Isotope characterized

Dudd, S. N. (1999) Molecular and isotopic characterization of animal fats in archaeological pottery. PhD Thesis, University of Bristol. 

Grosbois C, Negrel Ph, Fouillac C, Grimaud D (2000) Dissolved load of the Loire River chemical and isotopic characterization. Chem Geol 170 179-201... 

Dynamic SIMS is used for depth profile analysis of mainly inorganic samples. The objective is to measure the distribution of a certain compound as a function of depth. At best the resolution in this direction is < 1 nm, that is, considerably better than the lateral resolution. Depth profiling of semiconductors is used, for example, to monitor trace level elements or to measure the sharpness of the interface between two layers of different composition. For glass it is of interest to investigate slow processes such as corrosion, and small particle analyses include environmental samples contaminated by radioisotopes and isotope characterization in extraterrestrial dust. 

Ericson, J.E. (1985). Strontium isotope characterization in the study of prehistoric human ecology. Journal of Human Evolution 14 503-514. 

Although carbon isotopic measurements of bulk organic material can be very informative, much more information can be obtained from the isotopic characterization of specific compound classes or individual organic compounds isolated from bulk material. Such compound-specific isotope analyses (CSIA) can target individual molecules known to be associated primarily with specific processes (e.g., photosynthesis) or with specific sources. 

Zhang C, Liu S, Phelps TJ, Cole DR, Horita J, Fortier SM, Elless M, Valley JW (1997) Physiochemical, mineralogical, and isotopic characterization of magnetite-rich iron oxides formed by thermophilic iron-reducing bacteria. Geochim Cosmochim Acta 61 4621-4632... 

Ader M, Coleman ML, Doyle SP, Stroud M, Wakelin D (2001) Methods for the stable isotopic analysis of chlorine in chlorate and perchlorate compounds. Anal Chem 73(20) 4946-4950 Ben Othman D, White WM, Patchett J (1989) The geochemistry of marine sediments, island arc magma genesis, and crust-mantle recycling. Earth Planet Sci Lett 94 1-21 Beneteau KM, Aravena R, Frape SK (1999) Isotopic characterization of chlorinated solvents-laboratory and field results. Organic Geochemistry 30(8A) 739-753... 

Coleman ML, Eggenkamp HGM, Aranyossy JF (2001) Chlorine stable isotope characterization of solute transport in mudrocks, ANDRA. Actes des Jounces Scientifiques EDP Sciences, France, p 155-175 Curie I (1921) Sur le poids atomique du chloe dans quelques mineraux. CR Acad Sci (Paris) 172 1025-1028 Deruelle B, Dreibus G, Jambon A (1992) Iodine abundances in oceanic basalts implications for Earth dynamics. Earth Planet Sci Lett 108 217-227... 

Kerridge JF, Chang S, Shipp R (1987) Isotopic characterization of kerogen-hke material in the Murchison carbonaceous chondrite. Geochim Cosmochim Acta 51 2527-2540 Kharaka YK, Berry FAF, Friedman I (1974) Isotopic composition of oil-field brines from Kettle-man North Dome, California and their geologic implications, Geochim Cosmochim Acta 37 1899-1908... 

Kim KR, Craig H (1990) Two isotope characterization of N2O in the Pacific Ocean and constraints on its origin in deep water. Nature 347 58-61... 

Huss, G. R. and Smith, J. A. (2007) Titanium isotopes in isotopically characterized silicon carbide grains from the Orgueil Cl chondrite. Meteoritics and Planetary Science, 42, 1055-1075. 

Isotopic characterization SI3C and SD values, asphaltene in bitumen samples, 146, 148/ 149/... 

Paerl, H.W., and Fogel, M.L. (1994) Isotopic characterization of atmospheric nibogen inputs as sources of enhanced primary production in coastal Atlantic Ocean waters. Mar. Biol. 119, 635-645. 

Stark, A., Abrajano, T., Hellou, J., and Metcalf-Smith, J.L. (2003) Molecular and isotopic characterization of polycyclic aromatic hydrocarbon distribution and sources at the international segment of the St. Lawrence River. Org. Geochem. 34, 225-237. 

All chemicals used were free by mass spectrometric criterion of any significant impurities. Isotopically labeled compounds were purchased or prepared see references (8) and (JO for their isotopic characterization. 

Paerl, H. W., and Fogel, M. L. (1994). Isotopic characterization of atmospheric nitrogen inputs as sources of enhanced primary production in coastal Atlantic Ocean waters. Mar. Biol. 119, 635—645. Paerl, H. W., Dennis, R. L., and Whitah, D. R. (2002). Atmospheric deposition of nitrogen Implications for nutrient over-enrichment of coastal waters. Estuaries 25, 677—693. 

MacGregor, B. J., Bruchert, V., Fleischer, S., and Amann, R. (2002). Isolation of smaH-subunit rRNA for stable isotopic characterization. Environ. Microbiol. 4, 451—464. 

At the first sight, this model is supported by the isotopic characterization (Nd-Sr-Pb-O-S) of the corundum and diamond pseudomorph-bearing garnet pyroxenites from Beni Bousera by Pearson et al. (1991a,b, 1993), which indicates a derivation from hydrothermafly altered oceanic crust... 

Lu-Hf isotope systematics provide an important complement to Sm-Nd in the study of the cmst and mantle (e.g., Patchett et al., 1981 Salters and Hart, 1991 Vervoort and Blichert-Toft, 1999). In the crustal context, Lu-Hf is extremely important because of the —1% hafnium content of zircon, and the consequent ability to isotopically characterize the hafnium within grains that have been U-Pb dated (Patchett et al., 1981 Corfu and Stott, 1996 Vervoort et al., 1996 Amelin et al., 1999). However, the Lu-Hf isotopic system is currently overshadowed by a controversy over the decay constant. For many years, a value for the Lu decay constant of 1.94 X 10 yr, based on the eucrite meteorite isochron of Patchett and Tatsumoto (1980) and Tatsumoto et al. (1981) was used. More recent physical determinations reviewed by Begemann et al. (2001) have high dispersion, but do not seem to corroborate the 1.94 X 10 value. At the present time, there is a discrepancy between values based on U-Pb-dated terrestrial Precambrian REE-rich minerals, such... 

It was against this background that the present authors, in collaboration with George Gehrels, initiated neodymium isotopic characterization of the Canadian Cordillera, beginning with the... 

Samson S. D., Patchett P. J., McGlelland W. G., and Gehrels G. E. (1991a) Nd isotopic characterization of metamorphic rocks in the Goast Mountains, Alaskan and Ganadian Gordillera ancient crust bounded by juvenile terranes. Tectonics 10, 770-780. 

Martens C. S., Kelley C. A., Chanton J. P., and Showers W. J. (1992b) Carbon and hydrogen isotopic characterization of methane from wetlands and lakes of the Yukon-Kushokwim Delta, Western Alaska. J. Geophys. Res. 97, 16689-16701. 

Isotopic Characterization of Humic Colloids and Other Organic and Inorganic Dissolved Species in Selected Groundwaters from Sand Aqnifers at Gorleben, Germany... 

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