Mass spectrometry gas analysis

Authenticity evaluation has recently received increased attention in a number of industries. The complex mixtures involved often require very high resolution analyses and, in the case of determining the authenticity of natural products, very accurate determination of enantiomeric purity. Juchelka et al. have described a method for the authenticity determination of natural products which uses a combination of enantioselective multidimensional gas chromatography with isotope ratio mass spectrometry (28). In isotope ratio mass spectrometry, combustion analysis is combined with mass spectrometry, and the ratio of the analyte is measured versus a... 

Barkley J, Bunch J, Bursey JT, et al. 1980. Gas chromatography mass spectrometry computer analysis of volatile halogenated hydrocarbons in man and his environment. A multimedia environmental study. Biomed Mass Spectrom 7 139-147. 

Docherty, G., Jones, V. and Evershed, R. P. (2001) Practical and theoretical considerations in the gas chromatography/combustion/isotope ratio mass spectrometry 813C analysis of small polyfunctional compounds. Rapid Communications in Mass Spectrometry 15, 730 738. 

Gillson GR, Douglas DJ, Fulford JE, Halligan KW, Tanner SD (1988) Nonspectroscopic interelement interferences in inductively coupled plasma mass spectrometry. Anal Chem 60 1472-1474 Gonfiantini R, Valkiers S, Taylor PDP, De Bievre P (1997) Adsorption in gas mass spectrometry. II Effects on the measurement of isotope amount ratios. Int J Mass Spectrom Ion Proc 171 231-242 Habfast K (1997) Advanced isotope ratio mass spectrometry. I magnetic isotope ratio mass spectrometers. In Modem Isotope Ratio Mass Spectrometry. Chemical Analysis Vol. 145. Platzner IT (ed). John Wiley and Sons, Chichester UK, p 11-82... 

Fujii T. 1977. Direct aqueous injection gas chromatography-mass spectrometry for analysis of organohalides in water at concentrations below the parts per billion level. J Chromatogr 139 297-302. 

The equipment for screening passengers and baggage is designed to identify trace amounts of specific known explosives. Analytic trace detection is conducted using mass spectrometry, gas chromatography, chemical luminescence, or ion mobility spectrometry. Ion mobility spectrometry is most commonly used. Novel explosive material wiU not be probably detected by these systems. Information on the equipment s technical performance is not publicly available because of security reasons, which inhibits an independent analysis of equipment s performance [160]. 

Bromonitromethanes are substantially increased in formation with the use of pre-ozonation before chlorine or chloramine treatment, and concentrations up to 3 pg/L individually have been reported [11,12]. Laboratory-scale formation studies indicate that nitrite may play a role in the formation of the nitro group in these DBFs [40]. Tribromonitromethane (bromopicrin) and other trihalonitromethanes (which include bromodichloro- and chlorodibromonitromethane) require particular analytical conditions for their analysis. These compounds are thermally unstable and decompose under commonly used injection port temperatures during gas chromatography (GC) or GC/mass spectrometry (MS) analysis [41]. 

L. Stromberg and I. Wistedt, Gas chromatography—mass spectrometry. Rapid analysis of methamphetamine, phentermine, N,7V-dimethylamphetamine, n-ethylamphetamine and mephenter-mine in the presence of each other, Microgram, 10 59 (1977). 

Gas Chromatography—Matrix Isolation Infrared Spectroscopy—Mass Spectrometry for Analysis of Thermally Generated Aroma Compounds... 

Capillary Electrophoresis with Flame Photometric Detection Chemical Weapons Convention Extracted Ion Chromatogram Electron Impact Mass Spectrometry Electrospray Ionization Flow Injection Analysis Flame Photometric Detector Gas Chromatography/Fourier Transform Infrared Spectroscopy Gas Chromatography/Mass Spectrometry Gas chromatography International Union for Pure and... 

E.R.J. Wils, Gas chromatography/mass spectrometry in analysis of chemicals related to the chemical weapons convention, Encyclopedia of Analytical Chemistry, John Wiley Sons, Ltd, Chichester, 2000, 979-1001. 

Gas Chromatography/Mass Spectrometry in Analysis of Chemicals Related to the Chemical Weapons Convention... 

Horvat, R.J., McFadden, W.H., Hawkins, N.G., Black, D.R., Lane, W.G., Teeter, R.M. 1965. Volatile products from mild oxidation of methyl linoleate. Analysis by combined mass spectrometry-gas chromatography. J. Am. Oil Chem. Soc. 42, 1112-1115. 

The olefin feed stocks were all commercial grade of >95% purity, used without further purification. Light products mass spectrometry. Liquid analysis was done by gas chromatography and boiling point curves by ASTM method d-2887 (gas chromatography). 

The pyrolysis products were analyzed by using several techniques. The gas samples collected were analyzed by using gas chromatography and mass spectrometry. Elemental analysis and proton NMR and 13C NMR analysis were performed on the initial reactant and the final distillable liquid products. 

This report presents a discussion of recent applications of combined gas chromatography-mass spectrometry to analysis of pesticide residues isolated from human, animal, and environmental media. Emphasis will be placed on analytical techniques, related gas chromatographic column technology, and analysis of fragmentation pathways pertinent to the identification of pesticide residues. 

Williams DT, Tran Q, Fellin P, et al. 1991. Evaluation of gas chromatography-Fourier transform infrared spectroscopy-mass spectrometry for analysis of phenolic compounds. J Chromatog 549(1-2) 297-311. 

Reaction products were identified by Mass Spectrometry quantitative analysis was carried out by Gas Chromatography (GC). 

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