17O quantitative nuclear magnetic resonance spectroscopy of gasoline and oxygenated additives
Lonnon, DG; Hook, JM
HERO ID
52453
Reference Type
Journal Article
Year
2003
Language
English
PMID
| HERO ID | 52453 |
|---|---|
| In Press | No |
| Year | 2003 |
| Title | 17O quantitative nuclear magnetic resonance spectroscopy of gasoline and oxygenated additives |
| Authors | Lonnon, DG; Hook, JM |
| Journal | Analytical Chemistry |
| Volume | 75 |
| Issue | 17 |
| Page Numbers | 4659-4666 |
| Abstract | SUP17O Nuclear magnetic resonance (NMR) spectroscopy allows exclusive detection and direct quantification of oxygenates in gasoline unaffected by its hydrocarbon content, using the internal standard quantitative NMR (QNMR) method. Chemical shifts of 24 oxygen-containing compounds as potential additives and contaminants have been measured in gasoline and corrected values of deltaSUBO 18.1 and 3.9 determined for neat methyl tert-butyl ether (MTBE) and neat di-n-butyl ether, respectively. Quantification of ethanol in gasoline can be readily achieved by SUP17O QNMR with dimethyl sulfone as an internal standard reference material, at the levels currently used in retail gasolines (1-20%). In addition, the simultaneous detection and quantification of the oxygenates methanol, ethanol, 2-propanol, tert-butyl alcohol, and MTBE in gasoline has been established to further demonstrate the specificity of the method. SUP17O NMR has distinct advantages over SUP1H and SUP13C QNMR methods, and although it cannot reliably differentiate 1-propanol, 1-butanol, 1-pentanol, and isopentyl alcohol, SUP17O NMR does allow the rapid and unambiguous identification of unexpected oxygenates such as acetates and ketones found as contaminants in some retail gasoline. |
| Pmid | 14632077 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | ECRIB. 17 in 17O is a superscript. |
| Is Public | Yes |
| Language Text | English |
| Is Qa | No |
| Relationship(s) |
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