Achieving a Near-Theoretical Maximum in Peak Capacity Gain for the Forensic Analysis of Ignitable Liquids Using GC×GC-TOFMS
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Instrumental Conditions
2.3. Data Processing
3. Results and Discussion
3.1. GC-TOFMS and GC×GC-TOFMS Analysis
3.2. Visual Pattern Recognition
3.3. Computerized Pattern Recognition
4. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
Abbreviations
1D | First dimension |
1D | One-dimensional |
2D | Second dimension |
2D | Two-dimensional |
3D | Three-dimensional |
ASTM | American Society of Testing and Materials |
df | Film thickness |
EIC | Extracted ion current |
Fcrit | Critical value |
GC×GC | Comprehensive two-dimensional gas chromatography |
GC-qMS | Gas chromatography–quadrupole mass spectrometry |
GC-TOFMS | Gas chromatography–time-of-flight mass spectrometry |
i.d. | Inner diameter |
k | Retention factor |
NIST | National Institute of Standards and Technology |
NSW | New South Wales |
PC-1 | First principal component |
PC-2 | Second principal component |
PC-3 | Third principal component |
PCA | Principal component analysis |
PFTBA | Perfluorotributylamine |
SPME | Solid phase microextraction |
TIC | Total ion current |
TOFMS | Time-of-flight mass spectrometry |
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Compound Class | m/z |
---|---|
Alkanes | 43, 57, 71, 85, 99 |
Cycloalkanes and alkenes | 55, 69 |
n-Alkylcyclohexanes | 82, 83 |
Aromatics (i.e., alkylbenzenes) | 91, 105, 119, 92, 106, 120, 134 |
Alkylnaphthalenes | 128, 142, 156, 170 |
Indanes | 117, 118, 131, 132 |
Alkylstyrenes | 104, 117, 118, 132, 146 |
Alkylanthracenes | 178, 192, 206 |
Alkylbiphenyls/acenaphthenes | 154, 168, 182, 196 |
Monoterpenes | 93, 136 |
Ketones | 43, 58, 72, 86 |
Alcohols | 31, 45 |
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Nizio, K.D.; Cochran, J.W.; Forbes, S.L. Achieving a Near-Theoretical Maximum in Peak Capacity Gain for the Forensic Analysis of Ignitable Liquids Using GC×GC-TOFMS. Separations 2016, 3, 26. https://doi.org/10.3390/separations3030026
Nizio KD, Cochran JW, Forbes SL. Achieving a Near-Theoretical Maximum in Peak Capacity Gain for the Forensic Analysis of Ignitable Liquids Using GC×GC-TOFMS. Separations. 2016; 3(3):26. https://doi.org/10.3390/separations3030026
Chicago/Turabian StyleNizio, Katie D., Jack W. Cochran, and Shari L. Forbes. 2016. "Achieving a Near-Theoretical Maximum in Peak Capacity Gain for the Forensic Analysis of Ignitable Liquids Using GC×GC-TOFMS" Separations 3, no. 3: 26. https://doi.org/10.3390/separations3030026