Gas chromatograph/mass spectrometry

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. 

Kraut-Vass A, Thoma J. 1991. Performance of an extraction disk in synthetic organic chemical analysis using gas chromatograph-mass spectrometry. J Chromatog 538 233-240. 

Lee ML, Prado GP, Howard JB, et al. 1977. Source identification of urban airborne polycyclic aromatic hydrocarbons by gas chromatographic mass spectrometry and high resolution mass spectrometry. Biomed Mass Spectrom 4(3) 182-185. 

The exact synthetic chemistry which produces PAH in a fuel-rich flame is not well known, even today. It is clear, however, that PAH can be produced from almost any fuel burned under oxygen deficient conditions. Since soot is also formed under these conditions, PAH are almost always found associated with soot. As an example of the PAH assemblage produced by combustion systems. Figure 1 shows gas chromatographic mass spectrometry (GCMS) data for PAH produced by the combustion of kerosene ( ). The structures of the major compounds are also given in Figure 1. We draw the reader s attention to a number of features of this PAH mix-... 

Hariri, M. (1974a). Quantitative measurements of endogenous levels of acetylcholine and choline in tetrathyridia of Mesocestoides corti (Cestoda) by means of combined gas chromatograph-mass spectrometry. Journal of Parasitology, 60 227-30. 

Supersonic gas chromatograph-mass spectrometry (GC-MS) apparently has several advantages over standard GS-MS methods for the detection of thermally unstable molecules <2004JCH233>. A GC and MS are interfaced with a supersonic molecular beam (SMB), and activation of cold compounds in the SMB occurs by electron ionization or cluster chemical ionization. The gas flow rate is very high, permitting the elution of compounds that would normally be degraded. Ethylene sulfone was one of the analytes for which the technique was demonstrated. 

Identification of Specific Organic Compounds in a Highly Anoxic Sediment by Gas Chromatographic-Mass Spectrometry and High Resolution Mass Spectrometry... 

Although anhydrous mustard is not a substantial corrosion threat to most metals, hydrolysis forms hydrochloric acid and does contribute to mustard s corrosive behavior. An interesting pmr and gas chromatograph-mass spectrometry (GC-MS) study of the hydrolysis of HD has been reported (Logan and Sartori, 2003). In this work, it was shown that hydrolysis (D2O at 22°C) had a half-life of approximately 7 min, but that in the presence of sodium chloride, the half-life increased to approximately 24 min. These results are consistent with those reported by Bartlett and Swain (1949). 

Smith PA, Kluchinsky TA, Savage PB et al. (2002). Traditional sampling with laboratory analysis and solid phase microextraction sampling with field gas chromatograph/mass spectrometry by military industrial hygienists. Am Ind Hyg Assoc J, 63, 284-292. 

JM Neal, WN Howald, KL Kunze, RF Lawrence, WF Trager. Application of negative-ion chemical ionization isotope dilution gas chromatograph-mass spectrometry to single-dose bioavailability studies of mefloquine. J Chromatogr B 661 263,1994. 

Gas chromatographic/mass spectrometry (GC/MS) results were obtained at the Ohio State University Chemical Instrumentation Center using a Finnigan 4021 GC/MS instrument. Both electron impact and chemical ionization were performed on samples following separation of compounds by a gas chromatograph equipped with capillary columns containing 3% 0V-17 or 5% carbowax 20M. 

Fifty soils and sediments from many areas of the globe have been analyzed for polycyclic aromatic hydrocarbons (PAH) using gas chromatographic mass spectrometry. The results of these analyses indicate that PAH are ubiquitous. The source of most of the PAH in these samples is combustion. The concentrations of PAH are highest in areas of high anthropogenic activity. PAH concentrations relative to distance from anthropogenic point sources also indicate that the major source of PAH in these sediments is attributable to human activity. 

Cocker J, Gristwood W, Wilson HK. 1986. Assessment of occupational exposure to 4,4 -diaminodiphenylmethane (methylene dianiline) by gas chromatograph-mass spectrometry analysis of urine. Br J Ind Med 43(9) 620-625. 

The definitive structural determination of fatty acids usually relies on isolation of adequate quantities of purified compounds (though see such techniques as gas chromatograph/mass spectrometry). Methods for the preliminary fractionation and subsequent purification of fatty acids will be found in Kates (1972), Christie (1982) and Kuksis (1978) (see Section 4). 

Gas chromatograph-mass spectrometry confirmation of drugs Mass spectrometry in the clinical laboratory... 

Patterson, B.W., Zhao, G. and Klein, S., Improved accuracy and precision of gas chromatograph/ mass spectrometry measurements for metabohc tracers. Metabolism, 47, 706-712 (1998). 

A gas chromatographic-mass spectrometry (GC-MS) technique is described for the detection and identification of anabolic steroid drugs in urine samples of athletes competing in major international events. 

Aguilera-Herrador, E., Lucena, R., Cardenas, S. Valcarcel, M., (2008b). Determination of trihalomethanes in waters by ionic liquid-based single drop microextraction/gas chromatographic/mass spectrometry,/ Chromatogr. A Vol. 1209 (No.l-2) 76-82. 

A forensic sample consisting of melt-recrystallised polymers recovered from the scene of a fire in a factory is identified by differential scanning calorimetry. The factory commonly used two kinds of film sheets, A and B, made by different manufacturers. It is necessary to decide whether the forensic sample related to material A or B. The forensic sample and reference samples of materials A and B are subjected to IR spectroscopy and pyrolysis gas chromatograph mass spectrometry measurements, which reveal their PE nature. The thermal behaviour of the samples is examined by differential scanning calorimetry (DSC) and they are found to be blends of two kinds of PEs, LDPE and LLDPE. The samples can be identified and distinguished from each other via the DSC measurements. 6 refs. 

T. G. Hartman, J. Lech, K. Karmas, J. Salinas, R. T. Rosen, and C. T. Ho, Flavor characterization using adsorbent trapping-thermal desorption or direct thermal desorption-gas chromatography and gas chromatograph-mass spectrometry. Flavor Measurement (C. T. Ho and Manley, eds.), Marcel Dekker, Inc., 1993. 

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