Dramatically Improved Hydrocarbons Analysis Using GC-MS with Cold EI

Aviv Amirav, Chemistry , Tel Aviv University, Tel Aviv, Israel (amirav@tau.ac.il)
Benny Neumark , Chemistry , Tel Aviv University, Tel Aviv, Israel
Oneg Elkabets, Chemistry , Tel Aviv University, Tel Aviv, Israel
Alex Yakovchuk, Chemistry , Tel Aviv University, Tel Aviv, Israel

GC-MS with Cold EI is based on interfacing a gas chromatograph (GC) and a mass spectrometer (MS) with a supersonic molecular beam (SMB), along with electron ionization of vibrationally cold sample compounds in the SMB in a contact-free fly-through ion source (hence the name Cold EI). Cold EI improves all the central GC-MS performance aspects including; the provision of enhanced molecular ions, highly improved compounds identification, significantly extended range of compounds that are amenable for analysis, much faster analysis, lower limits of detection, improved selectivity and uniform response.          

Cold EI is the best mass spectrometry technology for hydrocarbons analysis, and it was applied and serves in a wide range of hydrocarbons-related applications, including:

1.       Dramatically improved hydrocarbons mixtures and fuels analysis.

2.       Isomer distribution analysis is enabled for fuels and oils properties optimization.

3.       Isomer distribution analysis of ant waxes was explored for the investigation of ants communication pathways.

4.       Arson investigations via isomer distribution analysis of samples for its source identification.

5.       Polywax 850 was analyzed with large hydrocarbons up to C86.

6.       CNC machine oil analysis for its content of heavy oils and triglycerides.

7.       Printer wax analysis for its heavy oxygenated hydrocarbons analysis.

8.       Hydrocarbons in plant extracts analysis, including in cannabis.

9.       Jet fighter engine heavy oil analysis.

10.     Biodiesel analysis for its impurities in diesel and jet fuel.  

11.      Organic geochemical applications and analyses.

12.      Pistol oil analysis on human hands for forensic investigations.

13.      Large polycyclic aromatic hydrocarbons analysis with 7-12 rings.

14.      Hydrocarbons impurities in refineries’ cooling water spills.

15.      Hydrocarbons in extraterrestrial matter.

16.      Fast up to flow injection ultra-fast fuels analysis with low eV Cold EI              

Accordingly, Cold EI sets a new standard in GC-MS and provides the best possible hydrocarbons analysis capabilities among both GC-MS and LC-MS.  

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Short Biography of Presenting Author

Aviv Amirav is a Professor of Chemistry at Tel Aviv University and the director of Aviv Analytical..My research is on analytical instrument development with focus on GC-MS with Cold EI and its application as the best GC-MS technology. We also perform challenging applications analyses at Aviv Analytical. Please write me for questions at amirav@tau.ac.il