Gas Chromatography of Trimethylsilyl Derivatives of Compounds Related to Chloramphenicol.

1963 ◽  
Vol 35 (11) ◽  
pp. 1580-1582 ◽  
Author(s):  
P. D. Shaw
Keyword(s):  
Gas Chromatography ◽  
Trimethylsilyl Derivatives ◽  
Derivatives Of

scholarly journals Gas-Chromatographic Determination of the Trimethylsilyl Derivatives of Polyhydric Alcohol Humectants in Tobacco and in Tobacco Smoke

1971 ◽  
Vol 6 (2) ◽  
Author(s):  
N. Carugno ◽  
S. Rossi ◽  
G. Lionetti
Keyword(s):  
Gas Chromatography ◽  
Mass Spectra ◽  
Triethylene Glycol ◽  
Chromatographic Determination ◽  
Flame Ionization ◽  
Trimethylsilyl Derivatives ◽  
Gas Chromatographic Method ◽  
Derivatives Of ◽  
Quantitative Procedure

AbstractA qualitative and quantitative procedure has been developed for the determination of humectants in manufactured tobacco by gas-chromatographic method with a flame ionization detector. It consists of extraction with methanol, concentration of the extract and treatment with Tri-Sil reagents. The operating gas-chromatographic conditions are set forth. Samples of tobacco containing glycerine, propylene glycol, diethylene glycol, triethylene glycol, 1-3 butylene glycol and sorbitol have been analysed with recoveries, for the first five ones, in the range of 95-104 %. In order to verify that each chromatographic peak corresponded to the relative glycol, with no interference by other silylated compounds, the mass spectra were obtained through the combination of gas-chromatography with mass spectrometry. The results achieved confirm, as far as tobacco is concerned, that the procedure is accurate and precise. The same method for the determination of humectants was extended to cigarette smoke. Even though this involves morecomplicated problems, as compared to tobacco, because of the presence of silylated compounds, it was found that, for certain glycols, the gas-chromatography of the trimethyl derivatives can be also used as a method of analysis. The mass spectra of some polyhydric alcohols are shown

Gas chromatography and mass spectrometry of some trimethylsilyl derivatives of urinary glucuronides

1974 ◽  
Vol 57 (1) ◽  
pp. 173-189 ◽  
Author(s):  
J.E. Mrochek ◽  
W.T. Rainey
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Trimethylsilyl Derivatives ◽  
Derivatives Of

Further studies on the differentiation of Clostridium sordellii from Clostridium bifermentans by gas chromatography

1970 ◽  
Vol 16 (11) ◽  
pp. 1071-1078 ◽  
Author(s):  
John B. Brooks ◽  
V. R. Dowell ◽  
D. C. Farshy ◽  
A. Y. Armfield
Keyword(s):  
Gas Chromatography ◽  
The Other ◽  
Gas Liquid Chromatography ◽  
Carbohydrate Composition ◽  
Whole Cells ◽  
Cultural Medium ◽  
Urease Production ◽  
Clostridium Bifermentans ◽  
Trimethylsilyl Derivatives ◽  
Derivatives Of

Amines produced by 31 strains of the Clostridium bifermentans and C. sordellii groups were compared by examining trifluoroaceticanhydride derivatives of basic chloroform extracts from spent cultural medium by gas–liquid chromatography (g.l.c.). All of the urease-positive strains (16) exhibited an amine profile consistent with that of C. sordellii. On the other hand, 12 of 15 urease-negative strains produced amine g.l.c. patterns like that of C. bifermentans, and three strains produced amine patterns identical with that of C. sordellii. The carbohydrate composition of some of the strains was determined by g.l.c. of trimethylsilyl derivatives of acid-digested formamide extracts of whole cells. Two of the three urease-negative strains with amine profiles like C. sordellii had a carbohydrate composition similar to that of C. sordellii, and the other strain had a carbohydrate profile more like that of C. bifermentans. One known strain of C. bifermentans had a carbohydrate profile with characteristics of both C. bifermentans and C. sordellii. The results of this study point out the variability of urease production by C. sordellii and the value of gas chromatography in differentiating this organism from C. bifermentans.

scholarly journals Gas Chromatography of Trifluoroacetyl Derivatives of Alditols and Trimethylsilyl Derivatives of Aldonolactones

1968 ◽  
Vol 16 (7) ◽  
pp. 1383-1387 ◽  
Author(s):  
MICHIO MATSUI ◽  
MASASHI OKADA ◽  
TOSHIO IMANARI ◽  
ZENZO TAMURA
Keyword(s):  
Gas Chromatography ◽  
Trimethylsilyl Derivatives ◽  
Derivatives Of

Preparation of trimethylsilyl derivatives of ribonucleosides for gas chromatography

