Ion Manipulation Device for Gas-Phase Reaction Analysis
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Solution Overview
Problem
Current ion mobility and mass analysis systems are limited in their ability to support gas-phase reactions prior to mobility analysis, restricting the collection of collision cross section information to reactants only and lacking versatility for pre-separation of ions by mass or mobility.
Innovation Solution
A novel ion manipulation device with a unique electrode geometry that supports variable electric fields, background gases, and pressures, featuring separately controlled regions for separation and reaction, interfaced with commercial IM-QTOF instrumentation, enabling collision-induced dissociation, electron transfer dissociation, and ion molecule reactions, followed by high-resolution IM-QTOF analyses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If commercial IM-QTOF instrumentation is used for mass analysis, then high-resolution mass-to-charge analysis is achieved, but the ability to support gas-phase reactions prior to mobility analysis is limited
Solution Approach 1:
The device is divided into multiple independently controlled regions: a first region for ion separation by mass or mobility, and a second region for gas-phase reactions. This segmentation allows each region to be optimized for its specific function while working together in a unified system, enabling both high-resolution analysis and versatile reaction capabilities.
Solution Approach 2:
The ion manipulation device is designed to perform multiple functions: quadrupole mass selection, ion mobility selection, trapping for ETD or IMR, full transmission for CID, and interfacing with IM-QTOF. This multi-functionality allows a single device to replace multiple separate instruments, achieving both precision measurement and adaptability.
2Measurement precision
If collision-induced dissociation is performed post-mobility, then mass analysis is achieved, but collision cross section information is collected only on reactants not products
Solution Approach 1:
The device performs ion separation by mass or mobility in the first region before ions enter the second region for gas-phase reactions. This preliminary separation ensures that only selected ions undergo reactions, and the subsequent mobility analysis in the second region captures collision cross section information on the reaction products, not just reactants.
Solution Approach 2:
The second region acts as an intermediary between the reaction zone and the detection zone. It provides a controlled environment for gas-phase reactions while maintaining ion mobility conditions, allowing collision cross section measurements on products without disrupting the reaction process or losing product information.
3Adaptability or versatility
If separately controlled regions are implemented for separation and reaction, then versatility for pre-separation and reaction is enhanced, but device complexity increases
Solution Approach 1:
The device merges multiple functions into a single integrated platform: quadrupole mass filter, ion mobility separator, reaction chamber, and TOF analyzer all within one device. This consolidation reduces the need for multiple separate instruments and simplifies the overall system architecture while maintaining versatility.
Solution Approach 2:
The device employs dynamic control of electric fields and potentials in different regions to achieve different operating modes. By dynamically adjusting voltages and field configurations, the same physical structure can perform multiple functions (separation, reaction, trapping, transmission) without requiring separate hardware for each mode, thus reducing structural complexity.
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
Facilitates high-dimensional chemical analyses by allowing pre-separation of ions, enabling the collection of collision cross section information on reaction products and supporting multiple operating modes, enhancing the versatility and resolution of ion mobility and mass analysis.
Implementation Method 1
At least one RF power source is coupled to the electrodes and configured to apply an RF potential to the electrodes to create an electric field that inhibits charged particles from approaching the counter-facing surfaces
Implementation Method 2
At least one DC power source is coupled to the electrodes and configured to apply a DC potential to affect the movement of ions between the counter-facing surfaces in a direction parallel to the counter-facing surfaces
Implementation Method 3
pre-separation of ions by either mass or mobility in the first region, followed by collision-induced dissociation (CID), electron transfer dissociation (ETD), or ion molecule reactions (IMR) in the second region
Implementation Method 4
interface to a commercial IM-QTOF for high-resolution collision cross section (CCS) and mass-to-charge (m/z) analyses
Data Source
AI summary
An ion manipulation device and systems and methods for controlling the ion manipulation device. The ion manipulation device includes a pair of counter-facing surfaces and a plurality of electrodes arranged in one or more linear array on each of the counter-facing surfaces. At least one RF power source is coupled to the electrodes and configured to apply an RF potential to the electrodes to create an electric field that inhibits charged particles from approaching the counter-facing surfaces. At least one DC power source is coupled to the electrodes and configured to apply a DC potential to affect the movement of ions between the counter-facing surfaces in a direction parallel to the counter-facing surfaces. The DC potential and the RF potential are applied to the electrodes simultaneously.