Pyrazine, 2-ethyl-5-methyl-
- Formula: C7H10N2
- Molecular weight: 122.1677
- IUPAC Standard InChI: InChI=1S/C7H10N2/c1-3-7-5-8-6(2)4-9-7/h4-5H,3H2,1-2H3
- IUPAC Standard InChIKey: OXCKCFJIKRGXMM-UHFFFAOYSA-N
- CAS Registry Number: 13360-64-0
- 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-5-methylpyrazine; 2-Methyl-5-ethylpyrazine; 2,5-Methylethylpyrazine; 5-Ethyl-2-methylpyrazine; Pyrazine, 5-ethyl-2-methyl
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Van Den Dool and Kratz RI, polar column, temperature ramp
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 | CP-Wax 52CB | OV-351 | PEG-20M |
| Column length (m) | 30. | 30. | 50. | 50. | 60. |
| Carrier gas | He | He | He | He | |
| Substrate | |||||
| Column diameter (mm) | 0.25 | 0.32 | 0.32 | 0.32 | 0.25 |
| Phase thickness (μm) | 0.5 | 0.5 | 0.2 | 0.25 | |
| Tstart (C) | 40. | 40. | 60. | 60. | 50. |
| Tend (C) | 250. | 240. | 220. | 220. | 230. |
| Heat rate (K/min) | 4. | 5. | 4. | 5. | 2. |
| Initial hold (min) | 5. | 5. | |||
| Final hold (min) | 15. | 10. | 30. | 60. | |
| I | 1392. | 1402. | 1376. | 1363. | 1397. |
| Reference | Pozo-Bayon M.A., Ruiz-Rodriguez A., et al., 2007 | Lopez-Galilea I., Fournier N., et al., 2006 | Mahadevan and Farmer, 2006 | Bonvehí, 2005 | Shimoda, Nakada, et al., 1997 |
| Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
| Column type | Capillary | Capillary | Capillary | Capillary | Capillary |
|---|---|---|---|---|---|
| Active phase | DB-Wax | DB-Wax | DB-Wax | CP-WAX 57CB | CP-WAX 57CB |
| Column length (m) | 60. | 60. | 60. | 50. | 50. |
| Carrier gas | He | He | He | ||
| Substrate | |||||
| Column diameter (mm) | 0.25 | 0.25 | 0.25 | 0.32 | 0.32 |
| Phase thickness (μm) | 0.25 | 0.25 | 0.25 | ||
| Tstart (C) | 50. | 50. | 50. | 60. | 60. |
| Tend (C) | 230. | 230. | 230. | 200. | 200. |
| Heat rate (K/min) | 3. | 2. | 2. | 4. | 4. |
| Initial hold (min) | 5. | 5. | |||
| Final hold (min) | 60. | 10. | |||
| I | 1393. | 1397. | 1383. | 1394. | 1393. |
| Reference | Shimoda, Peralta, et al., 1996 | Shimoda, Shiratsuchi, et al., 1996 | Shimoda, Shigematsu, et al., 1995 | Salter L.J., Mottram D.S., et al., 1988 | Whitfield, Mottram, et al., 1988 |
| Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
| Column type | Capillary |
|---|---|
| Active phase | CP-WAX 57CB |
| Column length (m) | 50. |
| Carrier gas | He |
| Substrate | |
| Column diameter (mm) | 0.32 |
| Phase thickness (μm) | |
| Tstart (C) | 60. |
| Tend (C) | 200. |
| Heat rate (K/min) | 4. |
| Initial hold (min) | 5. |
| Final hold (min) | 10. |
| I | 1394. |
| Reference | Whitfield, Mottram, et al., 1988 |
| Comment | MSDC-RI |
References
Go To: Top, Van Den Dool and Kratz RI, polar column, temperature ramp, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Pozo-Bayon M.A., Ruiz-Rodriguez A., et al., 2007
Pozo-Bayon M.A.; Ruiz-Rodriguez A.; Pernin K.; Cayot N.,
Influence of eggs on the aroma composition of a sponge cake and on the aroma release in model studies on flavored sponge cakes,
J. Agric. Food Chem., 2007, 55, 4, 1418-1426, https://doi.org/10.1021/jf062203y
. [all data]
Lopez-Galilea I., Fournier N., et al., 2006
Lopez-Galilea I.; Fournier N.; Cid C.; Guichard E.,
Changes in headspace volatile concentrations of coffee brews caused by the roasting process and the brewing procedure,
J. Agric. Food Chem., 2006, 54, 22, 8560-8566, https://doi.org/10.1021/jf061178t
. [all data]
Mahadevan and Farmer, 2006
Mahadevan, K.; Farmer, L.,
Key Odor Impact Compounds in Three Yeast Extract Pastes,
J. Agric. Food Chem., 2006, 54, 19, 7242-7250, https://doi.org/10.1021/jf061102x
. [all data]
Bonvehí, 2005
Bonvehí, J.S.,
Investigation of aromatic compounds in roasted cocoa powder,
Eur. Food Res. Technol., 2005, 221, 1-2, 19-29, https://doi.org/10.1007/s00217-005-1147-y
. [all data]
Shimoda, Nakada, et al., 1997
Shimoda, M.; Nakada, Y.; Nakashima, M.; Osajima, Y.,
Quantitative comparison of volatile flavor compounds in deep-roasted and light-roasted sesame seed oil,
J. Agric. Food Chem., 1997, 45, 8, 3193-3196, https://doi.org/10.1021/jf970172o
. [all data]
Shimoda, Peralta, et al., 1996
Shimoda, M.; Peralta, R.R.; Osajima, Y.,
Headspace gas analysis of fish sauce,
J. Agric. Food Chem., 1996, 44, 11, 3601-3605, https://doi.org/10.1021/jf960345u
. [all data]
Shimoda, Shiratsuchi, et al., 1996
Shimoda, M.; Shiratsuchi, H.; Nakada, Y.; Wu, Y.; Osajima, Y.,
Identification and sensory characterization of volatile flavor compounds in sesame seed oil,
J. Agric. Food Chem., 1996, 44, 12, 3909-3912, https://doi.org/10.1021/jf960115f
. [all data]
Shimoda, Shigematsu, et al., 1995
Shimoda, M.; Shigematsu, H.; Shiratsuchi, H.; Osajima, Y.,
Comparison of the odor concentrates by SDE and adsorptive column method from green tea infusion,
J. Agric. Food Chem., 1995, 43, 6, 1616-1620, https://doi.org/10.1021/jf00054a037
. [all data]
Salter L.J., Mottram D.S., et al., 1988
Salter L.J.; Mottram D.S.; Whitfield,
Volatile compounds produces in Maillard reactions involving glycine, ribose and phospholid,
J. Sci. Food Agric., 1988, 46, 2, 227-242, https://doi.org/10.1002/jsfa.2740460211
. [all data]
Whitfield, Mottram, et al., 1988
Whitfield, F.B.; Mottram, D.S.; Brock, S.; Puckey, D.J.; Salter, L.J.,
Effect of Phospholipid on the Formation of Volatile Heterocyclic Compounds in Heated Aqueous Solutions of Amino Acids and Ribose,
J. Sci. Food Agric., 1988, 42, 3, 261-272, https://doi.org/10.1002/jsfa.2740420309
. [all data]
Notes
Go To: Top, Van Den Dool and Kratz RI, polar column, temperature ramp, References
- Symbols used in this document:
Tend Final temperature Tstart Initial temperature - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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