Gas chromatographic-mass

The high temperatures in the MHD combustion system mean that no complex organic compounds should be present in the combustion products. Gas chromatograph/mass spectrometer analysis of radiant furnace slag and ESP/baghouse composite, down to the part per biUion level, confirms this behef (53). With respect to inorganic priority pollutants, except for mercury, concentrations in MHD-derived fly-ash are expected to be lower than from conventional coal-fired plants. More complete discussion of this topic can be found in References 53 and 63. 

Method 1613 of US Environmental Protection Agency (US EPA) was used for the PCDD detection in the objects of environment (water, soil etc.). PCDD detection was done with the help of Polaris Q gas chromatograph/ mass spectrometer on mass-spectrum of electronic impact in the MS-MS mode. Division of isomer PCDD was carried out on a capillary column from the sintered quartz DB-5 MS (60 m x 0,25 mm, thickness of tape 0,25 p.m). The same device was used for detection of fungicides formulations active ingredients in soil. 

GAS CHROMATOGRAPHIC - MASS SPECTROMETRIC DETERMINATION OF INORGANIC HYDRIDES, PERMANENT GASES AND HYDROCARBONS IN HIGH PURITY SILANE... 

Some detectors can give additional information about the elutes (the eluted solutes). One example is the gas chromatograph—mass spectrometer (GC-MS), which produces a mass spectrum of each compound as well as its mass and location in the chromatogram. This powerful means of detection can be used when standard samples are not available to help determine the identities of the solutes. A beam of ions bombards each compound as it emerges from the chromatograph. The compound breaks up into ions of different masses, providing a spread of narrow peaks instead of one peak for each compound. The relative amount of each fragment is determined and used to help identify the compound. 

A chemist treats toluene (methylbenzene) with chlorine in the presence of a metal catalyst. A sample of the reaction mixture is injected into a GC-MS unit (gas chromatograph-mass spectrometer). One of the compounds that is separated... 

MAZUR W, FOTSIS T, WAHALA K, OJALA S, SALAKKA A and ADLERCREUTZ H (1996) Isotope dilution gas chromatographic-mass spectrometric method for the determination of isoflavonoids, coumestrol and lignans in food samples. Biochem. 233 (2) 169-80. 

Alissandrakis, E., Tarantalis, P. A., Harizanis, P. C., and Polissiou, M. (2007). Aroma investigation of untfloral Greek citrus honey using solid-phase microextraction coupled to gas chromatographic-mass spectrometric analysis. Food Chem. 100, 396-404. 

Terrab, A., Vega-Perez, J. M., Diez, M. J., and Heredia, F. J. (2002). Characterization of northwest Moroccan honeys by gas chromatographic mass spectrometric analysis of their sugar components. /. Sci. Food Agric. 82,179-185. 

Glass screw-cap autosampler vial, 2-mL, with Teflon-lined septum Fisons MD-800 gas chromatograph/mass spectrometer or equivalent MassLynx Software, Version 2... 

Detector wavelength Injection volume Retention time for fenoxycarb Gas chromatograph/ mass spectrometer Column... 

A reasonable throughput screening equipment consisting of six parallel reactor tubes was constructed. The system operates continuously and can be used for screening of various catalysts, different particle sizes and temperatures. Gas, gas-sohd and gas-solid-liquid applications are possible. The screening equipment is coupled to gas chromatographic-mass spectrometric analysis. The constraction principles, the equipment as well as the application of the equipment is demonstrated with three-phase catalytic systems. 

Comparative Evaluation of Related Compounds. Structural studies are incomplete, but NMR and gas chromatographic - mass spectroscopic analysis of a component (fraction 7) isolated by HPLC indicated biphenyl characteristics (30). In an attempt to evaluate the cytolytic effect of compounds with similar structure, 4-hydroxybiphenol and 2-hydroxybiphenol were tested for lytic effects on P. brevis. Bioassays of 2- and 4-hydroxybiphenol indicated that both compounds were cytolytic to P. brevis (31). 

Benchekroun, Y., Desage, M., Ribon, B., and Brazier, J.L., Gas chromatographic-mass spectrometric quantition of tri-, di- and monomethylxanthines and uric acid from hepatocyte incubation media, J. Chromatogr., 532,261,1990. 

FMC. 1975. Gas chromatographic-mass spectral assay of Kronitex isopropylphenyl phosphates. Technical report no. CPG-75-10. FMC Corporation, Princeton, NJ. 

