Integrated FAIMS Capillary for Mass Spectrometry Ion Transmission
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Solution Overview
Problem
Prior art FAIMS devices are not highly integrated with mass spectrometers, leading to reduced ion transmission efficiency and added complexity when used in conjunction with mass spectrometry, discouraging their adoption due to the need for frequent mounting and demounting and the loss of sensitivity when not in use.
Innovation Solution
The FAIMS device is integrated into the mass spectrometer, allowing for improved ion transmission efficiency and the ability to be used without demounting, featuring a capillary-like device with apertured conducting electrodes and FAIMS electrodes along the interior walls, enabling asymmetric waveform application for FAIMS separations or neutral potential operation for non-separation modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If FAIMS device is integrated into mass spectrometer, then ion transmission efficiency is improved and operation is simplified, but device complexity increases
Solution Approach 1:
The FAIMS device is integrated directly into the mass spectrometer system, combining two previously separate instruments into one unified platform. This merging eliminates the need for separate mounting and demounting of FAIMS devices, maintains ion transmission efficiency, and simplifies operational procedures while the internal complexity is managed through unified system design.
2Measurement precision
If FAIMS device is used with mass spectrometer, then ion separation capability is improved, but ease of operation deteriorates due to frequent mounting and demounting
Solution Approach 1:
By integrating the FAIMS device permanently into the mass spectrometer, the system eliminates the repetitive mounting and demounting operations. Users can switch between FAIMS and non-FAIMS modes through software control without physical reconfiguration, maintaining high ion separation capability while dramatically improving ease of operation.
Solution Approach 2:
The integrated system allows dynamic switching between FAIMS and non-FAIMS operational modes through electronic control of the FAIMS electrodes. This enables the system to adapt its functionality based on analytical requirements without requiring physical reconfiguration, making operation as simple as changing instrument modes.
3Device complexity
If FAIMS device is demounted when not in use, then device complexity is reduced, but loss of time occurs due to frequent mounting and demounting
Solution Approach 1:
The permanent integration of FAIMS into the mass spectrometer eliminates the need for mounting and demounting operations entirely. The system maintains a compact, unified structure that occupies minimal space while providing both FAIMS and non-FAIMS capabilities, completely eliminating time loss associated with frequent reconfiguration.
Solution Approach 2:
The integrated system provides universal functionality by combining both FAIMS and non-FAIMS operational modes within a single instrument. This multi-functionality allows the system to adapt to different analytical requirements without requiring separate devices or repeated installation/removal cycles, saving significant time while maintaining simplicity.
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
This integration enhances ion transmission efficiency and simplifies operation by allowing the FAIMS device to be used without demounting, maintaining sensitivity and reducing complexity, thus encouraging its use in combination with mass spectrometry.
Implementation Method 1
field asymmetric ion mobility spectrometry (FAIMS)...measuring the difference in the mobility of an ion at high field strength relative to its mobility at low field strength
Implementation Method 2
mass analysis of the ions to separate the ions from one another according to ion mass...In a magnetic field, the curvature of the path will be indicative of the momentum-to-charge ratio of the ion
Implementation Method 3
In an electrostatic field, the curvature of the path will be indicative of the energy-to-charge ratio of the ion
Implementation Method 4
ions may be formed by electron ionization (EI) or chemical ionization (CI) of the gas phase sample molecules
Data Source
AI summary
In a system for analyzing samples by mass spectrometry, analyte ions are analyzed first by field asymmetric ion mobility spectrometry (FAIMS) before being analyzed by a mass analyzer. The analyte ions are produced in an ion source operating at near atmospheric pressure and transferred via a dielectric capillary into the vacuum system of the mass analyzer. While passing through the capillary, the ions are analyzed by FAIMS via electrodes on the interior wall of the capillary.