Thiophene, 3,4-dimethyl-
- Formula: C6H8S
- Molecular weight: 112.193
- IUPAC Standard InChIKey: GPSFYJDZKSRMKZ-UHFFFAOYSA-N
- CAS Registry Number: 632-15-5
- 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: 3,4-Dimethylthiophene
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Van Den Dool and Kratz RI, non-polar column, temperature ramp
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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 | BPX-5 | BP-5 | Ultra-1 | HP-1 | HP-1 |
Column length (m) | 50. | 50. | 25. | 50. | 50. |
Carrier gas | H2 | He | He | ||
Substrate | |||||
Column diameter (mm) | 0.32 | 0.32 | 0.2 | 0.32 | 0.32 |
Phase thickness (μm) | 0.5 | 0.33 | 1.05 | 1.05 | |
Tstart (C) | 60. | 60. | 60. | 40. | 40. |
Tend (C) | 250. | 250. | 230. | 260. | 260. |
Heat rate (K/min) | 4. | 4. | 2. | 2. | 2. |
Initial hold (min) | 5. | ||||
Final hold (min) | 20. | ||||
I | 890. | 887. | 883.5 | 885. | 898. |
Reference | Bredie, Mottram, et al., 2002 | Whitfield and Mottram, 2001 | Farkas, Hradský, et al., 1992 | Kuo and Ho, 1992 | Kuo and Ho, 1992, 2 |
Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
Column type | Capillary | Capillary |
---|---|---|
Active phase | OV-1 | OV-1 |
Column length (m) | 183. | 183. |
Carrier gas | N2 | |
Substrate | ||
Column diameter (mm) | 0.762 | |
Phase thickness (μm) | ||
Tstart (C) | 0. | 0. |
Tend (C) | 230. | 230. |
Heat rate (K/min) | 1. | 1. |
Initial hold (min) | ||
Final hold (min) | ||
I | 888. | 887. |
Reference | Schreyen, Dirinck, et al., 1976 | Schreyen, Dirinck, et al., 1976, 2 |
Comment | MSDC-RI | MSDC-RI |
References
Go To: Top, Van Den Dool and Kratz RI, non-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.
Bredie, Mottram, et al., 2002
Bredie, W.L.P.; Mottram, D.S.; Guy, R.C.E.,
Effect of temperature and pH on the generation of flavor volatiles in extrusion cooking of wheat flour,
J. Agric. Food Chem., 2002, 50, 5, 1118-1125, https://doi.org/10.1021/jf0111662
. [all data]
Whitfield and Mottram, 2001
Whitfield, F.B.; Mottram, D.S.,
Heterocyclic volatiles formed by heating cysteine or hydrogen sulfide with 4-hydroxy-5-methyl-3(2H)-furanone at pH 6.5,
J. Agric. Food Chem., 2001, 49, 2, 816-822, https://doi.org/10.1021/jf0008644
. [all data]
Farkas, Hradský, et al., 1992
Farkas, P.; Hradský, P.; Kovác, M.,
Novel flavour components identified in the steamn distillate of onion (Allium cepa L.),
Z. Lebensm. Unters. Forsch., 1992, 195, 5, 459-462, https://doi.org/10.1007/BF01191718
. [all data]
Kuo and Ho, 1992
Kuo, M.-C.; Ho, C.-T.,
Volatile constituents of the distilled oils of Welsh onions (Allium fistulosum L. variety Maichuon) and scallions (Allium fistulosum L. variety Caespitosum),
J. Agric. Food Chem., 1992, 40, 1, 111-117, https://doi.org/10.1021/jf00013a021
. [all data]
Kuo and Ho, 1992, 2
Kuo, M.-C.; Ho, C.-T.,
Volatile constituents of the solvent extracts of Welsh onions (Allium fistulosum L. variety Maichuon) and scallions (A. fistulosum L. variety caepitosum),
J. Agric. Food Chem., 1992, 40, 10, 1906-1910, https://doi.org/10.1021/jf00022a036
. [all data]
Schreyen, Dirinck, et al., 1976
Schreyen, L.; Dirinck, P.; van Wassenhove, F.; Schamp, N.,
Analysis of leek volatiles by headspace condensation,
J. Agric. Food Chem., 1976, 24, 6, 1147-1152, https://doi.org/10.1021/jf60208a023
. [all data]
Schreyen, Dirinck, et al., 1976, 2
Schreyen, L.; Dirinck, P.; van Wassenhove, F.; Schamp, N.,
Volatile flavor components of leek,
J. Agric. Food Chem., 1976, 24, 2, 336-341, https://doi.org/10.1021/jf60204a056
. [all data]
Notes
Go To: Top, Van Den Dool and Kratz RI, non-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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