scholarly journals Measuring stable isotopes of hydrogen and oxygen in ice by means of laser spectrometry: the Bølling transition in the Dye-3 (south Greenland) ice core

2002 ◽  
Vol 35 ◽  
pp. 125-130 ◽  
Author(s):  
Radboud van Trigt ◽  
Harro A. J. Meijer ◽  
Arny E. Sveinbjörnsdóttir ◽  
Sigfús J. Johnsen ◽  
Erik R.Th. Kerstel
Keyword(s):  
Mass Spectrometry ◽  
Isotope Ratio ◽  
Ice Core ◽  
Isotope Ratio Mass Spectrometry ◽  
Direct Absorption ◽  
Deuterium Excess ◽  
Laser Spectrometry ◽  
O Isotope ◽  
A New Technique ◽  
Better Than

AbstractWe report on the first application of a new technique in ice-core research, based on direct absorption infrared laser spectrometry (LS), for measuring 2H, 17Oand 18O isotope ratios. the data are used to calculate the deuterium excess d (defined as δ2H– 8δ18O) for a section of the Dye-3 (south Greenland) deep ice core around the Bølling transition (14 500 BP). the precision of LS is slightly better than that of most traditional methods for deuterium, but not for the oxygen isotopes. the ability to measure δ17O is new and is used here to improve the precision of the δ18O determination. Still, the final precision for δ18O remains inferior to traditional isotope ratio mass spectrometry (IRMS). Therefore, deuterium excess was calculated from a combination of the LS and IRMS isotope determinations.

scholarly journals Tree xylem water isotope analysis by Isotope Ratio Mass Spectrometry and laser spectrometry: A dataset to explore tree response to drought

Data in Brief ◽  
2020 ◽  
Vol 29 ◽  
pp. 105349
Author(s):  
Simon Damien Carrière ◽  
Nicolas K. Martin-StPaul ◽  
Coffi Belmys Cakpo ◽  
Nicolas Patris ◽  
Marina Gillon ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Isotope Ratio ◽  
Isotope Analysis ◽  
Isotope Ratio Mass Spectrometry ◽  
Laser Spectrometry ◽  
Water Isotope

scholarly journals Validation of the DLW method in Japanese quail at different water fluxes using laser and IRMS

2002 ◽  
Vol 93 (6) ◽  
pp. 2147-2154 ◽  
Author(s):  
R. Van Trigt ◽  
E. R. T. Kerstel ◽  
R. E. M. Neubert ◽  
H. A. J. Meijer ◽  
M. McLean ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Japanese Quail ◽  
Isotope Ratio ◽  
Isotope Ratio Mass Spectrometry ◽  
Theory And Practice ◽  
Doubly Labelled Water ◽  
Evaporative Water ◽  
Laser Spectrometry ◽  
Water Efflux ◽  
Best Fit

In Japanese quail ( Coturnix c. japonica; n = 9), the doubly labeled water (DLW) method (2H, 18O) for estimation of CO2 production (l/day) was validated. To evaluate its sensitivity to water efflux levels ( r H2 Oe ; g/day) and to assumptions of fractional evaporative water loss ( x; dimensionless), animals were repeatedly fed a dry pellet diet (average r H2 Oe of 34.8 g/day) or a wet mash diet (95.8 g/day). We simultaneously compared the novel infrared laser spectrometry (LS) with isotope ratio mass spectrometry. At low r H2 Oe , calculated CO2 production rate exhibited little sensitivity to assumptions concerning x, with the best fit being found at 0.51, and only little error was made employing an x value of 0.25. In contrast, at high r H2 Oe , sensitivities were much higher with the best fit at x = 0.32. Conclusions derived from isotope ratio mass spectrometry and LS were similar, proving the usefulness of LS. Within a threefold range of r H2 Oe , little error in the DLW method is made when assuming one single x value of 0.25 (recommended by Speakman JR, Doubly Labelled Water. Theory and Practice. London: Chapman & Hall, 1997), indicating its robustness in comparative studies.

Coupled Si and O isotope measurements of meteoritic material by laser fluorination isotope ratio mass spectrometry

2019 ◽  
Vol 54 (8) ◽  
pp. 667-675
Author(s):  
Patrick J. A. Hill ◽  
Neil R. Banerjee ◽  
Arshad Ali ◽  
Iffat Jabeen ◽  
Gordon R. Osinski ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Isotope Ratio ◽  
Isotope Ratio Mass Spectrometry ◽  
Laser Fluorination ◽  
O Isotope ◽  
Isotope Measurements

Measurement of 15N and 18O Isotope Abundance of Nitrate Using Denitrifier Method on Tracegas-Isotope Ratio Mass Spectrometry

2013 ◽  
Vol 726-731 ◽  
pp. 1346-1349 ◽  
Author(s):  
Chun Ying Xu ◽  
Yu Zhong Li ◽  
Qiao Zhen Li ◽  
Yi Wei Dong ◽  
Fu Li Fang ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Isotope Ratio ◽  
Isotope Ratio Mass Spectrometry ◽  
Nitrate Contamination ◽  
Nitrate Sources ◽  
Trapping Time ◽  
Animal Wastewater ◽  
Denitrifier Method ◽  
Oxygen Isotopic ◽  
O Isotope

A modified denitrifier method on Tracegas-isotope ratio mass spectrometry (IRMS) was developed to determine the nitrogen and oxygen isotopic compositions of nitrate (NO3-) in water samples. The protocol presented in our previous publication was modified in several aspects. Then, the incubation time, amount of NO3-sample, and effect of trapping time in the Tracegas system were analyzed using the standard reference USGS34. Both δ15N and δ18O values demonstrated accurate and reproducible at incubation times exceeding 12 h or overnight as well as added 0.2 μg to 0.4 μg NO3--N samples. Our data also showed that 100 s for trapping time in Tracegas system was adequate to achieve accurate and reproducible results. Finally, the δ15N and δ18O values of nitrate in animal wastewater were measured using this method. The results indicate that the denitrifier method can be used widely for tracing nitrate sources and controlling nitrate contamination in China.

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