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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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 | Supelcowax-10 |
| Column length (m) | 30. | 30. | 50. | 50. | 60. |
| Carrier gas | He | He | He | He | |
| Substrate | |||||
| Column diameter (mm) | 0.32 | 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. | 35. |
| Tend (C) | 240. | 240. | 220. | 220. | 195. |
| Heat rate (K/min) | 5. | 5. | 4. | 5. | 2. |
| Initial hold (min) | 5. | 5. | |||
| Final hold (min) | 10. | 10. | 30. | 90. | |
| I | 1414. | 1414. | 1390. | 1373. | 1403. |
| Reference | Lopez-Galilea I., Fournier N., et al., 2006 | Lopez-Galilea I., Fournier N., et al., 2006 | Mahadevan and Farmer, 2006 | Bonvehí, 2005 | Chung, Yung, et al., 2002 |
| Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
| Column type | Capillary | Capillary | Capillary | Capillary | Capillary |
|---|---|---|---|---|---|
| Active phase | Supelcowax-10 | DB-Wax | CP-WAX 57CB | CP-WAX 57CB | CP-WAX 57CB |
| Column length (m) | 60. | 60. | 50. | 50. | 50. |
| Carrier gas | He | He | He | He | |
| Substrate | |||||
| Column diameter (mm) | 0.25 | 0.25 | 0.32 | 0.32 | 0.32 |
| Phase thickness (μm) | 0.25 | 0.25 | |||
| Tstart (C) | 35. | 40. | 60. | 60. | 60. |
| Tend (C) | 195. | 200. | 200. | 200. | 200. |
| Heat rate (K/min) | 2. | 2. | 4. | 4. | 4. |
| Initial hold (min) | 5. | 5. | 5. | 5. | 5. |
| Final hold (min) | 90. | 30. | 10. | 10. | |
| I | 1403. | 1402. | 1407. | 1407. | 1407. |
| Reference | Chung, Yung, et al., 2001 | Kim, 2001 | Salter L.J., Mottram D.S., et al., 1988 | Whitfield, Mottram, et al., 1988 | Whitfield, Mottram, et al., 1988 |
| Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | 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.
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]
Chung, Yung, et al., 2002
Chung, H.-Y.; Yung, I.K.S.; Ma, W.C.J.; Kim, J.-S.,
Analysis of volatile components in frozen and dried scallops (Patinopecten yessoensis) by gas chromatography/mass spectrometry,
Food Res. Int., 2002, 35, 1, 43-53, https://doi.org/10.1016/S0963-9969(01)00107-7
. [all data]
Chung, Yung, et al., 2001
Chung, H.Y.; Yung, I.K.S.; Kim, J.-S.,
Comparison of volatile components in dried scallops (Chlamys farreri and Patinopecten yessoensis) prepared by boiling and steaming methods,
J. Agric. Food Chem., 2001, 49, 1, 192-202, https://doi.org/10.1021/jf000692a
. [all data]
Kim, 2001
Kim, J.S.,
Einfluss der Temperatur beim Rösten von Sesam auf Aroma und antioxidative Eigenschaften des Öls, PhD Thesis, Technischen Universität Berlin zur Erlangung des akademischen Grades, Berlin, 2001, 151. [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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