Pyrazine, 2,5-dimethyl-
- Formula: C6H8N2
- Molecular weight: 108.1411
- IUPAC Standard InChI: InChI=1S/C6H8N2/c1-5-3-8-6(2)4-7-5/h3-4H,1-2H3
- IUPAC Standard InChIKey: LCZUOKDVTBMCMX-UHFFFAOYSA-N
- CAS Registry Number: 123-32-0
- 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: 2,5-Dimethylpyrazine
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Van Den Dool and Kratz 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 | Supelcowax-10 | Supelcowax-10 | Supelcowax-10 | FFAP | FFAP |
| Column length (m) | 30. | 30. | 30. | 60. | 60. |
| Carrier gas | He | He | He | He | He |
| Substrate | |||||
| Column diameter (mm) | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 |
| Phase thickness (μm) | 0.25 | 0.25 | 0.25 | 0.5 | 0.5 |
| Program | 35C(8min) => 4C/min => 60C => 6C/min => 160C => 20C/min => 200C(1min) | 40C(1min) => 10C/min => 120C => 15C/min => 200C (1min) | 35C(8min) => 4C/min => 60C => 6C/min => 160C => 20C/min => 200C(1min) | 50C(3min) => 3C/min => 100C => 10C/min => 220C(13.5min) | 50C(3min) => 3C/min => 100C => 10C/min => 220C (13.5min) |
| I | 1318. | 1323. | 1321. | 1358. | 1358. |
| Reference | Bianchi, Careri, et al., 2007 | Bianchi, Careri, et al., 2007 | Bianchi, Careri, et al., 2007 | Ranau, Kleeberg, et al., 2005 | Ranau and Steinhart, 2005 |
| Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
| Column type | Capillary | Capillary | Capillary | Capillary | Capillary |
|---|---|---|---|---|---|
| Active phase | CP-Wax 52CB | DB-Wax | Supelcowax-10 | DB-Wax | BP-20 |
| Column length (m) | 60. | 30. | 60. | 30. | 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 | 0.25 | 0.5 |
| Program | 40C => 5C/min => 60C => 2.5C/min => 155C | 20C(30s) => fast => 60C => 4C/min => 220C (20min) | 40C => (6C/min) => 80C(6min) => (15C/min) => 200C(10min) | 35C(2min) => 6C/min => 150C => 30C/min => 240C(1min) | 5 0C (0.5 min) -> (1 min) 60 0C (5 min) 4 0C/min -> 200 0C |
| I | 1317. | 1314. | 1316. | 1319. | 1306. |
| Reference | Alasalvar, Shahidi, et al., 2003 | Cantergiani, Brevard, et al., 2001 | Baek and Cadwallader, 1996 | Amrani-Hemaimi, Cerny, et al., 1995 | Beal and Mottram, 1994 |
| Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
References
Go To: Top, Van Den Dool and Kratz 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.
Bianchi, Careri, et al., 2007
Bianchi, F.; Careri, M.; Mangia, A.; Musci, M.,
Retention indices in the analysis of food aroma volatile compounds in temperature-programmed gas chromatography: Database creation and evaluation of precision and robustness,
J. Sep. Sci., 2007, 39, 4, 563-572, https://doi.org/10.1002/jssc.200600393
. [all data]
Ranau, Kleeberg, et al., 2005
Ranau, R.; Kleeberg, K.K.; Schlegelmilch, M.; Streese, J.; Stegmann, R.; Steinhart, H.,
Analytical determination of the suitability of different processes for the treatment of odorous waste gas,
Waste Management, 2005, 25, 9, 908-916, https://doi.org/10.1016/j.wasman.2005.07.004
. [all data]
Ranau and Steinhart, 2005
Ranau, R.; Steinhart, H.,
Identification and evaluation of volatile odor-active pollutants from different odor emission sources in the food industry,
Eur. Food Res. Technol., 2005, 220, 2, 226-231, https://doi.org/10.1007/s00217-004-1073-4
. [all data]
Alasalvar, Shahidi, et al., 2003
Alasalvar, C.; Shahidi, F.; Cadwallader, K.R.,
Comparison of natural and roasted Turkish Tombul hazelnut (Corylus avellana L.) volatiles and flavor by DHA/GC/MS and descriptive sensory analysis,
J. Agric. Food Chem., 2003, 51, 17, 5067-5072, https://doi.org/10.1021/jf0300846
. [all data]
Cantergiani, Brevard, et al., 2001
Cantergiani, E.; Brevard, H.; Krebs, Y.; Feria-Morales, A.; Amadò, R.; Yeretzian, C.,
Characterisation of the aroma of green Mexican coffee and identification of mouldy/earthy defect,
Eur. Food Res. Technol., 2001, 212, 6, 648-657, https://doi.org/10.1007/s002170100305
. [all data]
Baek and Cadwallader, 1996
Baek, H.H.; Cadwallader, K.R.,
Volatile compounds in flavor concentrates produced from crayfish-processing byproducts with and without protease treatment,
J. Agric. Food Chem., 1996, 44, 10, 3262-3267, https://doi.org/10.1021/jf960023q
. [all data]
Amrani-Hemaimi, Cerny, et al., 1995
Amrani-Hemaimi, M.; Cerny, C.; Fay, L.B.,
Mechanisms of formation of alkylpyrazines in the Maillard reaction,
J. Agric. Food Chem., 1995, 43, 11, 2818-2822, https://doi.org/10.1021/jf00059a009
. [all data]
Beal and Mottram, 1994
Beal, A.D.; Mottram, D.S.,
Compounds contributing to the characteristic aroma of malted barley,
J. Agric. Food Chem., 1994, 42, 12, 2880-2884, https://doi.org/10.1021/jf00048a043
. [all data]
Notes
Go To: Top, Van Den Dool and Kratz RI, polar column, custom temperature program, References
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