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Leaf Spray Mass Spectrometry: A Rapid Ambient Ionization Technique to Directly Assess Metabolites from Plant Tissues
Published on: June 21, 2018
Easy ambient sonic-spray ionization mass spectrometry combined with thin-layer chromatography
Renato Haddad1, Humberto M S Milagre, Rodrigo Ramos Catharino
1ThoMSon Mass Spectrometry Laboratory, Institute of Chemistry, State University of Campinas, 13084-971, Campinas SP, Brazil.
Analytical Chemistry
|March 12, 2008
Summary
Easy ambient sonic spray ionization mass spectrometry (EASI-MS) coupled with thin-layer chromatography (TLC) offers simple, on-spot detection and characterization of analytes. This powerful combination enhances chemical analysis across various fields.
Area of Science:
- Analytical Chemistry
- Mass Spectrometry
- Chromatography
Background:
- On-spot detection and characterization of analytes on thin-layer chromatography (TLC) plates are crucial for various analytical applications.
- Ambient ionization techniques coupled with mass spectrometry offer novel approaches for direct sample analysis.
Purpose of the Study:
- To demonstrate the efficacy of easy ambient sonic spray ionization mass spectrometry (EASI-MS) for on-spot detection and characterization of analytes separated by TLC.
- To evaluate EASI-MS as a simple, gentle, and versatile ionization technique for mass spectrometry.
Main Methods:
- Thin-layer chromatography (TLC) was employed for the separation of analytes.
- Easy ambient sonic spray ionization mass spectrometry (EASI-MS) was utilized for direct on-spot detection and characterization of separated compounds.
- EASI-MS was performed using only nitrogen (or air) assistance, without voltages, electrical discharges, UV/laser beams, or high temperatures.
Main Results:
- The TLC-EASI-MS technique successfully analyzed mixtures of semipolar nitrogenated compounds, pharmaceutical drugs, and vegetable oils.
- The method was applied to monitor a chemical reaction of synthetic importance, showcasing its utility in synthetic chemistry.
- EASI-MS proved to be the simplest and gentlest ambient ionization technique, easily implemented in various mass spectrometers.
Conclusions:
- TLC coupled with EASI-MS provides a simple, advantageous combination of chromatographic separation and sensitive on-spot mass spectrometry detection and characterization.
- The favorable characteristics of TLC-EASI-MS suggest broad applicability in drug and oil analysis, phytochemistry, synthetic chemistry, forensics, and quality control.
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