Centrifuges - Analytical ultracentrifuge AUC
Analytical ultracentrifuges (AUC) are used to characterize proteins and macromolecules. They enable precise molecular analyses using optical detection in a vacuum.
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Centrifuges - Analytical ultracentrifuge AUC
Analytical ultracentrifuges (AUC) are used to characterize proteins and macromolecules. They enable precise molecular analyses using optical detection in a vacuum.
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Blanc-Labo SA
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Milian SA
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Guide and selection support
Analytical ultracentrifuges are employed to determine properties such as molecular mass, size distribution, and thermodynamic parameters of biomolecules and nanoparticles. They are essential tools in research and development for molecular analysis of heterogeneous mixtures.
When selecting analytical ultracentrifuges, factors like measurement principle, type of rotor and sample cells used, as well as the optical detectors, are decisive. Compatibility with sample types and the required measurement accuracy must also be considered.
LabFinder provides an overview of analytical ultracentrifuges with details on operation, features, and application scenarios. This allows users and purchasers to make well-informed purchasing decisions and comparative evaluations of products.
Applications and Benefits
Analytical ultracentrifuges (AUC) are used for detailed physical-chemical characterization of proteins, macromolecules, nanoparticles, and complex mixtures. They allow for the determination of molecular masses, size distributions, and thermodynamic parameters through sedimentation and diffusometric measurements. During centrifugation in vacuum, samples are optically monitored to obtain high-resolution data on molecular structure and interactions.
Selection Criteria
Key selection factors include the type of sample cells (typically sector-shaped containers with optically transparent windows), detection principle, and the ability of the ultracentrifuge to operate in vacuum at stable speeds. Detectors are usually based on optical measurement techniques, which record species concentration through the Beer-Lambert Law. Other considerations are maximum rotor speed, capacity of the sample cells, and compatibility with the samples to be analyzed.
Variants and Measurement Principles
Analytical ultracentrifuges differ from preparative units through the integration of optical detector systems, allowing real-time analysis. The sample cells are specially designed for optical transparency and secure sample containment. Optical detection can be based on absorbance, refractive index, or other suitable methods that ensure accurate quantification of molecular concentration.
Calibration and Maintenance
Maintenance includes regular checks of rotors, seals, and vacuum chamber to ensure stable operation. Calibration of the optical detectors is necessary to guarantee precise concentration measurements. Manufacturer instructions for maintenance should be strictly followed to maintain reliable and reproducible results.
Limitations of Application
Analytical ultracentrifuges have limitations regarding maximum sample size and concentration, as well as sample matrix complexity. The equipment is designed for analytical use, with preparative separation possible only to a limited extent. Additionally, optical detectors require clear and homogeneously distributed samples for meaningful results.
Search Terms and Related Keywords
Synonyms and relevant keywords include: analytical ultracentrifuge, AUC, analytical ultracentrifuge, ultracentrifuge with optical detection, ultracentrifuge for protein analysis, molecular weight determination, macromolecule analysis, nanoparticle analysis, Beer-Lambert Law, and sector-shaped sample cells.
Also known as
Analytical AUC centrifuge
Analytical ultracentrifuge
Analytical ultracentrifuge instruments
AUC
Ultracentrifuge for macromolecule analysis
Ultracentrifuge for molecular analysis
Ultracentrifuge for nanoparticle analysis
Ultracentrifuge for protein analysis
Ultracentrifuge sector-shaped sample cell
Ultracentrifuges with optical detection
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Frequently asked questions
How does an analytical ultracentrifuge (AUC) work?
An analytical ultracentrifuge utilizes high centrifugal forces to separate sample components and optically records concentration profiles during the run. This allows determination of molecular properties such as mass and size.
What sample types can be analyzed with AUC?
Mainly proteins, macromolecules, nanoparticles, and heterogeneous mixtures whose physical properties such as sedimentation coefficients and molecular sizes are to be investigated.
What is the significance of optical detectors in AUC?
Optical detectors record quantitative signals (e.g., absorbance) along the sample during centrifugation, enabling precise concentration determination and analysis.
What should I consider when selecting an analytical ultracentrifuge?
Look for compatibility of sample cells, the type of detection, rotor speed, sample capacity, as well as the optical configuration and maintenance requirements.
What are the limitations of analytical ultracentrifugation?
The technique is not well suited for very complex or highly concentrated samples and is primarily designed for analytical purposes—preparative purification is only possible to a limited extent.
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