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, polar column, custom temperature program
Go To: Top, References, Notes
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-Wax | DB-Wax | HP-Innowax | HP-Innowax | TC-Wax |
| Column length (m) | 30. | 30. | 60. | 60. | |
| Carrier gas | Hydrogen | Hydrogen | Helium | Helium | |
| Substrate | |||||
| Column diameter (mm) | 0.25 | 0.25 | 0.32 | 0.32 | |
| Phase thickness (μm) | 0.25 | 0.25 | 0.25 | 0.25 | |
| Program | 44 0C 3 0C/min -> 170 0C 8 0C/min -> 250 0C | not specified | 40 0C (5 min) 4 0C/min -> 60 0C (5 min) 8 0C/min -> 250 0C (3 min) | not specified | not specified |
| I | 1406. | 1419. | 1411. | 1407. | 1410. |
| Reference | Gonzalez-Rios, Suarez-Quiroz, et al., 2007 | Gonzalez-Rios, Suarez-Quiroz, et al., 2007 | Viegas and Bassoli, 2007 | Viegas and Bassoli, 2007 | Kraft and Switt, 2005 |
| Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
| Column type | Capillary | Capillary | Capillary | Capillary | Capillary |
|---|---|---|---|---|---|
| Active phase | Innowax | TC-Wax | Carbowax 20M | FFAP | FFAP |
| Column length (m) | 30. | 30. | 25. | ||
| Carrier gas | Helium | He | He | ||
| Substrate | |||||
| Column diameter (mm) | 0.25 | 0.32 | 0.32 | ||
| Phase thickness (μm) | 0.50 | 0.25 | 0.25 | ||
| Program | 40 0C (2 min) 10 0C/min -> 100 0C 3 0C/min -> 160 0C 5 0C/min -> 260 0C (10 min) | not specified | not specified | 35C(1min) => 40C/min => 60C (1min) => 6C/min => 230C | 35C(2min) => 40C/min => 60C(2min) => 6C/min => 230C |
| I | 1417. | 1410. | 1381. | 1362. | 1387. |
| Reference | Ito and Mori, 2004 | Tachihara, Ishizaki, et al., 2004 | Vinogradov, 2004 | Matsui, Guth, et al., 1998 | Zehentbauer and Grosch, 1998 |
| Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
| Column type | Capillary |
|---|---|
| Active phase | Supelcowax-10 |
| Column length (m) | 30. |
| Carrier gas | He |
| Substrate | |
| Column diameter (mm) | 0.32 |
| Phase thickness (μm) | |
| Program | 35C => 40C/min => 60C(2min) => 4C/min => 240C |
| I | 1387. |
| Reference | Schieberle and Grosch, 1994 |
| Comment | MSDC-RI |
References
Go To: Top, Normal alkane RI, 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.
Gonzalez-Rios, Suarez-Quiroz, et al., 2007
Gonzalez-Rios, O.; Suarez-Quiroz, M.L.; Boulanger, R.; Barel, M.; Guyot, B.; Guiraud, J.-P.; Schorr-Galindo, S.,
Impact of ecological post-harvest processing of coffee aroma: II Roasted coffee.,
J. Food Composition Analysis, 2007, 20, 3-4, 297-307, https://doi.org/10.1016/j.jfca.2006.12.004
. [all data]
Viegas and Bassoli, 2007
Viegas, M.C.; Bassoli, D.G.,
Utilizacao do indice de retencao linear para caracterizacao de compostos volateis em cafe soluvel utilizando GC-MS e coluna HP-Innowax,
Quim. Nova, 2007, 30, 8, 2031-2034, https://doi.org/10.1590/S0100-40422007000800040
. [all data]
Kraft and Switt, 2005
Kraft, P.; Switt, K.A.D. (Eds),
Perspectives in Flavor and Fragrance Research, Wiley-VCH, Weinheim, Germany, 2005, 251. [all data]
Ito and Mori, 2004
Ito, K.; Mori, M.,
Formation of pyrazines in aqueous maltose/glucose/fructose-glutamide model systems upon heating at below 100 0C,
Food Sci. Technol. Res., 2004, 10, 2, 199-204, https://doi.org/10.3136/fstr.10.199
. [all data]
Tachihara, Ishizaki, et al., 2004
Tachihara, T.; Ishizaki, S.; Ishikawa, M.; Kitahara, T.,
Studies on the volatile compounds of roasted spotted shrimp,
Chemistry Biodiversity, 2004, 1, 12, 2024-2033, https://doi.org/10.1002/cbdv.200490155
. [all data]
Vinogradov, 2004
Vinogradov, B.A.,
Production, composition, properties and application of essential oils, 2004, retrieved from http://viness.narod.ru. [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, polar column, custom temperature program, References
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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