Aronson, J. L., T. J. Schitt, R. C. Walter, M. Taieb, J. J. Tiercelin, D. C. Johnson, C. W. Naeser, and A. E. M. Naim (1976), New geochronologic and palaeomagnetic data from the hominid bearing hadar formation of Ethiopia, Nature Hoi, 323-327. Arpino, P, J. P. Moreau, C. Oruezabal, and E. Flieder (1977), Gas chromatographic-mass spectrometric analysis of tannin hydrolysates from the ink of ancient manuscripts (XI to XVI centuries), /. Chromatogr. 134, 433-439. 

Copley, M. S., H. A. Bland, P. Rose, M. Horton, and R. P. Evershed (2005), Gas chromatographic, mass spectrometric and stable carbon isotopic investigations of organic residues of plant oils and animal fats employed as illuminants in archeological lamps from Egypt, Analyst 130, 860-871. 

Carlier, J. P. Sellier, N. Gas chromatographic-mass spectral studies after methyla-tion of metabolites produced by some anaerobic bacteria in spent media. J. Chro-matogr. 1989, 493, 257-273. 

Moss, C. W. Dees, S. B. Identification of microorganisms by gas chromatographic-mass spectrometric analysis of cellular fatty acids. J. Chromatogr. 1975, 112, 594-604. 

Greaves et al. [74] used a selected ion-monitoring assay method for the determination of primaquine in plasma and urine using gas chromatography-mass spectrometric method and a deuterated internal standard. After freeze-drying and extraction with trichloroethylene, the sample plus internal standard was reacted with Tri Sil TBT (a 3 3 2 by volume mixture of trimethylsilylimidazole, A/O-bis-(trimethylsilylacetamide and trimethylchlorosilane) and an aliquot injected to the gas chromatograph-mass spectrometer. The gas chromatographic effluent was monitored at m/z 403, and m/z 406, the molecular ions of the bis-tetramethylsilane ethers of primaquine and 6-trideuteromethoxy primaquine. 

P. Agozzino, G. Avellone, I.D. Donato, F. Filizzola, Mass spectrometry for cultural heritage knowledge gas chromatographic/mass spectrometric analysis of organic remains in Neolithic potsherds, Journal of Mass Spectrometry, 36, 443 444 (2001). 

Casoli A., Musini P.C., Palla G., Gas chromatographic mass spectrometric approach to the problem of characterizing binding media in paintings, Journal of Chromatography A, 1996,731, 237 246. 

A. Casoli, P.C. Musini, G. Palla, Gas Chromatographic Mass Spectrometric Approach to the Problem of Characterizing Binding Media in Paintings, Journal of Chromatography, A, 731, 237 246 (1996). 

G. Chiavari, D. Fabbri and S. Prati, Gas chromatographic mass spectrometry analysis of products arising from pyrolysis of amino acid in the presence of hexamethyldisilazane, J. 

I. Bonaduce, H. Brecoulaki, M.P. Colombini, A. Lluveras, V. Restivo and E. Ribechini, Gas chromatographic mass spectrometric characterisation of plant gums in samples from painted works of art, J. Chromatogr., A, 1175, 275 282 (2007). 

D. Scalarone, O. Chiantore and C. Riedo, Gas chromatographic/mass spectrometric analysis of on line pyrolysis silylation products of monosaccharides, J. Anal. Appl. Pyrol., 83, 157 164 (2008). 

Chian et al. [69] point out that the Bellar and Iichtenberg [65] procedure of gas stripping followed by adsorption onto a suitable medium and subsequent thermal desorption onto a gas chromatograph-mass spectrometer is not very successful for trace determinations of volatile polar organic compounds such as the low molecular weight alcohols, ketones, and aldehydes. To achieve their required sensitivity of parts per billion, Chian et al. [69] carried out a simple distillation of several hundred ml of sample to produce a few ml of distillate. This achieved a concentration factor of between 10 and 100. The headspace gas injection-gas chromatographic method was then applied to the concentrate obtained by distillation. 

Yu, Y., T.L. Wade, J. Fang, S. McDonald, and J.M. Brooks. 1995. Gas chromatographic-mass spectrometric analysis of polycyclic aromatic hydrocarbon metabolites in Antarctic fish (Notothenia gibberifrons) injected with Diesel Fuel Arctic. Arch. Environ. Contam. Toxicol. 29 241-246. 

POOL, W.G., LEEUW, J.W., VAN DE GRAAF, B.J., Automated extraction of pure mass spectra from gas chromatographic/mass spectrometric data, J. Mass Spectrom., 1997,32,438-443. 

NING, C., KUHARA, T INOUE, Y, ZHANG, C.H., MATSUMOTO, M., SHINKA, T., FURUMOTO, T., YOKOTA, K., MATSUMOTO, I., Gas chromatographic mass spectrometric metabolic profiling of patients with fatal infantile mitochondrial myopathy with De Toni-Fanconi-Debre syndrome, Acta Paediatrica Japonica, 1996,38,661-666. 

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