Gas chromatography - mass spectro

T. W. M. Fan, A. N. Lane, D. Crowley, and R. M. Higa.shi, Comprehensive analysis of organic ligands in whole root exudates using nuclear magnetic resonance and gas chromatography-mass spectro.scopy. Anal. Biochem. 257 57 (1997). 

Regert M., Investigating the history of prehistoric glues by gas chromatography mass spectro metry, Journal of Separation Science, 2004, 27, 244 254. 

T. Learner, The analysis of synthetic paints by pyrolysis gas chromatography, mass spectro metry (PyGCMS), Stud. Conserv., 46, 225 241 (2001). 

J. de la Cruz Canizares, M.T. Domenech Carbo, J. V. Gimeno Adelantado, R. Mateo Castro and F. Bosch Reig, Study of Burseraceae resins used in binding media and varnishes from artworks by gas chromatography mass spectrometry and pyrolysis gas chromatography mass spectro metry, J. Chromatogr., A, 1093, 177 194 (2005). 

A Curie Point flash evaporation-pyrolysis gas chromatography-mass spectro-metric method [35] has been applied to the determination of polystyrenes in soil via identification and determination of their unzipping pyrolysis products, such as styrene monomer, a-methylstyrene, 3-methylstyrene, 4-methylstyrene, a-3-dimethylstyrene, 3-ethylstyrene, a-4-dimethylstyrene, 3,5-dimethylstyrene, a-2- or 2,5- or 2,4-dimethylstyrene, as well as various phenyl ethers. 

Watanabe et al. used a pyrolysis gas chromatography-mass spectro-metric method for the determination of acetylcholine in human blood... 

Hill, R. H., Jr., G. D. Todd, E. M. Kilboume, et al. 1987. Gas chromatography/mass spectro-metric determination of aniline in food oils associated with the Spanish toxic oil syndrome. Bull. Environ. Contam. Toxicol. 39(3) 511-15. 

Gas Chromatography-Mass Spectro-metric Assay for d-Amphetamine Biomed. Mass Spectrom. 6(5) 187-190 (1979) CA 92 80a... 

Capillary gas chromatography (GC) and gas chromatography-mass spectro-metory (GC-MS). 

M. P. Colombini, F. Modugno, E. Ribechini, Direct exposure electron ionization mass spectro metry and gas chromatography/mass spectrometry techniques to study organic coatings on archaeological amphorae, J. Mass Spectrom., 40, 675 687 (2005). 

Tsuge, K., Seto, Y. (2006). Detection of butyrylcholinesterase-nerve gas adducts by liquid chromatography-mass spectro-metric analysis after in gel chymotryptic digestion. J. Chromatogr. B 838 21-30. 

K. K. Vemia, A. J. H. Louter, A. Jain, E. Pocumll, J. J. Vreuls and U. A. Th Brinkman, On-line solid-phase exti action-gas chromatography-ion cap tandem mass spectro-metiic detection for the nanogram per litre analysis of trace pollutants in aqueous samples , Chromatogmphia44 372-380 (1997). 

Penalver A, Pocurull E, Borrull F, Marce RM (2000) Determination of phthalate esters in water samples by solid-phase microextraction and gas chromatography with mass spectro-metric detection. J Chromatogr A 872(1-2) 191-201... 

Gas or liquid chromatography combined with tandem mass spectro-metry are the methods of choice for unequivocal identification at trace levels. 

V-Nitrosodiethanolamine has been found in many complex matrices such as cutting and grinding fluids and cosmetics. Analysis for V-nitrosodiethanolamine is complicated by the matrix and a clean-up technique with derivatization is typically required before quantitation of the analyte to achieve adequate sensitivity and selectivity. Ammonium sulfamate may be added to the sample to prevent the artifactual formation ofV-nitrosamines. Derivatives of V-nitrosodiethanolamine have been prepared by acylation, trifluoroacylation, trimethylsilylation and methylation. The derivatives have been analysed by gas chromatography using flame ionization and mass spectro-metric detectors (Occupational Safety and Health Administration, 1990). 

