Organic geochemical research analytics of the petroleum industry: enhanced data density and method flexibility using gas chromatograph multiple detector coupling

2018 ◽  
Vol 484 (1) ◽  
pp. 97-106 ◽  
Author(s):  
M. Doerner ◽  
U. Berner ◽  
M. Erdmann ◽  
T. Barth
Keyword(s):  
Natural Gas ◽  
Stable Carbon Isotopes ◽  
Petroleum Industry ◽  
Gas Composition ◽  
Analytical Instrument ◽  
Stable Carbon ◽  
Gas Chromatograph ◽  
Data Density ◽  
Analytical System ◽  
Multiple Detectors

AbstractIn traditional organic geochemical investigations analyses are usually segmented in rather time-consuming single working steps that also require off-line preparation for each analytical instrument which can add to analytical bias. Since industry laboratories need to be precise, as well as cost- and time-efficient, we present a flexible and modular analytical concept which enables the user to perform advanced organic geochemical methods on a single gas chromatograph coupled to multiple detectors. The coupled analytical system can perform analyses of natural gas composition up to n-butane, stable carbon isotopes of natural gas compounds up to n-butane, identification and quantification of major compounds in oils and extracts, and compound-specific isotopes of oil and extracts. The analytical methodologies are appropriate for enhancement to broaden the application spectrum of coupled detectors.

THERMAL ALTERATION OF PRECAMBRIAN MICROFOSSILS: APPLICATIONS TO THE STUDY OF STABLE CARBON ISOTOPES ON THE EARLY EARTH

2020 ◽  
Author(s):  
Jeffrey Osterhout ◽  
◽  
J. William Schopf ◽  
Anatoliy B. Kudryavtsev ◽  
K.D. McKeegan
Keyword(s):  
Carbon Isotopes ◽  
Stable Carbon Isotopes ◽  
Early Earth ◽  
Stable Carbon ◽  
Thermal Alteration

Carbonization of Carbonates and Fractionation of Stable Carbon Isotopes in a Dynamic Slip Zone

2020 ◽  
Vol 58 (9) ◽  
pp. 981-993
Author(s):  
Yu. A. Morozov ◽  
V. S. Sevastianov ◽  
A. Yu. Yurchenko ◽  
O. V. Kuznetsova
Keyword(s):  
Carbon Isotopes ◽  
Stable Carbon Isotopes ◽  
Slip Zone ◽  
Stable Carbon ◽  
Dynamic Slip

Drought signals inferred from ring-width and stable carbon isotope chronologies from Thuja occidentalis trees growing at their northwestern distribution limit, central Canada

2012 ◽  
Vol 42 (3) ◽  
pp. 517-531 ◽  
Author(s):  
Robert Au ◽  
Jacques C. Tardif
Keyword(s):  
Tree Ring ◽  
Tree Rings ◽  
Stable Carbon Isotopes ◽  
Stable Carbon Isotope ◽  
Ring Width ◽  
Ring Formation ◽  
Moisture Regime ◽  
Stable Carbon ◽  
Thuja Occidentalis ◽  
Central Canada

Stable carbon isotopes (δ13C) fixed in tree rings are dependent upon environmental conditions. Old northern white-cedar ( Thuja occidentalis L.) trees were sampled at their northwestern limit of distribution in central Canada. The objectives of the study were (i) to investigate the association between tree-ring δ13C values and radial growth in addition to the response of these variables to climate, (ii) to assess site differences between two sites varying in moisture regime, and (iii) to compare tree-ring δ13C of T. occidentalis with that of other boreal tree species growing at the northern limit of their distribution in central Canada. Over 2500 tree rings comprised of 15 T. occidentalis trees were analyzed for δ13C. Annually resolved δ13C (1650–2006) and ring-width (1542–2006) chronologies were developed. During the year of ring formation, ring width was associated with spring and early-summer conditions, whereas δ13C was more indicative of overall summer conditions. However, compared with δ13C values, ring width was more often associated with climate conditions in the year prior to ring formation. Conditions conducive to moisture stress were important for both parameters. Although ring width and δ13C corresponded to the drought intervals of the 1790s, 1840s, 1890s, 1930s, and 1960–1970, ring width may be more responsive to prolonged drought than δ13C. Tree-ring δ13C could, however, provide important information regarding physiological adaptations to drought.

Using Stable Carbon Isotopes to Distinguish Wild from Captive Wolves

2011 ◽  
Vol 18 (3) ◽  
pp. 253-264 ◽  
Author(s):  
Roland Kays ◽  
Robert S. Feranec
Keyword(s):  
Carbon Isotopes ◽  
Stable Carbon Isotopes ◽  
Stable Carbon

Dehalogenation of α-hexachlorocyclohexane by iron sulfide nanoparticles: Study of reaction mechanism with stable carbon isotopes and pH variations

2021 ◽  
pp. 149672
Author(s):  
Silviu-Laurentiu Badea ◽  
Diana-Ionela Stegarus ◽  
Violeta-Carolina Niculescu ◽  
Stanica Enache ◽  
Amalia Soare ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Carbon Isotopes ◽  
Stable Carbon Isotopes ◽  
Iron Sulfide ◽  
Stable Carbon ◽  
Ph Variations

Prospects and problems of using the methods of geochemistry of stable carbon isotopes in soil studies

2008 ◽  
Vol 41 (3) ◽  
pp. 265-275 ◽  
Author(s):  
E. G. Morgun ◽  
I. V. Kovda ◽  
Ya. G. Ryskov ◽  
S. A. Oleinik
Keyword(s):  
Carbon Isotopes ◽  
Stable Carbon Isotopes ◽  
Stable Carbon

The dynamics of organic matter in soil size and density fractions traced by stable carbon isotopes

2003 ◽  
Vol 22 (2) ◽  
pp. 179-184 ◽  
Author(s):  
Liu Qiming ◽  
Wang Shijie ◽  
Piao Hechun ◽  
Ouyang Ziyuan
Keyword(s):  
Organic Matter ◽  
Carbon Isotopes ◽  
Stable Carbon Isotopes ◽  
Stable Carbon ◽  
Density Fractions
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