Determination of polycyclic aromatic hydrocarbons in solvent-refined coal by negative chemical ionization-charge inversion mass spectrometry/mass spectrometry

Autor:	R. G. Cooks, J.D. Ciupek, D. Zakett
Rok vydání:	1981
Předmět:	Detection limit Chemical ionization Fragmentation (mass spectrometry) Chemistry Mass spectrum Analytical chemistry Refined coal Mass spectrometry Electron ionization Analytical Chemistry Ion
Zdroj:	Analytical Chemistry. 53:723-726
ISSN:	1520-6882 0003-2700
Popis:	The unique value of charge inversion reactions in mass spectroscopy/mass spectroscopy (MS/MS) for direct characterization of polycyclic aromatic hydrocarbons in untreated solvent-refined coal is demonstrated. The positive ion MS/MS spectra of polycyclic aromatic hydrocarbons (PAHs) recorded for each of several molecular ions precursors, M/sup -/, M/sup +/, (M-H)/sup -/, and (M + H)/sup +/, show profiles which are distinctive and valuable in recognizing these compounds. Conventional electron impact mass spectra show a smaller number of fragmentations, including loss of C/sub 2/ moieties in high relative abundance. The striking differences between electron impact spectra and the various forms of MS/MS are being explored. These data demonstrate that a number of complementary reactions can be used as the basis for obtaining MS/MS spectra of polycyclic aromatics. Individual transitions in these spectra can be used to quantify PAHs in intact coal liquids. The detection limits and optimum analysis method for a series of PAHs commonly found in SRC-II at parts-per-million levels are currently being evaluated.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::95b00e0be6f277da7391363a2f17ef3e https://doi.org/10.1021/ac00227a037 Zobrazit plný text záznamu