Zonal Rotors
Common Applications of Zonal Rotors:
- Rate-zonal centrifugation
- Density gradient separations
- Virus purification and concentration
- Lipoprotein separations
- Subcellular organelle isolation
Zonal rotors are designed for large-volume density gradient separations and enable high-capacity processing of biological samples in ultracentrifugation workflows. Unlike conventional tube-based rotors, zonal rotors can process significantly larger sample volumes while maintaining efficient particle separation within a density gradient.
Zonal centrifugation separates particles based on differences in sedimentation rate or buoyant density. These rotors are commonly used for rate-zonal centrifugation and density gradient separations involving viruses, lipoproteins, subcellular organelles, and other biological particles that require high-resolution fractionation.
Because zonal rotors combine large sample capacity with efficient gradient-based separations, they are frequently selected for preparative ultracentrifugation applications where throughput and resolution are equally important.
FAQ on Zonal Rotors
What is zonal centrifugation?
Zonal centrifugation is a separation technique in which particles migrate through a density gradient and separate based on differences in sedimentation rate or density. This method is widely used for isolating biological particles and complex sample components.
What is the difference between rate-zonal and isopycnic centrifugation?
In rate-zonal centrifugation, particles separate based primarily on sedimentation rate. In isopycnic centrifugation, particles migrate until they reach a position where their density matches that of the surrounding gradient medium. The appropriate technique depends on the separation objective and sample characteristics.
Why are zonal rotors used for large-volume separations?
Zonal rotors provide greater sample capacity than many conventional rotor formats, allowing researchers to process larger sample quantities within a single run while maintaining density gradient separation performance.
What is a zonal rotor?
A zonal rotor is an ultracentrifuge rotor designed to separate particles within a density gradient in larger sample volumes than traditional tube-based rotor formats. Zonal rotors are commonly used for preparative separations where throughput and resolution are important.
What types of samples can be processed using zonal rotors?
Zonal rotors are commonly used to separate viruses, lipoproteins, subcellular organelles, tissue homogenates and other biological particles that require gradient-based fractionation and high-capacity processing.
What applications are zonal rotors commonly used for?
Zonal rotors are commonly used for virus purification, lipoprotein separations, organelle isolation, density gradient centrifugation and large-scale biological particle fractionation. They are particularly valuable when large sample volumes must be processed efficiently.
What is rate-zonal centrifugation?
Rate-zonal centrifugation is a density gradient separation technique in which particles separate according to their sedimentation rate. Larger or denser particles move through the gradient faster than smaller particles, enabling fractionation of complex biological mixtures.
