Pyrazine, 2,3-diethyl-5-methyl-
- Formula: C9H14N2
- Molecular weight: 150.2209
- IUPAC Standard InChIKey: PSINWXIDJYEXLO-UHFFFAOYSA-N
- CAS Registry Number: 18138-04-0
- 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-Methyl-5,6-diethylpyrazine; 2,3-Diethyl-5-methylpyrazine; 5-Methyl-2,3-diethylpyrazine; 2,3-Diethyl-6-methylpyrazine
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- Other data available:
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Normal alkane 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 | DB-5 | HP-5 MS | HP-5MS | BPX-5 | RTX-5 MS |
Column length (m) | 30. | 30. | 30. | 60. | 60. |
Carrier gas | Helium | He | He | He | |
Substrate | |||||
Column diameter (mm) | 0.25 | 0.25 | 0.25 | 0.32 | 0.25 |
Phase thickness (μm) | 0.25 | 0.25 | 0.25 | 1. | 0.5 |
Program | 40 0C (5 min) 5 0C/min -> 260 0C 15 0C/min -> 280 0C (1 min) | 50 0C (2 min) 20 0C/min -> 80 0C (1 min) 20 0C -> 100 0C (1 min) 30 0C/min -> 230 0C (2 min) | 50C(2min) => 20C/min => 80C (1min) => 20C/min => 100C(1min) => 30C/min => 230C(3min) | 40C (4min) => 2C/min => 90C => 4C/min => 130C => 8C/min => 250 C (10min) | 35C (3min) => 10C/min => 50C => 4C/min => 200C => 50C/min => 250C (10min) |
I | 1145. | 1171. | 1171. | 1170. | 1170. |
Reference | Yu and Zhang, 2010 | Wan Aida, Ho, et al., 2008 | Ho, Wan Aida, et al., 2007 | Machiels, Istasse, et al., 2004 | Machiels and Istasse, 2003 |
Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
Column type | Capillary | Capillary | Capillary | Capillary | Capillary |
---|---|---|---|---|---|
Active phase | CP Sil 5 CB | CP Sil 8 CB | DB-5 | SE-54 | SE-54 |
Column length (m) | 50. | 60. | 30. | 25. | 30. |
Carrier gas | He | He | He | ||
Substrate | |||||
Column diameter (mm) | 0.32 | 0.25 | 0.32 | 0.32 | 0.32 |
Phase thickness (μm) | 1.2 | 0.25 | 0.25 | 0.25 | 0.25 |
Program | 36C => 20C/min => 85C => 1C/min => 145C=3C/min => 250C(30min) | not specified | 35C(1min) => 40C/min => 60C (1min) => 6C/min => 230C | 35C(2min) => 50C/min => 60C(2min) => 4C/min => 230C | 35C (2min) => 40C/min => 60C (2min) => 6C/min => 180C => 10C/min => 240C |
I | 1135. | 1161. | 1156. | 1158. | 1158. |
Reference | Counet, Callemien, et al., 2002 | Duckham, Dodson, et al., 2001 | Matsui, Guth, et al., 1998 | Zehentbauer and Grosch, 1998 | Schermann and Schieberle, 1997 |
Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
Column type | Capillary | Capillary | Capillary | Capillary | Capillary |
---|---|---|---|---|---|
Active phase | SE-54 | DB-5 | SE-54 | DB-5 | SE-54 |
Column length (m) | 30. | 30. | 30. | ||
Carrier gas | He | He | |||
Substrate | |||||
Column diameter (mm) | 0.32 | 0.32 | 0.32 | ||
Phase thickness (μm) | 0.25 | ||||
Program | 35C (2min) => 40C/min => 60C (2min) => 6C/min => 180C => 10C/min => 240C | not specified | 0C (2min) => 6C/min => 50C (2min) => 6C/min => 230 C (10min) | 35C => 40C/min => 50C(2min) => 4C/min => 240C | not specified |
I | 1158. | 1158. | 1160. | 1156. | 1160. |
Reference | Schermann and Schieberle, 1997 | Schieberle, 1996 | Guth and Grosch, 1994 | Schieberle and Grosch, 1994 | Guth and Grosch, 1993 |
Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
Column type | Capillary |
---|---|
Active phase | SE-54 |
Column length (m) | |
Carrier gas | |
Substrate | |
Column diameter (mm) | |
Phase thickness (μm) | |
Program | not specified |
I | 1155. |
Reference | Blank, Sen, et al., 1992 |
Comment | MSDC-RI |
References
Go To: Top, Normal alkane 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.
