbe used for in titania manufacturing?
It is used to monitor the type and integrity of surface coatings on titania particles to detect batch-to-batch variability.
From: Agilent 7020 ZetaProbe Titania Coating QC Application Note
How quickly can the ZetaProbe determine the isoelectric point?
The instrument can determine the isoelectric point to better than 0.1 pH units in under half an hour.
From: Agilent 7020 ZetaProbe Titania Coating QC Application Note