Sealed Magic Angle Spinning NMR Probe for Hazardous Sample Containment
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Solution Overview
Problem
Conventional Magic Angle Spinning (MAS) NMR probes have open designs that cannot securely contain hazardous samples, such as radioactive materials, during analysis, leading to potential contamination and dispersal of sample particulates under high gas flow conditions, which compromises both safety and NMR instrument performance.
Innovation Solution
A sealed MAS NMR probe with a magnetically shielded, double containment system comprising a primary inner enclosure and a secondary outer enclosure, which allows high-pressure gas flow for sample spinning while filtering exhaust gases and preventing particulate dispersal, maintaining operational ease and high-resolution measurement capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an open design is used for MAS NMR probes, then ease of operation and accessibility are improved, but containment of hazardous samples deteriorates
Solution Approach 1:
The patent implements a nested containment structure where an inner sealed enclosure housing the stator assembly is placed within an outer sealed enclosure. This double-containment nesting approach provides robust hazardous sample containment while preserving operational accessibility, as the nested design allows for modular assembly and maintenance without compromising the sealed environment.
Solution Approach 2:
The probe is divided into distinct sealed compartments (inner enclosure with stator assembly, outer enclosure) that can be independently managed. This segmentation allows hazardous samples to be contained in isolated sections while maintaining overall system accessibility for operations, resolving the contradiction between ease of operation and containment reliability.
2Reliability
If sealed enclosures are implemented, then containment of hazardous samples is improved, but device complexity increases
Solution Approach 1:
The nested enclosure design consolidates containment functions into a integrated structure where the inner sealed enclosure is housed within the outer sealed enclosure. This nesting approach provides robust hazardous sample containment while managing complexity through a unified modular design that simplifies assembly and maintenance compared to separate independent containment systems.
Solution Approach 2:
The sealed enclosures serve multiple functions simultaneously: they provide hazardous sample containment, maintain controlled atmospheres for NMR measurements, and facilitate modular assembly/disassembly. This multi-functionality reduces overall device complexity by combining several requirements into unified structural elements.
3Object-generated harmful factors
If sealed enclosures with filtration are used, then prevention of particulate dispersal is improved, but gas flow resistance increases
Solution Approach 1:
Filtration systems are introduced as intermediary components within the sealed enclosures to capture particulates while allowing gas flow. These filters act as mediators between the contained hazardous atmosphere and the external environment, preventing particulate dispersal while managing gas flow resistance through strategically placed filtration elements that maintain necessary pressure differentials for NMR operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The sealed design ensures secure containment of hazardous samples, preventing contamination and maintaining NMR performance, temperature control, and sensitivity, while allowing for safe analysis of hazardous materials.
Implementation Method 1
The probe body may include or be constructed of a conducting metal that shields internal electrical circuits and components from electromagnetic radiation that can interfere with MAS NMR measurements during operation
Implementation Method 2
allowing high-pressure gases to flow into the stator assembly in the inner enclosure to suspend and spin the rotor containing the hazardous sample
Implementation Method 3
The MAS-NMR probe with the sealed inner enclosure and sealed outer enclosure provides double containment and isolation of hazardous samples from the exterior environment during analyses
Implementation Method 4
The probe simultaneously filters exhaust gases exiting from the stator assembly and out of the device, thus preventing dispersal of contaminating particles
Data Source
AI summary
A magic-angle-spinning (MAS) nuclear magnetic resonance (NMR) probe is described that includes double containment enclosures configured to seal and contain hazardous samples for analysis. The probe is of a modular design that ensures containment of hazardous samples during sample analysis while preserving spin speeds for superior NMR performance and convenience of operation.