Quadrupole Mass Spectrometer Spatial Detection Deconvolution
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Solution Overview
Problem
Conventional quadrupole mass spectrometers face a trade-off between mass resolving power and sensitivity, where improving resolving power leads to a loss in signal-to-noise ratio, limiting the detection of stable masses.
Innovation Solution
The method involves applying oscillatory and resolving DC voltages to a multipole mass spectrometer to selectively transmit ions within a specific range of mass-to-charge ratios, acquiring spatial distribution data at multiple time points, and deconvolving the data to produce a mass spectrum while compressing the dynamic range of intensity values, allowing for enhanced mass resolving power without sensitivity loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the mass stability limits are narrowed to improve mass resolving power, then the mass resolving power is enhanced, but the sensitivity is reduced
Solution Approach 1:
The patent transitions from conventional single-point detection to two-dimensional spatial detection. By recording ion positions across a detector plane rather than at a single point, the system captures spatial distribution information that enables deconvolution of overlapping mass signals, thereby improving mass resolving power without sacrificing sensitivity.
Solution Approach 2:
The patent segments the ion beam spatially by detecting ion positions at multiple locations across the detector plane. This spatial segmentation allows the system to resolve overlapping mass signals by analyzing their distinct spatial distributions, achieving enhanced mass resolving power while maintaining sensitivity through comprehensive spatial sampling.
2Measurement precision
If the mass stability limits are narrowed to improve mass resolving power, then the mass resolving power is enhanced, but the signal-to-noise ratio is reduced
Solution Approach 1:
The patent adds a spatial dimension to the detection process by recording ion positions across a two-dimensional detector plane. This enables the system to distinguish signal from noise through spatial pattern recognition and deconvolution algorithms, improving mass resolving power while maintaining an adequate signal-to-noise ratio through statistical analysis of spatial distributions.
Solution Approach 2:
The patent creates multiple copies of the ion signal by detecting ions at multiple spatial positions simultaneously. These spatial copies provide redundant information that can be processed through deconvolution to enhance mass resolving power while the aggregated signal across multiple positions maintains the signal-to-noise ratio.
3Quantity of substance
If spatial and temporal detection is implemented to improve mass resolving power and sensitivity, then the data processing complexity increases
Solution Approach 1:
The patent implements spatial and temporal detection to capture two-dimensional spatial distributions at multiple time points. While this generates complex datasets, the use of deconvolution algorithms and computational methods efficiently processes this multi-dimensional data, transforming the complexity into enhanced analytical capability for determining mass-to-charge ratios and relative abundances.
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 improved mass resolving power and sensitivity by effectively processing the spatial and temporal data to enhance the signal-to-noise ratio, allowing for more accurate determination of mass-to-charge ratios and relative abundance of ions.
Implementation Method 1
applying oscillatory and resolving DC voltages to electrodes of the multipole to cause the multipole to selectively transmit to its distal end ions within a range of mass-to-charge ratios
Implementation Method 2
desired electrical fields are set-up to stabilize the motion of predetermined ions in the x and y dimensions
Data Source
AI summary
A method for analyzing a sample by mass spectrometry includes producing ions from the sample, delivering the ions to an entrance of a multipole, and applying oscillatory and resolving DC voltages to electrodes of the multipole. The oscillatory and resolving DC voltages cause the multipole to selectively transmit to its distal end ions within a range of mass-to-charge ratios (m/z's) determined by the amplitudes of the oscillatory and resolving DC voltages. The method further includes acquiring data representative of the spatial distributions of ions transmitted by the multipole at a plurality of consecutive time points, and deconvolving the acquired data to produce a mass spectrum. Deconvolving the acquired data includes processing the data to compress a dynamic range of intensity values in the data.