Pyrazine, 3-ethyl-2,5-dimethyl-
- Formula: C8H12N2
- Molecular weight: 136.1943
- IUPAC Standard InChI: InChI=1S/C8H12N2/c1-4-8-7(3)9-5-6(2)10-8/h5H,4H2,1-3H3
- IUPAC Standard InChIKey: WHMWOHBXYIZFPF-UHFFFAOYSA-N
- CAS Registry Number: 13360-65-1
- 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-3,6-dimethylpyrazine; 2,5-Dimethyl-3-ethylpyrazine; 3-Ethyl-2,5-dimethylpyrazine; 3,6-Dimethyl-2-ethylpyrazine; Pyrazine, 2-ethyl-3,6-dimethyl
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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 | CP-Wax 52CB | DB-Wax |
| Column length (m) | 30. | 30. | 50. | 50. | 60. |
| Carrier gas | He | He | He | ||
| Substrate | |||||
| Column diameter (mm) | 0.25 | 0.25 | 0.32 | 0.32 | 0.25 |
| Phase thickness (μm) | 0.5 | 0.5 | 0.25 | ||
| Tstart (C) | 40. | 40. | 60. | 60. | 40. |
| Tend (C) | 250. | 250. | 220. | 220. | 200. |
| Heat rate (K/min) | 4. | 4. | 4. | 4. | 2. |
| Initial hold (min) | 5. | 5. | 5. | 5. | 5. |
| Final hold (min) | 15. | 15. | 30. | 30. | 30. |
| I | 1447. | 1450. | 1433. | 1443. | 1444. |
| Reference | Pozo-Bayon M.A., Ruiz-Rodriguez A., et al., 2007 | Pozo-Bayon M.A., Ruiz-Rodriguez A., et al., 2007 | Mahadevan and Farmer, 2006 | Mahadevan and Farmer, 2006 | Kim, 2001 |
| Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
| Column type | Capillary | Capillary | Capillary | Capillary | Capillary |
|---|---|---|---|---|---|
| Active phase | Supelcowax-10 | FFAP | PEG-20M | DB-Wax | DB-Wax |
| Column length (m) | 60. | 60. | 60. | 60. | 60. |
| Carrier gas | He | He | He | He | |
| Substrate | |||||
| Column diameter (mm) | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 |
| Phase thickness (μm) | 0.25 | 0.5 | 0.25 | 0.25 | 0.25 |
| Tstart (C) | 35. | 50. | 50. | 50. | 50. |
| Tend (C) | 195. | 230. | 230. | 230. | 230. |
| Heat rate (K/min) | 2. | 5. | 2. | 3. | 2. |
| Initial hold (min) | 5. | 3. | |||
| Final hold (min) | 90. | 15. | 60. | 60. | |
| I | 1446. | 1477. | 1449. | 1438. | 1449. |
| Reference | Chung, 1999 | Stephan and Steinhart, 1999 | Shimoda, Nakada, et al., 1997 | Shimoda, Peralta, et al., 1996 | Shimoda, Shiratsuchi, et al., 1996 |
| Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
| Column type | Capillary | Capillary | Capillary | Capillary | Capillary |
|---|---|---|---|---|---|
| Active phase | DB-Wax | CP-Wax 52CB | Supelcowax-10 | Supelcowax-10 | CP-WAX 57CB |
| Column length (m) | 60. | 50. | 60. | 60. | 50. |
| Carrier gas | H2 | ||||
| Substrate | |||||
| Column diameter (mm) | 0.25 | 0.32 | 0.25 | 0.25 | 0.32 |
| Phase thickness (μm) | 0.25 | 0.25 | 0.25 | ||
| Tstart (C) | 50. | 50. | 40. | 40. | 60. |
| Tend (C) | 230. | 200. | 175. | 175. | 200. |
| Heat rate (K/min) | 2. | 1.5 | 2. | 2. | 4. |
| Initial hold (min) | 10. | 5. | 5. | 5. | |
| Final hold (min) | 80. | 20. | 20. | ||
| I | 1439. | 1408. | 1446. | 1447. | 1449. |
| Reference | Shimoda, Shigematsu, et al., 1995 | Wu and Liou, 1992 | Tanchotikul and Hsieh, 1989 | Tanchotikul and Hsieh, 1989 | Salter L.J., Mottram D.S., et al., 1988 |
| Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
| Column type | Capillary | Capillary |
|---|---|---|
| Active phase | CP-WAX 57CB | CP-WAX 57CB |
| Column length (m) | 50. | 50. |
| Carrier gas | He | He |
| Substrate | ||
| Column diameter (mm) | 0.32 | 0.32 |
| Phase thickness (μm) | ||
| Tstart (C) | 60. | 60. |
| Tend (C) | 200. | 200. |
| Heat rate (K/min) | 4. | 4. |
| Initial hold (min) | 5. | 5. |
| Final hold (min) | 10. | 10. |
| I | 1449. | 1450. |
| Reference | Whitfield, Mottram, et al., 1988 | Whitfield, Mottram, et al., 1988 |
| Comment | 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.
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]
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]
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]
Chung, 1999
Chung, H.Y.,
Volatile components in fermented soybean (Glycine max) curds,
J. Agric. Food Chem., 1999, 47, 7, 2690-2696, https://doi.org/10.1021/jf981166a
. [all data]
Stephan and Steinhart, 1999
Stephan, A.; Steinhart, H.,
Identification of character impact odorants of different soybean lecithins,
J. Agric. Food Chem., 1999, 47, 7, 2854-2859, https://doi.org/10.1021/jf981387g
. [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]
Wu and Liou, 1992
Wu, C.-M.; Liou, S.-E.,
Volatile components of water-boiled duck meat and Cantonese style roasted duck,
J. Agric. Food Chem., 1992, 40, 5, 838-841, https://doi.org/10.1021/jf00017a026
. [all data]
Tanchotikul and Hsieh, 1989
Tanchotikul, U.; Hsieh, T.C.-Y.,
Volatile Flavor Components in Crayfish Waste,
J. Food Sci., 1989, 54, 6, 1515-1520, https://doi.org/10.1111/j.1365-2621.1989.tb05149.x
. [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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