Quantitative Determination of Methyl Mercaptan, Dimethyl Disulfide, and Dimethyl Sulfide in Gas Mixture

1953 ◽  
Vol 25 (11) ◽  
pp. 1645-1648 ◽  
Author(s):  
William Segal ◽  
R. L. Starkey
Keyword(s):  
Quantitative Determination ◽  
Dimethyl Sulfide ◽  
Dimethyl Disulfide ◽  
Gas Mixture ◽  
Methyl Mercaptan

Quantitative determination of gas mixture composition by gas chromatography—New approach

2001 ◽  
Vol 54 (7-8) ◽  
pp. 541-543
Author(s):  
L. Odochian ◽  
M. Şabliovschi ◽  
M. Dumitraş
Keyword(s):  
Gas Chromatography ◽  
Quantitative Determination ◽  
Mixture Composition ◽  
Gas Mixture ◽  
New Approach

scholarly journals A two-parameter model for the determination of the partition coefficient for TRS in a culture medium

2022 ◽  
Vol 52 (1) ◽  
pp. 15-20
Author(s):  
Javier Silva ◽  
Rodrigo Ortiz ◽  
Samuel Carrasco ◽  
German Aroca
Keyword(s):  
Culture Medium ◽  
Dimethyl Sulfide ◽  
Culture Media ◽  
Dimethyl Disulfide ◽  
Henry's Law ◽  
Henry’S Law ◽  
Extended Uniquac ◽  
Two Parameters ◽  
Two Parameter

A two-parameters model was applied for the determination of the activity coefficient for a culture medium, and compared with Henry's law, the extended UNIQUAC, and experimental data obtained from an experimental setup system, consisting of a liquid culture media Thiobacillus (ATCC 290) with hydrogen sulfide (H2S), dimethyl sulfide (DMS), methyl mercaptan (MM), and dimethyl disulfide (DMDS), respectively.  The ANOVA indicates that the use of Henry's law is not appropriate for MM and H2S with R2adj values of -106.15% and -53.33%, respectively. The extended UNIQUAC model and the two-parameter model were able to describe the system with values of 76.94% and 94.15% for DMS and DMDS in the case of UNIQUAC Extended, respectively, and 88.50% and 98.08% using the two-parameter model.   These results show that the two-parameter model is able to describe the system, using a low number of parameters. However, the extended UNIQUAC shows better results but presenting a high level of over-parameterization. Henry's law showed significant deviations, not being representative of all analyzed cases.  The two-parameter model is presented as an alternative to describing systems in which vapor-liquid mass transfer is involved in culture media, providing a better approximation than traditional models and lower calculation costs than complex models.

scholarly journals Methyl mercaptan and dimethyl disulfide production from methionine by Proteus species detected by head-space gas-liquid chromatography

1977 ◽  
Vol 6 (3) ◽  
pp. 187-194
Author(s):  
N J Hayward ◽  
T H Jeavons ◽  
A J Nicholson ◽  
A G Thornton
Keyword(s):  
Liquid Chromatography ◽  
Dimethyl Disulfide ◽  
Defined Medium ◽  
Automated Detection ◽  
Gas Liquid Chromatography ◽  
Methyl Mercaptan ◽  
Proteus Vulgaris ◽  
Head Space ◽  
Disulfide Production

Head-space gas-liquid chromatography and mass spectrometry were used to detect and identify products formed by Proteus vulgaris, P. mirabilis, P. morganii, and P. rettgeri from a defined medium supplemented with either phenylalanine, methionine, valine, leucine, histidine, lysine, ornithine, threonine, asparagine, aspartic acid, or tryptophan. In a detailed study of the products formed by 68 strains of Proteus spp. from L-methionine, the production of large amounts of both dimethyl disulfide and methyl mercaptan was found to be a characteristic of the genus. Both sulfur products appeared within a few hours of inoculation. Dimethyl disulfide was a more sensitive indicator of growth than the spectrometric determination of optical density. This suggests that it could be useful for the rapid, automated detection of any species of Proteus.

Quantitative determination of longitudinal and transverse cross-relaxation rates

1999 ◽  
Vol 96 (9/10) ◽  
pp. 1608-1615
Author(s):  
T. E. Malliavin ◽  
H. Desvaux ◽  
M. A. Delsuc
Keyword(s):  
Quantitative Determination ◽  
Cross Relaxation ◽  
Relaxation Rates
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