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Hydrogen Isotope Analysis

Marino, B.D. and DeNiro, M.J. 1987 Isotopic analysis of archaeobotanicals to reconstruct past climates Effects of activities associated with food preparation on carbon, hydrogen and oxygen isotope ratios of plant cellulose. Journal of Archaeological Science 14 537-548. [Pg.21]

Gehre, M., Hoefling, R., Kowski, P. and Strauch, G. (1996) Sample preparation device for quantitative hydrogen isotope analysis using chromium metal. Analytical Chemistry 68, 4414 4417. [Pg.427]

Tobias, H. J. and Brenna, J. T. (1997) On line pyrolysis as a limitless reduction source for high precision isotopic analysis of organic derived hydrogen. Analytical Chemistry 69, 3148 3152. [Pg.432]

There is only one detailed kinetic study of ruthenium enantioselective hydrogenation, in this case involving (BINAP)Ru(OAc)2, and MAC [65]. The extensive study involved reaction kinetics, isotopic analysis of reaction components and products, and in-situ NMR. The derived catalytic cycle is shown in Figure 31.15, differing from the Bergens studies described above in that the intermediates -both observed and assumed - are neutral rather than cationic. Right up to the formation of the alkylruthenium intermediate, the individual steps are revers-... [Pg.1093]

The importance of oxygen and hydrogen isotope ratios in the water cycle was first demonstrated by Dansgaard (1964), who showed that a simple linear relationship exists between < 180 in precipitation and the average annual air temperature. Through the isotopic analysis of a large number of meteoric water samples (rainfall and surface water) collected at different latitudes, Craig (1961) had previously demonstrated that a simple relationship existed between <5180 and < D in precipitation ... [Pg.171]

A popular solvent for the sample is deuterated chloroform, CDC13. The D is the symbol for deuterium, the isotope of hydrogen that has one proton and one neutron. This solvent has no H nuclei and does not absorb RFs. It will therefore not interfere in the analysis. [Pg.287]

Wang, Y. Huang, Y. Huckins, J.N. Petty, J.D. 2004, Compound-specific carbon and hydrogen isotope analysis of sub-parts per bilUon level waterborne petroleum hydrocarbons. Environ. Sci. Technol. 38 3689-3697. [Pg.214]

Of the isotopes of hydrogen, deuterium can be detected by mass spectrometric analysis of masses 2, 3 and 4 nsing a membrane-inlet mass spectrometer (Fig. 5.4). [Pg.96]

In conclusion, the combination of carbon and hydrogen isotope analysis of natural gases is a powerful tool to discriminate different origins of gases. In a plot of 8 C vs. 8D (see Fig. 3.38) not only is a distinction of biogenic and thermogeiuc gases from different enviromnents clear, but it is also possible to delineate mixtures between the different types. [Pg.189]

Bigeleisen J, Perlman ML, Prosser HC (1952) Conversion of hydrogenic materials for isotopic analysis. Anal Chem 24 1356... [Pg.232]

Coleman ML, Sheppard TJ, Durham JJ, Rouse JE, Moore GR (1982) Reduction of water with zinc for hydrogen isotope analysis. Anal Chem 54 993-995 Connolly CA, Walter LM, Baadsgaard H, Longstaffe F (1990) Origin and evolution of formation fluids, Alberta Basin, western Canada sedimentary basin II. Isotope systematics and fluid mixing. Applied Geochem 5 397 14... [Pg.237]

Horita J (1988) Hydrogen isotope analysis of natural waters using an H2-water equilibration method a special implication to brines. Chem Geol 72 89-94 Horita J (1989) Stable isotope fractionation factors of water in hydrated salt minerals. Earth Planet Sci Lett 95 173-179... [Pg.249]

Pathway of reaction, 1167 consecutive reactions, 1259 definition, 1259 and FTTR spectroscopy, 1259 hydrogen evolution reaction, 1259 isotopic analysis. 1259 mechanism, 1259 parallel reactions, 1259 Permitivity of free space. 875 Perez, 1519... [Pg.46]

Macko, S.A., Estep, M.L., and Lee, W.Y. (1983) Stable hydrogen isotope analysis of food webs on laboratory and field populations of marine amphipods. J. Exp. Mar. Biol. Ecol. 72, 243-249. [Pg.621]

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See also in sourсe #XX -- [ Pg.432 ]



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