Ionization techniques of volatile compounds CI vs. EI
Different ionization modes were used in this study to identify unknown compounds. EI (electron impact) ionization was used at 70 eV energy level to create comparable mass spectra, therefore compound identification was done using NIST mass library. CI (chemical ionization), as a softer ionization, wa...
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| Dokumentumtípus: | Könyv része |
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2015
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| Sorozat: | Proceedings of the International Symposium on Analytical and Environmental Problems
21 |
| Kulcsszavak: | Ionizáció, Kémia |
| Online Access: | http://acta.bibl.u-szeged.hu/56011 |
| Tartalmi kivonat: | Different ionization modes were used in this study to identify unknown compounds. EI (electron impact) ionization was used at 70 eV energy level to create comparable mass spectra, therefore compound identification was done using NIST mass library. CI (chemical ionization), as a softer ionization, was used to avoid the hard fragmentation of molecules. Using CI, molecular ion can be found on the mass spectra, which molecular ion gives more information about the component. In our study lower EI energy level was used to create similar mass spectra as CI, so molecular ions were also preparated. The applied lower EI energy level warrants the undamaged molecule and can give more information about the analyzed molecule as well as CI. In untargeted analysis, it is very important to extract as much information about the component as possible to determine the molecule structure and identify it. |
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| Terjedelem/Fizikai jellemzők: | 401-405 |
| ISBN: | 978-963-306-411-5 |