Yu and Zhang, 2010
Yu, A.-N.; Zhang, A.-D.,
The effect of pH on the total formation of aroma compounds produced by hearting a model system containing L-ascorbic acid with L-threonine/L-serine,
Food Chem., 2010, 119, 1, 214-219, https://doi.org/10.1016/j.foodchem.2009.06.026
. [all data]
Wan Aida, Ho, et al., 2008
Wan Aida, W.M.; Ho, C.W.; Maskat, M.Y.; Osman, H.,
Relating descriptive sensory analysis to gas chromatography / mass spectrometry of palm sugars using partial least squares regression,
ASEAN Food J., 2008, 15, 1, 35-45. [all data]
Ho, Wan Aida, et al., 2007
Ho, C.W.; Wan Aida, W.M.; Maskat, M.Y.; Osman, H.,
Changes in volatile compounds of palm sap (Arenga pinnata) during the heating process for production of palm sugar,
Food Chem., 2007, 102, 4, 1156-1162, https://doi.org/10.1016/j.foodchem.2006.07.004
. [all data]
Machiels, Istasse, et al., 2004
Machiels, D.; Istasse, L.; van Ruth, S.M.,
Gas chromatography-olfactometry analysis of beef meat originating from differently fed Belgian Blue, Limousin and Aberdeen Angus bulls,
Food Chem., 2004, 86, 3, 377-383, https://doi.org/10.1016/j.foodchem.2003.09.011
. [all data]
Machiels and Istasse, 2003
Machiels, D.; Istasse, L.,
Evaluation of two commercial solid-phase microextraction fibres for the analysis of target aroma compounds in cooked beef meat,
Talanta, 2003, 61, 4, 529-537, https://doi.org/10.1016/S0039-9140(03)00319-9
. [all data]
Counet, Callemien, et al., 2002
Counet, C.; Callemien, D.; Ouwerx, C.; Collin, S.,
Use of gas chromatography-olfactometry to identify key odorant compounds in dark chocolate. Comparison of samples before and after conching,
J. Agric. Food Chem., 2002, 50, 8, 2385-2391, https://doi.org/10.1021/jf0114177
. [all data]
Duckham, Dodson, et al., 2001
Duckham, S.C.; Dodson, A.T.; Bakker, J.; Ames, J.M.,
Volatile flavour components of baked potato flesh. A comparison of eleven potato cultivars,
Nahrung/Food, 2001, 45, 5, 317-323, https://doi.org/10.1002/1521-3803(20011001)45:5<317::AID-FOOD317>3.0.CO;2-4
. [all data]
Matsui, Guth, et al., 1998
Matsui, T.; Guth, H.; Grosch, W.,
A comparative study of potent odorants in peanut, hazelnut, and pumpkin seed oils on the basis of aroma extract dilution analysis (AEDA) and gas chromatography-olfactometry of headspace samples (GCOH),
Lipid - Fett, 1998, 100, 2, 51-56, https://doi.org/10.1002/(SICI)1521-4133(199802)100:2<51::AID-LIPI51>3.0.CO;2-W
. [all data]
Zehentbauer and Grosch, 1998
Zehentbauer, G.; Grosch, W.,
Crust aroma of baguettes. I. Key odorants of baguettes prepared in two different ways,
J. Cereal Science, 1998, 28, 1, 81-92, https://doi.org/10.1006/jcrs.1998.0184
. [all data]
Schermann and Schieberle, 1997
Schermann, P.; Schieberle, P.,
Evaluation of key odorants in milk chocolate and cocoa mass by aroma extract dilution analyses,
J. Agric. Food Chem., 1997, 45, 3, 867-872, https://doi.org/10.1021/jf960670h
. [all data]
Schieberle, 1996
Schieberle, P.,
Odour-active compounds in moderately roasted sesame,
Food Chem., 1996, 55, 2, 145-152, https://doi.org/10.1016/0308-8146(95)00095-X
. [all data]
Guth and Grosch, 1994
Guth, H.; Grosch, W.,
Identification of the character impact odorants of stewed beef juice by instrumental analyses and sensory studies,
J. Agric. Food Chem., 1994, 42, 12, 2862-2866, https://doi.org/10.1021/jf00048a039
. [all data]
Schieberle and Grosch, 1994
Schieberle, P.; Grosch, W.,
Potent odorants of rye bread crust - differences from the crumb and from wheat bread crust,
Z. Lebensm. Unters. Forsch., 1994, 198, 4, 292-296, https://doi.org/10.1007/BF01193177
. [all data]
Guth and Grosch, 1993
Guth, H.; Grosch, W.,
12-Methyltridecanal, a species-specific odorant of stewed beef,
Lebensm. Wiss. Technol., 1993, 26, 2, 171-177, https://doi.org/10.1006/fstl.1993.1035
. [all data]
Blank, Sen, et al., 1992
Blank, I.; Sen, A.; Grosch, W.,
Potent odorants of the roasted powder and brew of Arabica coffee,
Z. Lebensm. Unters Forsch., 1992, 195, 3, 239-245, https://doi.org/10.1007/BF01202802
. [all data]
Notes
Go To: Top, Normal alkane RI, non-polar column, custom temperature program, References
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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