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Use of laser spectroscopy to measure the 13C/12C and 18O/16O compositions of carbonate minerals


Barker, SLL and Dipple, GM and Dong, F and Baer, DS, Use of laser spectroscopy to measure the 13C/12C and 18O/16O compositions of carbonate minerals, Analytical Chemistry, 83, (6) pp. 2220-2226. ISSN 0974-7419 (2011) [Refereed Article]


Copyright Statement

copyright 2011 American Chemical Society

DOI: doi:10.1021/ac103111y


The stable carbon and oxygen isotope compositions of carbonate minerals are utilized throughout the earth and environmental sciences for various purposes. Here, we demonstrate the first application of a prototype instrument, based on off-axis integrated cavity output laser spectroscopy, to measure the carbon and oxygen isotope composition of CO2 gas evolved from the acidification of carbonate minerals. The carbon and oxygen isotope ratios were recorded from absorption spectra of 12C16O16O, 13C16O16O, and 12C16O18O in the near-infrared wavelength region. The instrument was calibrated using CaCO3 minerals with known δ13CVPDB and δ18OVSMOW values, which had been previously calibrated by isotope ratio mass spectrometry relative to the international isotopic standards NBS 18 and NBS 19. Individual analyses are demonstrated to have internal precision (1 SE) of better than 0.15 for δ13C and 0.6 for δ18O. Analysis of four carbonate standards of known isotopic composition over 2 months, determined using the original instrumental calibration, indicates that analyses are accurate to better than 0.5 for both δ13C and δ18O without application of standard−sample−standard corrections.

Item Details

Item Type:Refereed Article
Keywords:carbonate, mineral, isotope, OA-ICOS, CRDS, d13C, d18O, laser spectroscopy
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Analytical spectrometry
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Barker, SLL (Dr Shaun Barker)
ID Code:129314
Year Published:2011
Web of Science® Times Cited:39
Deposited By:CODES ARC
Deposited On:2018-11-22
Last Modified:2018-12-07
Downloads:75 View Download Statistics

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