Maintenance of colloid stability

After preparation of the dispersion, one should ensure the presence of enough repulsive energy to prevent aggregation of the particles and their rejoining. The 

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For maintenance of colloid stability over a long period of time (i.e. 2-3 yeeus), one needs to ensure the following conditions High zeta potential by ensuring adequate coverage of the particles or droplets by ionic surfactant low electrolyte concentration low valency of the electrolyte (multivalent ions should be avoided). 

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