Multichannel Isoelectric Focusing Fixtures for Parallel MS Analysis
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Solution Overview
Problem
Existing methods for analyte separation and characterization, particularly in biomedical research and clinical diagnostics, face challenges in achieving high throughput, reproducibility, and analytical performance, especially in the context of isoelectric focusing and mass spectrometry.
Innovation Solution
The development of multichannel microfluidic devices with nebulizers and membrane-containing high voltage electrode fixtures, enabling parallel isoelectric focusing reactions, electrospray ionization, and integration with mass spectrometry, along with features like hydrophilic membranes and controlled gas flow, to enhance separation and characterization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple separation channels are used for parallel processing, then productivity is improved, but device complexity increases
Solution Approach 1:
The device is divided into multiple independent separation channels (first separation channel, second separation channel, etc.) that can process different analyte mixtures simultaneously. Each channel functions as an independent unit with its own inlet, separation medium, and detection interface, enabling parallel processing while maintaining modular simplicity.
Solution Approach 2:
The device employs a universal detection system (mass spectrometer with electrospray ionization interface) that serves all separation channels. The common outlet region and shared mass spectrometer allow multiple channels to be monitored through a single detection interface, reducing overall system complexity while maintaining high throughput.
2Measurement precision
If isoelectric focusing is used for separation, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The device replaces complex mechanical separation systems with an electric field-based isoelectric focusing mechanism. By applying voltage across the separation channels, analytes are separated based on their isoelectric points without requiring moving parts or complex mechanical structures, thereby achieving high precision separation with minimal device complexity.
Solution Approach 2:
The device utilizes changes in electric field parameters (voltage application) to achieve separation. By controlling the voltage applied across the separation medium, analytes migrate to their isoelectric points and form focused bands, enabling precise separation through simple parameter control rather than complex mechanical or chemical systems.
3Measurement precision
If electrospray ionization is used for mass spectrometry, then measurement precision is improved, but reliability decreases
Solution Approach 1:
The device maintains continuous flow from the separation channels through the common outlet region into the mass spectrometer. The electrospray ionization interface continuously receives separated analytes and converts them to gas-phase ions without interruption, ensuring stable and reproducible mass spectrometry measurements while maintaining high precision characterization.
Solution Approach 2:
The device introduces a mobilizer channel that acts as an intermediary between the separation channels and the mass spectrometer. This channel delivers a mobilization buffer that promotes stable electrospray formation and continuous analyte delivery, thereby improving the reliability and reproducibility of the ionization process while maintaining measurement precision.
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
Improves convenience, reproducibility, and analytical performance of analyte separation and characterization, facilitating high-throughput processing and accurate determination of isoelectric points for analytes.
Implementation Method 1
a nebulizer, wherein the nebulizer is configured to surround at least part of the fluidic device on at least two sides
Implementation Method 2
mobilization and electrospray ionization of the separated analytes for characterization by mass spectrometry
Implementation Method 3
separation and characterization of analytes in a mixture of analytes, and more specifically to multichannel devices for performing multiple isoelectric focusing reactions in parallel
Data Source
AI summary
Methods, devices, and systems for performing isoelectric focusing reactions are described. The systems or devices disclosed herein may comprise fixtures that have a membrane. In some instances, the disclosed devices may be designed to perform isoelectric focusing or other separation reactions followed by further characterization of the separated analytes using mass spectrometry. Two or more isoelectric focusing reactions may be performed in parallel. The disclosed methods, devices, and systems provide for fast, accurate separation and characterization of protein analyte mixtures or other biological molecules by isoelectric point.