GC-VUV-MS Analysis for Overlapping Peaks and Isomer Identification
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Solution Overview
Problem
Existing analysis techniques, such as ultra-violet spectral data analysis, often struggle to provide sufficient information for identifying unknown species or confirming the presence of target species due to difficulties in interpreting mixed data with overlapping peaks, especially when dealing with complex mixtures or isomers.
Innovation Solution
The integration of a mass and/or ion mobility spectrometer with an ultra-violet spectrometer and an upstream chromatographic separation device to generate multi-dimensional data sets, where ultra-violet spectral data is coupled with mass and/or ion mobility spectral data, allowing for improved de-convolution and identification of analytes by leveraging orthogonal and complementary information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If ultra-violet spectral data is used for analyte identification, then structural information about functional groups is obtained, but the data becomes difficult to interpret when peaks overlap in complex mixtures
Solution Approach 1:
The patent adds a new dimension of separation by introducing ion mobility spectrometry alongside ultra-violet spectrometry. This creates a two-dimensional data space (ultra-violet spectral dimension + ion mobility dimension) that allows overlapping peaks in the ultra-violet spectrum to be resolved based on their different ion mobility characteristics, thereby reducing interpretation difficulty while maintaining information completeness
Solution Approach 2:
The patent segments the analytical process into multiple independent detection channels: ultra-violet spectral detection and ion mobility detection. Each channel provides independent information about the analyte, and the combined segmented data allows for better resolution of complex mixtures by analyzing each dimension separately and then integrating the results
2Measurement precision
If a single detection method is used, then the device complexity is low, but the ability to distinguish closely related species such as isomers is insufficient
Solution Approach 1:
The patent merges two complementary analytical techniques (ultra-violet spectrometry and ion mobility spectrometry) into a single integrated system. The ultra-violet spectrometer provides electronic transition information while the ion mobility spectrometer provides structural shape information, and their combination significantly enhances the ability to distinguish isomers and closely related species
Solution Approach 2:
The analysis instrument is designed with multi-functionality by incorporating both ultra-violet spectral detection and ion mobility detection capabilities in a single device. This universal instrument can handle a broader range of analytical challenges including isomer differentiation, complex mixture analysis, and structurally similar compound identification that would be difficult for single-function instruments
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 combination enhances the ability to distinguish closely related species, such as isomers, and provides a powerful data set for identifying and confirming analytes by integrating structural, chemical, and elemental information, reducing false positives and improving the interpretation of complex spectral data.
Implementation Method 1
a gas chromatograph (2) which separates the analyte material such that different components of the analyte material sequentially elute from the gas chromatograph according to their characteristic retention time
Implementation Method 2
ultra-violet spectral data which provides structural information about the analyte material
Implementation Method 3
ultra-violet spectral data can be difficult to interpret
Implementation Method 4
an ion source (9) which generates ions from at least a portion of the analyte material separated in the gas chromatograph (2)
Data Source
Figure 1~2
AI summary
Disclosed herein is an ion analysis instrument combining a chromatographic or other separation device for separating gaseous analyte material according to retention time with an ultra-violet ("UV") spectrometer or detector for obtaining ultra-violet spectral data of at least a portion of the analyte material separated in said chromatographic or other separation device and a mass and/or ion mobility spectrometer for obtaining mass and/or ion mobility spectral data of ions generated from at least a portion of the analyte material separated in said chromatographic or other separation device. This instrument is able to provide highly orthogonal multidimensional data sets.