Pyrazine, 2-ethyl-3-methyl-
- Formula: C7H10N2
- Molecular weight: 122.1677
- IUPAC Standard InChI: InChI=1S/C7H10N2/c1-3-7-6(2)8-4-5-9-7/h4-5H,3H2,1-2H3
- IUPAC Standard InChIKey: LNIMMWYNSBZESE-UHFFFAOYSA-N
- CAS Registry Number: 15707-23-0
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: 2-Ethyl-3-methylpyrazine; 2-Methyl-3-ethylpyrazine; Pyrazine, 3-ethyl-2-methyl
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- Information on this page:
- Other data available:
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Normal alkane RI, non-polar column, custom temperature program
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
| Column type | Capillary | Capillary | Capillary | Capillary | Capillary |
|---|---|---|---|---|---|
| Active phase | DB-5 | SLB-5MS | HP-5 | HP-1 | SE-30 |
| Column length (m) | 30. | 10. | 30. | 12. | |
| Carrier gas | Helium | He | |||
| Substrate | |||||
| Column diameter (mm) | 0.25 | 0.18 | 0.25 | 0.32 | |
| Phase thickness (μm) | 0.25 | 0.18 | 0.25 | 0.52 | |
| Program | 40 0C (5 min) 5 0C/min -> 260 0C 15 0C/min -> 280 0C (1 min) | not specified | 50C(2min) => 2C/min => 140C => 10C/min => 280C (10min) | 35C(3min) => 6C/min => 190C => 30C/min => 225C | not specified |
| I | 995. | 1001. | 1001. | 1033. | 987. |
| Reference | Yu and Zhang, 2010 | Risticevic, Carasek, et al., 2008 | Characterization of Pyrazines in Some Chinese Liquors and Their Approximate Concentrations, 2007 | Carpino, Mallia, et al., 2004 | Vinogradov, 2004 |
| Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
| Column type | Capillary | Capillary | Capillary | Capillary |
|---|---|---|---|---|
| Active phase | CP Sil 5 CB | DB-5 | SE-54 | DB-5 |
| Column length (m) | 50. | 30. | 25. | 30. |
| Carrier gas | He | He | He | |
| Substrate | ||||
| Column diameter (mm) | 0.32 | 0.32 | 0.32 | 0.32 |
| Phase thickness (μm) | 1.2 | 0.25 | 0.25 | |
| Program | 36C => 20C/min => 85C => 1C/min => 145C=3C/min => 250C(30min) | 35C(1min) => 40C/min => 60C (1min) => 6C/min => 230C | 35C(2min) => 50C/min => 60C(2min) => 4C/min => 230C | 35C => 40C/min => 50C(2min) => 4C/min => 240C |
| I | 983. | 1008. | 1002. | 999. |
| Reference | Counet, Callemien, et al., 2002 | Matsui, Guth, et al., 1998 | Zehentbauer and Grosch, 1998 | Schieberle and Grosch, 1994 |
| Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
References
Go To: Top, Normal alkane RI, non-polar column, custom temperature program, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Yu and Zhang, 2010
Yu, A.-N.; Zhang, A.-D.,
The effect of pH on the total formation of aroma compounds produced by hearting a model system containing L-ascorbic acid with L-threonine/L-serine,
Food Chem., 2010, 119, 1, 214-219, https://doi.org/10.1016/j.foodchem.2009.06.026
. [all data]
Risticevic, Carasek, et al., 2008
Risticevic, S.; Carasek, E.; Pawliszyn, J.,
Headspace solid-phase microextraction-gas chromatographic-time-of-flight mass spectrometric methodology for geographical origin verification of coffee,
Anal. Chim. Acta, 2008, 617, 1-2, 72-84, https://doi.org/10.1016/j.aca.2008.04.009
. [all data]
Characterization of Pyrazines in Some Chinese Liquors and Their Approximate Concentrations, 2007
Characterization of Pyrazines in Some Chinese Liquors; Their Approximate Concentrations,
W. Fan; Y. Xu; Y. Zhang,
J. Agric. Food Chem., 2007, 55, 9956-9962. [all data]
Carpino, Mallia, et al., 2004
Carpino, S.; Mallia, S.; Licitra, G.; van Soest, P.J.; Acree, T.E.,
Aroma compounds of some Hyblean pasture species,
Flavour Fragr. J., 2004, 19, 4, 293-297, https://doi.org/10.1002/ffj.1346
. [all data]
Vinogradov, 2004
Vinogradov, B.A.,
Production, composition, properties and application of essential oils, 2004, retrieved from http://viness.narod.ru. [all data]
Counet, Callemien, et al., 2002
Counet, C.; Callemien, D.; Ouwerx, C.; Collin, S.,
Use of gas chromatography-olfactometry to identify key odorant compounds in dark chocolate. Comparison of samples before and after conching,
J. Agric. Food Chem., 2002, 50, 8, 2385-2391, https://doi.org/10.1021/jf0114177
. [all data]
Matsui, Guth, et al., 1998
Matsui, T.; Guth, H.; Grosch, W.,
A comparative study of potent odorants in peanut, hazelnut, and pumpkin seed oils on the basis of aroma extract dilution analysis (AEDA) and gas chromatography-olfactometry of headspace samples (GCOH),
Lipid - Fett, 1998, 100, 2, 51-56, https://doi.org/10.1002/(SICI)1521-4133(199802)100:2<51::AID-LIPI51>3.0.CO;2-W
. [all data]
Zehentbauer and Grosch, 1998
Zehentbauer, G.; Grosch, W.,
Crust aroma of baguettes. I. Key odorants of baguettes prepared in two different ways,
J. Cereal Science, 1998, 28, 1, 81-92, https://doi.org/10.1006/jcrs.1998.0184
. [all data]
Schieberle and Grosch, 1994
Schieberle, P.; Grosch, W.,
Potent odorants of rye bread crust - differences from the crumb and from wheat bread crust,
Z. Lebensm. Unters. Forsch., 1994, 198, 4, 292-296, https://doi.org/10.1007/BF01193177
. [all data]
Notes
Go To: Top, Normal alkane RI, non-polar column, custom temperature program, References
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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