Gas chromatography electron ionization mass

Gas Chromatography/Electron Ionization/High-resolution Mass Spectrometry Gas Chromatography/Electron Ionization/Mass Spectrometry... 

Adamowicz, P., Kala, M. Simultaneous screening for and determination of 128 date-rape drugs in urine by gas chromatography-electron ionization-mass spectrometry. Forensic Sci. Int. 198, 39 5 (2010)... 

The TOE mass analyzer determines the mass of biomolecular samples according to the time required for the ions to travel from the ion source to the detector. It is the most simple and robust mass analyzer, and has practically unlimited mass range. It has a pulsed mode of operation. Because MALDI generates ions in short, nanosecond pulses, TOP analysis works very well with MALDI. TOP analyzers have also been applied to ESI and gas chromatography electron ionization mass spectrometry (GC-MS). 

Hurtado-Femandez, E., Pacchiarotta, T., Longueira-Suirez, E., Mayoboroda, O. A., Femandez-Gutierrez, A., and Carrasco-Pancorbo, A. 2013. Evaluation of gas chromatography-atmospheric pressure chemical ionization-mass spectrometry as an alternative to gas chromatography-electron ionization-mass spectrometry Avocado fruit as example./. Chromatogr.A 1313 228-244. 

Dubey, D.K., et al. (2008) Microsynthesis and gas chromatography/electron ionization mass spectrometric and tandem mass spectrometric analysis of cyclic alkyl-phosphonates for verification of the Chemical Weapons Convention. Rapid Communications in Mass Spectrometry, 22, 2526-2532. 

Thumhofer, S. and Vetter, W., A gas chromatography/electron ionization-mass spectrometry-selected ion monitoring method for determining the fatty acid pattern in food after formation of fattty acid methyl esters, J. Agric. Food Chem., 53, 8896-8903, 2005. 

The combination of chromatography and mass spectrometry (MS) is a subject that has attracted much interest over the last forty years or so. The combination of gas chromatography (GC) with mass spectrometry (GC-MS) was first reported in 1958 and made available commercially in 1967. Since then, it has become increasingly utilized and is probably the most widely used hyphenated or tandem technique, as such combinations are often known. The acceptance of GC-MS as a routine technique has in no small part been due to the fact that interfaces have been available for both packed and capillary columns which allow the vast majority of compounds amenable to separation by gas chromatography to be transferred efficiently to the mass spectrometer. Compounds amenable to analysis by GC need to be both volatile, at the temperatures used to achieve separation, and thermally stable, i.e. the same requirements needed to produce mass spectra from an analyte using either electron (El) or chemical ionization (Cl) (see Chapter 3). In simple terms, therefore, virtually all compounds that pass through a GC column can be ionized and the full analytical capabilities of the mass spectrometer utilized. 

J.J. Jimenez, J.L. Bernal, S. Aumente, M.J. delNozal, M.T. Martin, J. Bernal, Quality assurance of commercial beeswax I. Gas chromatography electron impact ionization mass spectrometry of hydrocarbons and monoesters, Journal of Chromatography A, 1024, 147 154 (2004). 

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

GC-EIMS Gas chromatography coupled to electron ionization mass spectrometry... 

Microwave-assisted extraction coupled with gas chromatography-electron capture negative chemical ionization mass spectrometry (i. e., MAE-GC-EC-NCI-MS) was described for the simplified determination of imidazolinone herbicides in soil at the ppb level [715]. 

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

While the first coupling of gas chromatography and mass spectrometry had been reported in the late fifties [4] one had to wait for almost another 20 years before the direct interfacing of liquid chromatography with mass spectrometry (LC-MS) was described by Arpino et al. [5]. With the direct liquid interface (DLI) the effluent of the chromatographic column was directly introduced in the electron impact source. Contrarily to gas chromatography coupled to mass spectrometry (GC-MS), LC-MS did do not catch on as rapidly. One of the reasons was that the MS interface could only handle LC fiow rates of a few microliters per minute. Another limitation was that electron impact or chemical ionization was not suit-... 

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