Chromatography isotope ratio mass spectrometry

FTICR. Fourier-transform ion cyclotron resonance GC/IRMS. gas chromatography isotope ratio mass spectrometry... [Pg.445]

Figure 14.17 Schematic diagram of the ThermoElectron liquid chromatography isotope ratio mass spectrometry chemical oxidation reactor...

Binnert, C., Laville, M., Pachiaudi, C., Rigalleau, V. and Beylot, M. (1995) Use of gas chromatography isotope ratio mass spectrometry to study triglyceride metabolism in humans. Lipids 30, 869 873. [Pg.424]

Demmelmair, H. and Schmidt, H. L. (1993) Precise 813C determination in the range of natural abundance on amino acids from protein hydrolysates by gas chromatography isotope ratio mass spectrometry. Isotopenpraxis 29, 237 250. [Pg.426]

McCullagh, J. S. O., Juchelka, D. and Hedges, R. E. M. (2006) Analysis of amino acid 13C abundance from human and faunal bone collagen using liquid chromatography/isotope ratio mass spectrometry. Rapid Communications in Mass Spectrometry 20, 2761 2768. [Pg.429]

Nitz, S., Weinreich, B., Drawer F. (1992) Multidimensional gas chromatography-isotope ratio mass spectrometry (MDGC-IRMS) High Resolut. Chromatogr. 15 387-391. [Pg.350]

Capillary Gas Chromatography—Isotope Ratio Mass Spectrometry Techniques 395 Table "VIA IRMS online coupling techniques [52]... [Pg.395]

Lamrini R, Crouzet JR, Francina A, Guilluy R, Steghens JP, Brazier JL (1994) Evaluation of OH radical production using 13C02 gas chromatography-isotope ratio mass spectrometry. Anal Biochem 220 129-136... [Pg.73]

Figure 10.4 Schematic representation of the multidimensional GC-IRMS system developed by Nitz et al. (27) PR1 and PR2, pressure regulators SV1-SV4, solenoid valves NV— and NV+, needle valves FID1-FID3, flame-ionization detectors. Reprinted from Journal of High Resolution Chromatography, 15, S. Nitz et al., Multidimensional gas chromatography-isotope ratio mass spectrometry, (MDGC-IRMS). Part A system description and technical requirements , pp. 387-391, 1992, with permission from Wiley-VCH.

For example, little is known about the isotopic composition of formaldehyde in the atmosphere. Formaldehyde is a chemical intermediate in hydrocarbon oxidation. The carbon (8 C) and hydrogen (8D) isotopic composition of atmospheric formaldehyde is analyzed using continuous flow gas chromatography isotope ratio mass spectrometry." Isotope ratios were measured using GC-IRMS (Finnigan MAT 253 stable isotope ratio mass spectrometer, single-sector field with electron impact ion source and multiple ion collection) with a precision of 1.1 and 50%(lo ) for 8 C and 8D, respectively. The accuracy of the online continuous flow isotope technique was verified by calibrating three aliquots of the gas phase standard via the offline dual inlet IRMS technique. The concentration of formaldehyde in ambient air was determined on IRMS major ion peak areas (i.e., mass 44 for 8 C and mass 2 for 8D)." ... [Pg.220]

Sephton M. and Gilmour 1. (2001a) Pyrolysis-gas chromatography-isotope ratio mass spectrometry of macromolecular material in meteorites. Planet. Space Sci. 49, 465-471. [Pg.291]

Rieley G., Collister J. W., Stern B., and Eglinton G. (1993) Gas chromatography/isotope ratio mass spectrometry of leaf wax n-aUcanes from plants of differing carbon dioxide metabolisms. Rapid Commun. Mass. Spectrom. 7, 488-491. [Pg.3979]

S. Sewenig, U. Hener, A. Mosandl (2003) Online determination of H/ H and C/ C isotope ratios of cinnamaldehyde from different sources using gas chromatography isotope ratio mass spectrometry. Eur Eood Res Technol 217, 444-448... [Pg.656]

C. Ruff, K. Hor, B. Weckerle, T. Konig, P. Schreier (2002) Authenticity assessment of estragole and methyl eugenol by on-line gas chromatography-isotope ratio mass spectrometry. J Agric. Food Chem. 50, 1028-1031... [Pg.658]

V. Karl, A. Dietrich, A. Mosandl (1994) Gas chromatography - isotope ratio mass spectrometry measurements of some carboxylic esters from different apple varieties. Phytochem. Anal. 5, 32-37... [Pg.660]

Roberts, B. J., Russ, M. E., and Ostrom, N. E., Rapid and precise determination of the of dissolved and gaseous dioxygen via gas chromatography-isotope ratio mass spectrometry. Environ. Sci. TechnoL, 34, 2337-2341, 2000. [Pg.259]

Faulharber et al (5,6) and other researchers (7-9) have described how the determination of the isotope values of constituents is of increasing importance, especially in view of the demand for authenticity control and origin determination of essential oils and foods. To determine isotope values, g chromatography-isotope ratio mass spectrometry (GC-IRMS) has been used, although not widely. The present authors (70) have studied the possibility of a more convenient and common means of analysis of isotope values, based on the isotope peak in the mass spectrum of a compound. The present study focuses on the development of a new analytical method for the differentiation of quality in commercial citrus oils of various origins. [Pg.104]

Woodbury, S.E., Evershed, R.P., Rossell, J.B., Griffith, R.E., and Farnell, P. Detection of vegetable oil adulteration using gas chromatography/isotope ratio mass spectrometry. AwaZyficaZ Chemistry, 67, 2685-2690. 1995. [Pg.200]

Stable isotope ratio mass spectrometers that interface directly to a gas chromatograph are commercially available. This type of analysis is known variously as gas chromatography-isotope ratio mass spectrometry (GC-IRMS), gas chromatography-combustion isotope ratio mass spectrometry, or compound-specific isotope analysis. The same principle of operation has also been used for more general isotope ratio analyses, where the components of interest are combusted as bulk samples. This type of arrangement, known as continuous flow-isotope ratio mass spectrometry, allows rapid automated analyses of and... [Pg.2889]

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