All-Ions Fragmentation Mass Spectra Decomposition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mass spectrometry techniques face challenges in automatically identifying correlations between product ions and precursor ions in all-ions tandem mass spectral data, particularly in LC/MS/MS analyses without a precursor ion selection step, leading to complex data analysis and reduced efficiency.
Innovation Solution
The development of novel mass spectral analysis methods that employ multiple approaches to extract single-component fragmentation spectra from multiplexed product-ion spectra, allowing for the identification of precursor ions without the need for alternate precursor-ion scans, and utilizing techniques like neutral loss analysis and cross-correlation calculations to correlate precursor and product ions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If all-ions fragmentation is performed without precursor ion selection, then analysis speed and throughput are improved, but data complexity and difficulty of identifying precursor-product correlations increase
Solution Approach 1:
The patent segments the complex multiplexed product-ion spectra into individual single-component fragmentation spectra by detecting peak shapes in extracted ion chromatograms. This segmentation allows identification of precursor-product correlations without requiring precursor ion selection, thus maintaining high throughput while reducing data complexity through systematic decomposition of the spectral data.
Solution Approach 2:
The patent employs feedback mechanisms by using detected peak shape information from extracted ion chromatograms to iteratively identify and correlate precursor and product ions. The system uses the detected correlations to refine the decomposition process, creating a feedback loop that progressively reduces data complexity while maintaining accurate identification of ion relationships.
2Ease of operation
If traditional precursor ion selection is used, then correlation identification is simplified, but analysis time and productivity decrease
Solution Approach 1:
The patent enables the system to self-identify precursor-product correlations by analyzing peak shapes in extracted ion chromatograms from all-ions fragmentation data. Instead of requiring operator intervention to select precursor ions, the system automatically detects correlations through mathematical analysis of the spectral data, thus simplifying the process while maintaining high productivity.
Solution Approach 2:
The patent replaces the mechanical precursor ion selection process with a computational approach using cross-correlation calculations and peak shape analysis. This substitution eliminates the need for sequential precursor selection steps, thereby reducing analysis time while maintaining or improving correlation identification accuracy through automated computational methods.
3Loss of information
If multiplexed product-ion spectra are analyzed directly, then computational resources are consumed, but detailed peak shape information is lost
Solution Approach 1:
The patent performs preliminary decomposition of multiplexed spectra into single-component fragmentation spectra by detecting peak shapes before conducting detailed correlation analysis. This preliminary action extracts and preserves detailed peak shape information in an organized format, reducing the computational burden of subsequent analysis while maintaining all relevant spectral details.
Solution Approach 2:
The patent extracts peak shape information from multiplexed product-ion spectra by analyzing extracted ion chromatograms and isolating individual fragmentation patterns. This extraction process separates the detailed peak shape information from the complex multiplexed data, preserving it for accurate correlation identification while reducing the overall computational complexity of the analysis.
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
A method for tandem mass spectrometry of a plurality of eluting compounds comprises: (a) performing, during a time period, the steps of: ionizing the plurality of eluting compounds to generate a plurality of precursor ion species; introducing the plurality of precursor ions into a fragmentation cell operated at constant fragmentation energy so as to generate a plurality of product-ion species from at least a portion of the precursor ion species; and generating a mass spectrum of the plurality of product-ion species; and (b) recognizing matches between certain of the product ion species generated during the time period based on correlations between elution profiles of the product ion species.