Pyrazine, trimethyl-
- Formula: C7H10N2
- Molecular weight: 122.1677
- IUPAC Standard InChIKey: IAEGWXHKWJGQAZ-UHFFFAOYSA-N
- CAS Registry Number: 14667-55-1
- 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: Trimethylpyrazine; 2,3,5-Trimethylpyrazine; 2,3,6-Trimethylpyrazine; Pyrazine, 2,3,5-trimethyl
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Van Den Dool and Kratz RI, non-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 | SE-54 | DB-5 | ZB-5 | CP-Sil 8CB-MS | DB-5 |
Column length (m) | 25. | 30. | 30. | 60. | 50. |
Carrier gas | He | He | He | He | He |
Substrate | |||||
Column diameter (mm) | 0.32 | 0.32 | 0.25 | 0.25 | 0.32 |
Phase thickness (μm) | 0.25 | 0.25 | 0.25 | 0.25 | 0.5 |
Program | 40C(1min) => 40C/min => 60C(1min) => 4C/min => 140C => 20C/min => 240C(5min) | 40C(3min) => 3C/min => 180C => 10C/min => 260C(2min) | 50C(1min) => 3C/min => 209C => 20C/min => 280C | 0C(5min) => 40C/min => 40C (2min) => 4C/min => 280C | oC(5min) => 60C/min => 60C (5min) => 4C/min => 250C |
I | 1011. | 990. | 989. | 1007. | 1011. |
Reference | Frauendorfer and Schieberle, 2006 | Moon, Cliff, et al., 2006 | Lu, Hao, et al., 2005 | Elmore, Mottram, et al., 2000 | Parker, Hassell, et al., 2000 |
Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
Column type | Capillary | Capillary | Capillary | Capillary | Capillary |
---|---|---|---|---|---|
Active phase | SE-54 | BPX-5 | BPX-5 | SE-54 | SE-54 |
Column length (m) | 30. | 50. | 50. | 25. | 30. |
Carrier gas | He | He | He | He | |
Substrate | |||||
Column diameter (mm) | 0.32 | 0.32 | 0.32 | 0.32 | 0.32 |
Phase thickness (μm) | 0.25 | 0.5 | 0.5 | 0.5 | 0.25 |
Program | 35C (2min) => 40C/min => 60C (2min) => 6C/min => 180C (5min) => 10C/min => 230C (5min) | 0C(5min) => 40C/min => 40C(2min) => 4C/min => 280C | OC (5min) => 60C/min => 60C(5min) => 4C/min => 250C | 35C (2min) => 4C/min => 150C => 10C/min => 240C | 35C(2min) => 40C/min => 50C(5min) => 6C/min => 230C(15min) |
I | 1000. | 1015. | 1014. | 1000. | 1000. |
Reference | Tairu, Hofmann, et al., 2000 | Elmore, Mottram, et al., 1999 | Bredie, Mottram, et al., 1998 | Fickert and Schieberle, 1998 | Hofmann and Schieberle, 1998 |
Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
Column type | Capillary | Capillary | Capillary |
---|---|---|---|
Active phase | SE-54 | BPX-5 | DB-5 |
Column length (m) | 30. | 50. | 30. |
Carrier gas | He | He | He |
Substrate | |||
Column diameter (mm) | 0.32 | 0.32 | 0.32 |
Phase thickness (μm) | 0.25 | 0.5 | 1.0 |
Program | 40C (2min) => 40C/min => 50C (2min) => 240C (10min) | OC => 60C/min => 60C(5min) => 4C/min => 250C(20min) | 5 0C (0.5 min) -> (1 min) 60 0C (5 min) 4 0C/min -> 250 0C |
I | 1000. | 1016. | 999. |
Reference | Münch, Hofmann, et al., 1997 | Owens J.D., Allagheny N., et al., 1997 | Beal and Mottram, 1994 |
Comment | MSDC-RI | MSDC-RI | MSDC-RI |
References
Go To: Top, Van Den Dool and Kratz RI, non-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.
