Biological Sample Mass Spectrometry Without Chromatography Bottlenecks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Nanoflow liquid chromatography-tandem mass spectrometry (nLC-MS/MS) faces challenges in scaling proteomics due to the inverse correlation between comprehensive proteome coverage and throughput, with electrospray ionization (ESI) being a major bottleneck.
Innovation Solution
The method involves contacting biomolecules with surfaces to adsorb them without chromatographic separation or using short chromatographic gradients, combined with ion mobility separation and direct infusion mass spectrometry, to increase throughput significantly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If nanoflow liquid chromatography-tandem mass spectrometry (nLC-MS/MS) is used for comprehensive proteome coverage, then identification accuracy is improved, but throughput decreases
Solution Approach 1:
The patent extracts and removes the chromatography domain from the traditional nLC-MS/MS workflow. By using surfaces (e.g., particles) for sample complexity reduction instead of chromatographic separation, the method eliminates the bottleneck that limited throughput while preserving mass spectrometry-based detection capabilities for accurate protein identification.
Solution Approach 2:
The patent changes the fundamental parameter of sample preparation by transitioning from liquid-phase chromatographic separation to surface-based adsorption. This parameter change allows direct infusion of samples into the mass spectrometer, dramatically reducing analysis time and increasing throughput from tens to hundreds of samples per day while maintaining identification accuracy through surface-mediated sample complexity reduction.
2Quantity of substance
If chromatographic separation with long gradient length is used, then proteome coverage is improved, but analysis time increases
Solution Approach 1:
The patent removes the chromatographic separation step entirely from the analysis workflow. By using surfaces for sample complexity reduction, it extracts the essential function of sample preparation while eliminating the time-consuming chromatographic gradient process, reducing analysis time from hours to minutes per sample.
Solution Approach 2:
The patent performs sample complexity reduction on surfaces before mass spectrometry analysis. This preliminary action of adsorbing and concentrating biomolecules on surfaces prepares the sample in advance, enabling direct infusion into the mass spectrometer without requiring subsequent chromatographic separation, thus dramatically reducing analysis time while maintaining comprehensive proteome coverage.
3Measurement precision
If electrospray ionization (ESI) is used for mass spectrometry detection, then sensitivity is improved, but throughput is limited
Solution Approach 1:
The patent extracts ESI from being a bottleneck in the workflow. By removing chromatography and using surface-based sample preparation, the system enables direct infusion of samples into the mass spectrometer, allowing ESI to operate at full sensitivity without being rate-limited by chromatographic elution, thus increasing throughput to hundreds of samples per day.
Solution Approach 2:
The patent enables continuous operation of the mass spectrometer by eliminating the intermittent nature of chromatographic elution. Direct infusion allows continuous sample introduction and ESI detection without pauses for gradient elution, maintaining continuous useful action and maximizing instrument throughput while preserving detection sensitivity.
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 enhances throughput by several orders of magnitude without compromising identification rates, allowing for rapid analysis of large numbers of proteins in biological samples.
Implementation Method 1
contacting a plurality of biomolecules with a surface to adsorb the plurality of biomolecules on the surface
Data Source
AI summary
Described herein are methods for analyzing biological samples by liquid chromatography-tandem mass spectrometry or direct injection mass spectrometry.