rate separation
Quick Summary
Rate separation in chemistry relies on differences in the kinetic properties of mixture components, such as their migration or diffusion velocities. This contrasts with equilibrium separations, which focus on how substances distribute between two immiscible phases.12
Methods based on rate phenomena include:
* Barrier separations: These utilize semipermeable membranes. Examples include membrane filtration, ultrafiltration (accelerated by pressure), and electrodialysis (accelerated by an electric field). Osmosis and reverse osmosis also fall under this category, dealing with solvent migration across membranes.3
* Field separations: These involve applying external fields. Examples include electrophoresis, where charged particles move in an electric field, and ultracentrifugation.1
The effectiveness of rate separations depends on factors like molecular size, electrical charge, and experimental conditions, and the extent of separation is often time-dependent.1
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- separation and purificationSeparations based on rates
Rate separation processes are based on differences in the kinetic properties of the components of a mixture, such as the velocity of migration in a medium or of diffusion through semipermeable barriers.
Read MoreRate separation processes are based on differences in the kinetic properties of the components of a mixture, such as the velocity of migration in a medium or of diffusion through semipermeable barriers.
Read More - separation and purificationRate separations
Electrophoresis, described in an earlier section of this article, is an important method in the separation of biopolymers—namely, deoxyribonucleic acid (DNA) molecules and proteins. Electrophoresis is conventionally conducted on plates or slabs as in thin-layer
Read MoreElectrophoresis, described in an earlier section of this article, is an important method in the separation of biopolymers—namely, deoxyribonucleic acid (DNA) molecules and proteins. Electrophoresis is conventionally conducted on plates or slabs as in thin-layer
Read More