Frauendorfer and Schieberle, 2006
Frauendorfer, F.; Schieberle, P.,
Identification of the key aroma compounds in Cocoa powder based on molecular sensoly correlations,
J. Agr. Food Chem., 2006, 54, 15, 5521-5529, https://doi.org/10.1021/jf060728k
. [all data]
Moon, Cliff, et al., 2006
Moon, S.-Y.; Cliff, M.A.; Li-Chan, E.C.Y.,
Odour-active components of simulated beef flavour analysed by solid phase microextraction and gas chromatography-mass spectrometry and -olfactometry,
Food Res. Int., 2006, 39, 3, 294-308, https://doi.org/10.1016/j.foodres.2005.08.002
. [all data]
Lu, Hao, et al., 2005
Lu, C.-Y.; Hao, Z.; Payne, R.; Ho, C.-T.,
Effects of water content on volatile generation and peptide degradation in the Maillard reaction of glycine, diglycine, and triglycine,
J. Agric. Food Chem., 2005, 53, 16, 6443-6447, https://doi.org/10.1021/jf050534p
. [all data]
Elmore, Mottram, et al., 2000
Elmore, J.S.; Mottram, D.S.; Enser, M.; Wood, J.D.,
The effects of diet and breed on the volatile compounds of cooked lamb,
Meat Sci., 2000, 55, 2, 149-159, https://doi.org/10.1016/S0309-1740(99)00137-0
. [all data]
Parker, Hassell, et al., 2000
Parker, J.K.; Hassell, G.M.E.; Mottram, D.S.; Guy, R.C.E.,
Sensory and instrumental analyses of volatiles generated during the extrusion cooking of oat flours,
J. Agric. Food Chem., 2000, 48, 8, 3497-3506, https://doi.org/10.1021/jf991302r
. [all data]
Tairu, Hofmann, et al., 2000
Tairu, A.O.; Hofmann, T.; Schieberle, P.,
Studies on the key odorants formed by roasting of wild mango seeds (Irvingia gabonensis),
J. Agric. Food Chem., 2000, 48, 6, 2391-2394, https://doi.org/10.1021/jf990765u
. [all data]
Elmore, Mottram, et al., 1999
Elmore, J.S.; Mottram, D.S.; Enser, M.; Wood, J.D.,
Effect of the polyunsaturated fatty acid composition of beef muscle on the profile of aroma volatiles,
J. Agric. Food Chem., 1999, 47, 4, 1619-1625, https://doi.org/10.1021/jf980718m
. [all data]
Bredie, Mottram, et al., 1998
Bredie, W.L.P.; Mottram, D.S.; Guy, R.C.E.,
Aroma volatiles generated during extrusion cooking of maize flour,
J. Agric. Food Chem., 1998, 46, 4, 1479-1487, https://doi.org/10.1021/jf9708857
. [all data]
Fickert and Schieberle, 1998
Fickert, B.; Schieberle, P.,
Identification of the key odorants in barley malt (caramalt) using GC/MS techniques and odour dilution analyses,
Nahrung, 1998, 42, 6, 371-375, https://doi.org/10.1002/(SICI)1521-3803(199812)42:06<371::AID-FOOD371>3.0.CO;2-V
. [all data]
Hofmann and Schieberle, 1998
Hofmann, T.; Schieberle, P.,
Identification of key aroma compounds generated from cysteine and carbohydrates under roasting conditions,
Z. Lebensm. Unters. Forsch. A, 1998, 207, 3, 229-236, https://doi.org/10.1007/s002170050324
. [all data]
Münch, Hofmann, et al., 1997
Münch, P.; Hofmann, T.; Schieberle, P.,
Comparison of key odorants generated by thermal treatment of commercial and self-prepared yeast extracts: influence of the amino acid composition on odorant formation,
J. Agric. Food Chem., 1997, 45, 4, 1338-1344, https://doi.org/10.1021/jf960658p
. [all data]
Owens J.D., Allagheny N., et al., 1997
Owens J.D.; Allagheny N.; Kipping G.; Ames J.M.,
Formation of volatile compounds during Bacillus subtilis fermentation of soya beans,
J. Sci. Food Agric., 1997, 74, 1, 132-140, https://doi.org/10.1002/(SICI)1097-0010(199705)74:1<132::AID-JSFA779>3.0.CO;2-8
. [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, non-polar column, custom temperature program, References
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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