scholarly journals Determining the stable isotope ratio of total dissolved inorganic carbon in lake water by GC/C/IIRMS

1995 ◽  
Vol 40 (5) ◽  
pp. 994-1000 ◽  
Author(s):  
Toshihiro Miyajima ◽  
Yoshihiro Miyajima ◽  
Yuko T. Hanba ◽  
Koichi Yoshii ◽  
Tadatoshi Koitabashi ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Lake Water ◽  
Isotope Ratio ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Stable Isotope Ratio ◽  
Total Dissolved Inorganic Carbon

scholarly journals Technical note: Coupling infrared gas analysis and cavity ring down spectroscopy for autonomous, high-temporal-resolution measurements of DIC and <i>δ</i><sup>13</sup>C–DIC

2017 ◽  
Vol 14 (5) ◽  
pp. 1305-1313 ◽  
Author(s):  
Mitchell Call ◽  
Kai G. Schulz ◽  
Matheus C. Carvalho ◽  
Isaac R. Santos ◽  
Damien T. Maher
Keyword(s):  
Temporal Resolution ◽  
Isotope Ratio ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Stable Isotope Ratio ◽  
Small Sample ◽  
High Temporal Resolution ◽  
Precision Data ◽  
Simple Method ◽  
Cavity Ring Down

Abstract. A new approach to autonomously determine concentrations of dissolved inorganic carbon (DIC) and its carbon stable isotope ratio (δ13C–DIC) at high temporal resolution is presented. The simple method requires no customised design. Instead it uses two commercially available instruments currently used in aquatic carbon research. An inorganic carbon analyser utilising non-dispersive infrared detection (NDIR) is coupled to a Cavity Ring-down Spectrometer (CRDS) to determine DIC and δ13C–DIC based on the liberated CO2 from acidified aliquots of water. Using a small sample volume of 2 mL, the precision and accuracy of the new method was comparable to standard isotope ratio mass spectrometry (IRMS) methods. The system achieved a sampling resolution of 16 min, with a DIC precision of ±1.5 to 2 µmol kg−1 and δ13C–DIC precision of ±0.14 ‰ for concentrations spanning 1000 to 3600 µmol kg−1. Accuracy of 0.1 ± 0.06 ‰ for δ13C–DIC based on DIC concentrations ranging from 2000 to 2230 µmol kg−1 was achieved during a laboratory-based algal bloom experiment. The high precision data that can be autonomously obtained by the system should enable complex carbonate system questions to be explored in aquatic sciences using high-temporal-resolution observations.

scholarly journals TECHNICAL NOTE: Coupling infrared gas analysis and cavity ring down spectroscopy for autonomous, high temporal resolution measurements of DIC and δ<sup>13</sup>C-DIC

2016 ◽  
Author(s):  
Mitchell Call ◽  
Kai G. Schulz ◽  
Matheus C. Carvalho ◽  
Isaac R. Santos ◽  
Damien T. Maher
Keyword(s):  
Temporal Resolution ◽  
Isotope Ratio ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Stable Isotope Ratio ◽  
Small Sample ◽  
High Temporal Resolution ◽  
Precision Data ◽  
Simple Method ◽  
Cavity Ring Down

Abstract. A new approach to autonomously determine concentrations of dissolved inorganic carbon (DIC) and its carbon stable isotope ratio (δ13C-DIC) at high temporal resolution is presented. The simple method requires no customised design. Instead it uses two commercially available instruments currently used in aquatic carbon research. An inorganic carbon analyser utilising non-dispersive infrared detection (NDIR) is coupled to a Cavity Ring-down Spectrometer (CRDS) to determine DIC and δ13C-DIC based on the liberated CO2 from acidified aliquots of water. Using a small sample volume of 2 ml, the precision and accuracy of the new method was comparable to standard isotope ratio mass spectrometry (IRMS) methods. The system achieved a sampling resolution of 16 mins, with a DIC precision of ±1.5 to 2 µmol kg−1 and δ13C-DIC precision of ±0.14 ‰ for concentrations spanning 1000 to 3600 µmol kg−1. Accuracy of 0.1 ± 0.06 ‰ based on DIC concentrations ranging from 2000 µmol kg−1 to 2230 µmol kg−1 was achieved during a laboratory-based algal bloom experiment. The high precision data that can be autonomously obtained by the system should enable complex carbonate system questions to be explored in aquatic sciences using high temporal resolution observations.

Stable Isotope Ratio Measurements in Nitrogen and Oxygen Using Raman Scattering

1976 ◽  
Vol 30 (1) ◽  
pp. 64-67 ◽  
Author(s):  
S. D. Bloom ◽  
R. C. Harney ◽  
F. P. Milanovich
Keyword(s):  
Stable Isotope ◽  
Raman Scattering ◽  
Isotope Ratio ◽  
Stable Isotope Ratio ◽  
Isotope Ratio Measurements

Influence of water hydrogen on the hydrogen stable isotope ratio of methane at low versus high temperatures of methanogenesis

2019 ◽  
Vol 128 ◽  
pp. 137-147 ◽  
Author(s):  
Lin Wei ◽  
Zhiye Gao ◽  
Maria Mastalerz ◽  
Arndt Schimmelmann ◽  
Ling Gao ◽  
...  
Keyword(s):  
Stable Isotope ◽  
High Temperatures ◽  
Isotope Ratio ◽  
Stable Isotope Ratio ◽  
Influence Of Water ◽  
Water Hydrogen
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