What happens when zeta potential is reduced?
If the zeta potential is reduced (e.g. in high salt concentrations), there is a possibility of a “secondary minimum” being created, where a much weaker and potentially reversible adhesion between particles exists (figure 2 (b)).
What does zeta potential depend on?
The most important factor that affects zeta potential is the pH of the medium. Other factors include ionic strength, the concentration of any additives, and temperature. The significance of zeta potential is that its value can be related to the short- and long-term stability of emulsions.
What is zeta potential class 12th Chemistry?
Zeta potential is the potential difference between fixed layer(primary layer) and diffused layer(secondary layer) of colloidal particle. It is also called as electrokinetic potential. 1Thank You. CBSE > Class 12 > Chemistry.
What is zeta potential in pharmaceutics?
Zeta Potential is a scientific term for electrokinetic potential in colloidal systems. The zeta potential indicates the degree of repulsion between adjacent, similarly charged particles (the vitamins) in dispersion.
What is zeta potential in ESR?
The zeta potential is the normal, negative force that exists between red cells and pushes them apart from each other. Things that disrupt the zeta potential make it easier for the red cells to come close to each other, and therefore the cells settle faster in the tube (and the ESR goes up).
What makes the effectiveness of a zeta potential?
Zeta Potential is the “effectiveness” of the surface charge in solution Depends upon: • Fundamental “surface” sites – how many, what type • Solution conditions – temperature, pH, electrolyte concentration Useless to quote a zeta potential value without specifying suspension conditions
How is the rate of hydrolysis dependent on the zeta potential?
The rate of hydrolysis in the aqueous phase was found to be dependent on the zeta potential. This was attributed to the effect of surface charge through the phenomenon known as surface acidity. MP in the aqueous phase hydrolyzed at a rate associated with the pH of the microenvironment, not the pH of the bulk.
How is zeta potential measured in a colloidal solution?
Zeta potential measurement is a technique for determining the surface charge of nanoparticles in a colloidal solution. Nanoparticles have a charge on the surface that attracts a thin layer of counter ions to the nanoparticle surface (Stern layer). This double layer of ions travels with the nanoparticle as it diffuses throughout the solution.
What happens when the zeta potential of an emulsion is high?
In general, when the zeta potential of an emulsion is high, the repulsive forces exceed the attractive forces, resulting in a relatively stable system. It was reported by Losso et al. (2005) that the surface properties of most emulsions were associated with their half-life stability.