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Published on: August 18, 2017
Real-time fingerprinting of structural isomers using laser induced breakdown spectroscopy
Ashwin Kumar Myakalwar1, Siva Kumar Anubham1, Santosh Kumar Paidi2
1Advanced Centre of Research in High Energy Materials, University of Hyderabad, Prof C R Rao Road, Gachibowli, Hyderabad, Telangana 500046, India. manoj@uohyd.ac.in.
Laser-Induced Breakdown Spectroscopy (LIBS) can now differentiate structural isomers, like pyrazoles, by analyzing subtle spectral differences. This breakthrough enables more precise chemical identification in real-time applications.
Area of Science:
- Analytical Chemistry
- Spectroscopy
- Chemometrics
Background:
- Laser-Induced Breakdown Spectroscopy (LIBS) offers real-time, label-free chemical analysis, making it valuable for high-energy materials and pharmaceuticals.
- A key limitation of LIBS is its inability to distinguish between structural isomers due to nearly identical spectral outputs.
Purpose of the Study:
- To develop a sensitive and reliable method for segmenting and identifying structural isomers using LIBS.
- To investigate the underlying mechanistic principles causing spectral variations between isomers.
Main Methods:
- Utilized a suite of chemometric approaches to analyze subtle differences in LIBS spectra.
- Acquired LIBS spectra from a set of pyrazole structural isomers.
- Investigated and confirmed the statistical significance of spectral variations.
Main Results:
- Successfully exploited subtle spectral differences for isomer identification.
- Developed a sensitive and reliable segmentation method for LIBS data.
- Confirmed statistically significant variations in LIBS spectra between structural isomers.
Conclusions:
- Chemometric analysis of LIBS spectra enables the differentiation of structural isomers.
- The identified spectral variations have statistically significant mechanistic principles.
- This advancement enhances the capability of LIBS for precise chemical identification, particularly for challenging samples like isomers.
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