MS - Sector Mass spectrometer
Sector mass spectrometers separate ions by deflection in electric and magnetic fields to precisely determine masses. They offer high resolution and advanced focusing techniques.
MS - Sector Mass spectrometer
Sector mass spectrometers separate ions by deflection in electric and magnetic fields to precisely determine masses. They offer high resolution and advanced focusing techniques.
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Guide and selection support
Sector mass spectrometers are used in analytical chemistry to determine the mass of ions with high precision by targeted deflection in combined electric and magnetic fields. They are particularly advantageous where high mass resolution and precise mass-to-charge determination are required.
Key selection criteria include resolution, type of focusing (velocity and directional focusing), signal intensity, and the complexity of instrument operation. Calibration requirements and maintenance demands are also important factors when choosing such equipment.
LabFinder provides a targeted overview of sector mass spectrometers, enabling you to quickly grasp the available technical variants and align procurement precisely with your requirements.
Applications and Benefits
Sector mass spectrometers are used for precise mass analysis of ionized particles. They are especially suited for investigations that require high resolution and accurate mass determination, such as in geochemistry, environmental analysis, materials testing, and research. By deflecting ions in magnetic and electric fields, mass ratios can be determined with great accuracy.
Selection Criteria
When choosing a sector mass spectrometer, the type of focusing (velocity and directional focusing) is critical for resolution and signal quality. Double focusing improves precision while maintaining acceptable signal intensity. Ease of use, calibration effort, and maintenance requirements are also important factors. The complexity of measurement tasks and required mass range further determine the appropriate instrument configuration.
Variants and Measurement Principles
Sector mass spectrometers use the deflection of ions in electric and magnetic fields to determine mass-to-charge ratios. The ions are guided on circular paths with radii dependent on energy and momentum. Variants differ by their focusing methods: velocity focusing corrects for differences in ion speed, directional focusing compensates for angled trajectories, and double-focusing instruments combine both effects to optimize resolution and sensitivity.
Calibration and Maintenance
Regular calibration is necessary to ensure accuracy in mass determination, typically using reference substances with known masses. Maintenance primarily involves checking and adjusting electric and magnetic fields, as well as cleaning ion optics and detectors to ensure long-term performance.
Limitations in Application
Sector mass spectrometers have a complex design and are often less flexible than other MS types, especially for the analysis of highly variably accelerated ions or rapid analysis cycles. The operation and instrument setup are more demanding, so their use is particularly suitable for demanding, high-resolution analytical questions.
Search Terms and Related Terms
Synonyms and related terms include sector field MS, magnetic sector mass spectrometer, electric field mass spectrometer, double-focusing mass spectrometer, velocity focusing, directional focusing, high-resolution mass spectrometer, ion separation, mass-to-charge ratio. These terms assist in finding suitable devices within analytical mass spectrometry.
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Frequently asked questions
How does a sector mass spectrometer work?
In a sector mass spectrometer, ions are deflected by electric and magnetic fields, with their trajectory depending on their energy and momentum. By measuring the radius of deflection, the mass-to-charge ratio can be determined.
What focusing types are used in sector mass spectrometers?
There is velocity focusing, which corrects for differences in ion velocities; directional focusing, which compensates for angled trajectories; and double-focusing systems, which combine both types of focusing.
What are important criteria for selecting a sector mass spectrometer?
Key criteria include resolution, focusing type, signal intensity, measuring range, calibration effort, maintenance requirements, and the ease of instrument operation.
For which applications are sector mass spectrometers particularly suitable?
They are suitable for analyses that require high mass resolution and precise mass-to-charge ratio determination, for example in research, environmental, and materials analysis.
What are the limitations of sector mass spectrometers in application?
Due to their complex design, they are less flexible than other MS types, require more demanding operation, and are less suitable for fast, variably accelerated ion analyses.
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