1985 ◽  
Vol 348 ◽  
pp. 280-285 ◽  
Author(s):  
E. Csató ◽  
P. Keresztes ◽  
L.D. Szabó ◽  
D. Knausz
Keyword(s):  
Gas Chromatography ◽  
Trimethylsilyl Derivatives ◽  
Derivatives Of

Trace Analysis of Phenols in Water by Gas Chromatography

1975 ◽  
Vol 32 (2) ◽  
pp. 292-294 ◽  
Author(s):  
Derek A. J. Murray
Keyword(s):  
Gas Chromatography ◽  
Lower Limit ◽  
Water Samples ◽  
Trace Analysis ◽  
Organic Material ◽  
Limit Of Detection ◽  
Internal Standard ◽  
Low Concentrations ◽  
Trimethylsilyl Derivatives ◽  
Derivatives Of

A method for analysis of low concentrations of phenols, cresols, and xylenols in water samples was developed. O-xylene was added to the sample as an internal standard and the sample was extracted once with chloroform to remove a portion of the total organic material present. The trimethylsilyl derivatives of the phenols were formed and analysis completed by gas chromatography. The method was rapid and required a minimum of sample manipulation. The lower limit of detection was 0.100 mg/liter for phenol, 0.025 mg/liter for cresols, and 0.050 mg/liter for xylenols.

Separation of various Frankia strains in the Alnus and Elaeagnus host specificity groups using sugar analysis

1987 ◽  
Vol 33 (9) ◽  
pp. 764-772 ◽  
Author(s):  
L. St-Laurent ◽  
J. Bousquet ◽  
L. Simon ◽  
M. Lalonde
Keyword(s):  
Gas Chromatography ◽  
Host Specificity ◽  
Host Plants ◽  
Sugar Content ◽  
Statistical Analyses ◽  
Myrica Gale ◽  
Trimethylsilyl Derivatives ◽  
Derivatives Of ◽  
Respective Host

To confirm the role of glycosides in the taxonomy of Frankia, 79 strains initially isolated from Alnus spp., Myrica spp., Comptonia sp., Elaeagnus spp., Shepherdia spp., and Hippophaë sp. host plants were tested for relative sugar content after 2 and 8 weeks of growth. Gas chromatography was used to separate the trimethylsilyl derivatives of sugars present in whole-cell hydrolysates of the Frankia strains; six sugars were quantitatively analyzed including 2-O-methyl-D-mannose, a sugar ubiquitous in the genus Frankia. The separation of the Frankia strains into their appropriate host specificity group (Alnus or Elaeagnus), based only on the sugar content, was achieved using statistical analyses of observations at 2 and 8 weeks. All statistical analyses correlated together and showed a significant separation between both host specificity groups. 2-O-Methyl-D-mannose, the concentration of which varied greatly between the Alnus and Elaeagnus host specificity groups, was the most discriminant sugar. Moreover, it was constant at both ages. From discriminant analysis, the separation of the various Frankia strains tested into their respective host specificity group was more precise at 2 weeks with a classification success of 97%, as compared with 78% at 8 weeks. The Myrica gale isolates that nodulated host plants from both host specificity groups were generally intermediate in their sugar content between the Alnus and Elaeagnus host specificity groups.

Implications of Monosaccharides in Sticky Cotton Processing

1976 ◽  
Vol 46 (5) ◽  
pp. 374-380 ◽  
Author(s):  
C. W. Roberts ◽  
H. S. Koenig ◽  
R. G. Merrill ◽  
P. S. R. Cheung ◽  
H. H. Perkins
Keyword(s):  
Gas Chromatography ◽  
Analytical Method ◽  
Reducing Sugars ◽  
Cotton Fibers ◽  
Processing History ◽  
Trimethylsilyl Derivatives ◽  
Growing Conditions ◽  
Derivatives Of ◽  
Semiquantitative Method ◽  
Soluble Components

The analytical method for gas chromatography of trimethylsilyl derivatives of the water-surfactant-soluble components and/or natural contaminants of cotton fibers was refined and utilized. Results of this semiquantitative method support the findings that content of reducing sugars is correlated with “stickiness” of cotton, and that growing conditions, processing history, and maturity of cotton directly affect the components present and their concentrations.

Analysis of trimethylsilyl derivatives of carbohydrates by gas chromatography and mass spectrometry

1969 ◽  
Vol 91 (7) ◽  
pp. 1728-1740 ◽  
Author(s):  
Don C. DeJongh ◽  
T. Radford ◽  
Jeremy D. Hribar ◽  
Stephen Hanessian ◽  
M. Bieber ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Trimethylsilyl Derivatives ◽  
Derivatives Of
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