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Suspension stability vs. zeta potential. Reproduced with permission from reference [76].
| Assessment of Stability | Zeta Potential (mV) |
|---|---|
| Flocculation of coagulation | 0 to +/−5 |
| Incipient instability | +/−10 to +/−30 |
| Moderate stability | +/−30 to +/−40 |
| Good stability | +/−40 to +/−60 |
| Excellent stability | Greater than +/−60 |
