DMS Gas Introduction Manifold for Multi-Modifier Ion Separation
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Solution Overview
Problem
Differential Mobility Spectrometers (DMS) face challenges in separating isobaric compounds and structural isomers, as existing chemical modifiers often fail to achieve baseline separation, particularly in high-throughput workflows lacking liquid chromatography, leading to compromised analytical results.
Innovation Solution
A gas introduction system and method for a DMS that includes a manifold with multiple modifier liquid supply inlets and a control system to actuate valves and pumps, allowing for sequential or simultaneous introduction of multiple modifiers to optimize ion separation by comparing subsets of ions and selecting the most effective modifier based on the introduced sample and gas flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single chemical modifier is used in DMS, then the device complexity is reduced, but the separation power is insufficient for isobaric compounds and structural isomers
Solution Approach 1:
The modifier introduction system is segmented into multiple independent channels, each capable of introducing a different chemical modifier. This segmentation allows the system to handle multiple modifiers simultaneously or sequentially, thereby achieving baseline separation of isobaric compounds and structural isomers without requiring a single complex modifier mixture.
Solution Approach 2:
The manifold is designed with multiple modifier supply inlets that can accommodate different chemical modifiers. Each inlet can be selectively activated to introduce a specific modifier, making the system universally applicable to various separation challenges involving different compound types such as isobars and structural isomers.
2Manufacturing precision
If multiple modifiers are introduced sequentially, then the separation power is enhanced, but the analysis time increases
Solution Approach 1:
The system maintains continuous gas flow through the DMS while sequentially introducing multiple modifiers. This continuous operation ensures that the analysis process does not中断, and modifiers are introduced in a streamlined manner that minimizes idle time between modifications, thereby reducing overall analysis time while maintaining high separation power.
Solution Approach 2:
Modifiers are introduced in a periodic, controlled sequence through the multiple inlets. Each modifier is introduced for a specific duration and then replaced by the next modifier in the sequence. This periodic introduction allows the system to systematically explore different separation conditions without requiring continuous introduction of all modifiers simultaneously, thus optimizing analysis time.
3Manufacturing precision
If multiple modifiers are introduced simultaneously, then the separation power is maximized, but the control complexity increases
Solution Approach 1:
The control system is segmented into independent control modules for each modifier inlet. Each module can be independently activated or deactivated based on the separation requirements. This segmentation simplifies the overall control complexity by breaking down the simultaneous control of multiple modifiers into manageable, independent control units that can be coordinated through a central controller.
Solution Approach 2:
The system dynamically adjusts the introduction of multiple modifiers based on real-time separation performance and sample characteristics. The control system can modify the timing, duration, and combination of modifiers being introduced simultaneously, allowing for flexible optimization of separation power without being constrained by a fixed, complex control protocol.
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 approach enables baseline separation of isobaric and structural isomers by dynamically adjusting the gas flow and modifier introduction, enhancing the separation power and peak capacity of DMS, even in complex mixtures where single modifiers are insufficient, thereby improving analytical accuracy and throughput.
Implementation Method 1
Differential Mobility Spectrometers (DMS), also referred to as Field Asymmetric Waveform Ion Mobility Spectrometers (FAI-MS) or Field Ion Spectrometers (FIS), typically perform gas-phase ion sample separation and analysis by continuously transmitting ions-of-interest while filtering out unwanted species.
Implementation Method 2
a DMS can be interfaced with a mass spectrometer (MS) to take advantage of the atmospheric pressure, gas-phase, and continuous ion separation capabilities of the DMS
Data Source
AI summary
A gas introduction system for a differential mobility spectrometer (DMS) includes a manifold including a gas inlet and a gas outlet. A mixing channel fluidically couples the gas inlet to the gas outlet. A plurality of modifier liquid supply inlets is coupled to the mixing channel and a plurality of selectively operable valves. One of the plurality of selectively operable valves is coupled to one of the plurality of modifier liquid supply inlets. A control system is in communication with each of the plurality of the selectively operable valves. The control system is configured to actuate each of the plurality of selectively operable valves.