Karasek et al. [32] determined hydrocarbons in benzene water extracts (pH 7) of soil and in incinerator or fly ash by a variety of techniques, including gas chromatography with flame ionisation, electron capture and mass spectro-metric detection. Benzene water extractants were adjusted to pH 4, 7 and 10 before the extraction in order to selectively extract various types of acidic and basic organic compounds in addition to hydrocarbons. 

The pyrolysis products were separated by trapping in various low temperature baths and the residual noncondensable gases were pumped into a known volume, where the pressure was measured and samples were taken for mass spectro-metric analysis. Samples of the liquid products could be taken for analysis by both mass spectrometry and gas liquid chromatography (GLC). Samples of materials for identification of products were obtained as follows ... 

There have been several studies of the kinetics of the isomerization and exchange processes undergone by the .-butenes (39, 48, 51) although none is completely satisfactory. Thus for example the analysis of the 2-butenes formed from 1-butene has only been easy since the advent of gas chromatography. There has also been confusion concerning the term exchange reaction (2). There has been as yet no mass-spectro-metric analysis of the isomerized and the reactant olefins separately, and much work clearly remains to be done. In the remainder of this section we draw what conclusions we can from the reported rates and kinetics. 

Gas-chromatography coupled to mass spectrometry (G.C.-M.S.) was carried out on Rexco and Kuwait branched/cyclic fractions with a Pye IOU chromatograph (WCOT glass-capillary column coated with OV-1) on a Varian MAT hh spectrometer (with SS kk computer) at 70 eV ionization voltage. For Turkish Montan wax and asphaltite, G.C.-M.S. were run with the eutectic packed column on an MS 50 spectrometer. Field-desorption (F.D.) M.S. for Kuwait and Rexco samples were recorded on a Varian CH5D spectrometer (calibrated with perfluorkerosene) linked to a Varian Spectro-system 100 data output. 

See also Carbohydrates Overview Sugars - Spectro-photometric Methods. Chromatography Overview. Gas Chromatography Overview Mass Spectrometry Chirai Separations. Ion Exchange Overview Ion Chromatography Instrumentation Ion Chromatography Applications. Liquid Chromatography Overview Normal Phase Reversed Phase Clinical Applications Food Applications. Mass Spectrometry Overview ... 

Bouyssiere B, Szpunar J, and Lobinski R (2002) Gas chromatography with inductively coupled plasma mass spectrometric detection in speciation analysis. Spectro-chima Acta Part B 57 805-828. 

Kim, Y.S. Zhang, H. Kim, H.Y. Profiling neurosteroids in cerebrospinal fluids and plasma by gas chromatography/ electron capture negative chemical ionization mass spectro- 51. metry. Anal. Biochem. 2000, 277, 187-195. 

Earlier studies had indicated aldehyde and ketone formation in the oxidation of ethylene however, later work using mass spectro-graphic analysis and gas chromatography reported no products other than CO2 and water. The coulombic efficiency determinations for the anodic oxidation of other unsaturated hydrocarbons in acid solution indicate that CO2 is the main reaction product (cf. Table 17). For lower olefins, i.e., C2H4 and oxidation is complete. For larger compounds, other products are formed however, the primary product is CO2. A general equation for hydrocarbon electro-oxidation can thus be written as... 

Bicchi, C., C. Frattini, G. Pellegrino, P. Rubiolo, V. Raverdino, and G. Tsoupras, 1992. Determination of sulphurated compounds in Tagetes patula cv. nana essential oil by gas chromatography with mass spectro-metric, Fourier transform infrared and atomic emission spectrometric detection, 609 ... 

The quality control analyses of these chemicals are performed using almost the whole range of trace analysis techniques available. Among the most important are atomic absorption spectrophotometry in all its forms, ICP emission spectrometry, and ICP mass spectroscopy, ion chromatography, gas and liquid chromatography, ultraviolet and visible absorption spectrophotometry, voltammetry, and spectro-fluorimetry. 

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