Sulfur Speciation in Petroleum: Atmospheric Pressure Photoionization or Chemical Derivatization and Electrospray Ionization Fourier Transform Ion Cyclotron Resonance Mass Spectrometry
| Autor: | Ryan P. Rodgers, Priyanka Juyal, and Christopher L. Hendrickson, † Do-Gyun Kim, Alan G. Marshall, Jeremiah M. Purcell |
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| Rok vydání: | 2007 |
| Předmět: |
Chemical ionization
Chemistry General Chemical Engineering Electrospray ionization Analytical chemistry Energy Engineering and Power Technology Petroleomics Photoionization Mass spectrometry Fourier transform ion cyclotron resonance chemistry.chemical_compound Fuel Technology Ionization Derivatization |
| Zdroj: | Energy & Fuels. 21:2869-2874 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/ef700210q |
| Popis: | Molecular characterization of sulfur-containing species in petroleum is important because sulfur-containing compounds are detrimental to the environment and the refining processes. In a recent report, the sulfur-containing compounds in a vacuum bottom residue (VBR) were methylated to enhance their detectability by electrospray ionization (ESI) mass analysis. The most abundant sulfur compounds exhibited relatively low double bond equivalents (4 < DBE < 12). Alternatively, atmospheric pressure photoionization (APPI) mass analysis can provide molecular characterization without chemical derivatization. Here, we compare the sulfur speciation of a petroleum vacuum bottom residue by ESI and APPI with a 9.4 T Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer. Even after methylation, ions produced by APPI extend to much higher DBE than by ESI. Moreover, analysis of the saturates and aromatics fractions of underivatized VBR by APPI shows comparable ionization efficiency across a broad DBE range. ... |
| Databáze: | OpenAIRE |
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