Vacuum Centrifugation
Vacuum Centrifugation - Related Videos
07:07
Working with Centrifuges
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2023
Source: Robert M. Rioux & Suprita Jharimune, Pennsylvania State University, University Park, PA Earth's gravitational force is capable of separating heterogeneous mixtures. However, many systems avert this type of separation owing to the length of time usually required in such cases. Centrifugation is one of the most powerful tools for the separation of heterogeneous mixtures1. It involves the application of centripetal force for sedimentation of the heavier phase, leading to separation of...
01:05
Centrifugation
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2024
Centrifugation is a separation technique based on differences in density or size. It is commonly used to separate solids from aqueous interferents. During centrifugation, the sample is placed in centrifugation tubes and spun at high angular velocity, which allows centrifugal force to act differentially on the different densities or masses of the components. After spinning, the supernatant liquid is decanted. Depending on the specific application, either the pellet or the supernatant is retained...
07:52
An Introduction to the Centrifuge
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2023
The centrifuge is an instrument used in nearly every research lab across the globe. Centrifugation is the process by which a centrifuge is used to separate components of a complex mixture. By spinning laboratory samples at very high speeds, the components of a given mixture are subjected to centrifugal force, which causes more dense particles to migrate away from the axis of rotation and lighter ones to move toward it. These particles can sediment at the bottom of the tube into what’s...
06:20
Proper Operation of Vacuum Based Equipment
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2023
Source: Robert M. Rioux, Ajay Sathe & Zhifeng Chen, Pennsylvania State University, University Park, PA Vacuum is required for a number of laboratory procedures. This is most routinely achieved in the laboratory by the use of vacuum pumps. In addition to working at low pressures, vacuum pumps can also be used to enable rapid changing of the atmospheres in a reactor or flask by evacuation and backfilling.
01:06
Centrifugal Force
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2023
Pseudo forces, or fictitious forces, appear to act on an object in motion in a rotating frame of reference with respect to an inertial reference frame. These forces are not real forces but rather mathematical constructs and are introduced to simplify calculations in a non-inertial frame while using Newton's laws of motion. Common examples of pseudo forces include centrifugal, Coriolis, and Euler forces. These forces are essential in fields such as mechanics, astrophysics, and fluid dynamics,...
FAQs
Reduced pressure lowers the solvent vapor pressure and boiling point, allowing evaporation to proceed at relatively low temperatures. This matters when samples contain heat-sensitive molecules that could be damaged by more intensive heating. The approach therefore supports concentration or drying while helping preserve material for later molecular assays, protein analysis, metabolite measurements, or mass spectrometry.
Centrifugal force spreads the liquid sample into a thin film during spinning. The increased surface exposure helps solvent evaporate more efficiently under reduced pressure, so the sample can reach a smaller volume or a dried state. This mechanism is especially valuable when only a small quantity of biological material is available for cancer research experiments.
Processing at relatively low temperatures helps limit heat-related damage to nucleic acids, proteins, metabolites, and drug-testing samples. Preserving these components can improve the usefulness of the concentrated material in downstream molecular assays and mass spectrometry. The combination of reduced pressure and centrifugal spreading provides solvent removal without relying primarily on extensive heating.
In cancer research, the technique can be applied to samples containing nucleic acids, proteins, metabolites, or materials from drug-testing experiments. Concentrating these components reduces liquid volume while retaining valuable analytes for subsequent testing. This preparation can make limited specimens more suitable for molecular assays and mass spectrometry, where the available sample may be small.
A typical workflow places the liquid specimen in a centrifugation system, applies spinning to spread the sample, and uses reduced pressure to accelerate solvent evaporation. Processing continues until the desired concentration or drying state is reached. The resulting material can then proceed to molecular assays, protein or metabolite analysis, mass spectrometry, or drug-testing evaluations.
It is particularly useful when specimens are small, valuable, or difficult to replace and require volume reduction before analysis. Researchers can prepare nucleic acids, proteins, metabolites, and drug-testing samples while avoiding extensive heating. This supports downstream molecular assays and mass spectrometry, and it can improve analyte recovery and reproducibility during preparation of limited biological material.