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An optimal strategy for determining triple oxygen isotope ratios in natural water using a commercial cavity ring-down spectrometer

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Title
An optimal strategy for determining triple oxygen isotope ratios in natural water using a commercial cavity ring-down spectrometer
Other Titles
공동광자감쇠분광기를 이용한 자연상 물의 삼중 산소 동위원소비 측정 최적화 전략
Authors
Kim, Songyi
Han, Changhee
Moon, Jangil
Han, Yeongcheol
Hur, Soon Do
Lee, Jeonghoon
Subject
Geology
Keywords
triple oxygen isotopesCRDSdelta O-17O-17-excessAntarctica snow
Issue Date
2022-10
Citation
Kim, Songyi, et al. 2022. "An optimal strategy for determining triple oxygen isotope ratios in natural water using a commercial cavity ring-down spectrometer". GEOSCIENCES JOURNAL, 26(5): 637-647.
Abstract
Triple oxygen isotope ratios have been increasingly acknowledged as useful hydrological tracers, but measuring both 17O/16O and 18O/16O ratios with meaningful precision has been challenging due to the much lower natural abundance of 17O than 16O and even 18O. In this study, in line with the advancement of laser-based techniques and their growing applications, we demonstrate how to optimize the determination of 17O-excess (Δ17O = ln(δ17O+1) - 0.528 × ln(δ18O+1)) in natural water using a commercial wavelength-scanned cavity ring-down spectrometer (WSCRDS). We particularly focus on how to decide the injection numbers of samples and standard solutions utilized for normalization of sample results to the VSMOW-SLAP reference scale. With a measurement strategy aimed at an uncertainty better than 10 per meg (1σ), the Δ17O of Greenland Ice Sheet Precipitation (GISP) is determined to be 24±9 per meg (n = 104), in agreement with previous literature values. By applying this method to Antarctic glacial ice, it is shown to be useful in detecting the seasonality of Δ17O values in Antarctic precipitation. Our approach represents an underlying analytical method that provides guidelines for determining Δ17O from various types of natural waters.
URI
https://repository.kopri.re.kr/handle/201206/14094
DOI
http://dx.doi.org/10.1007/s12303-022-0009-y
Type
Article
Station
해당사항없음
Indexed
SCIE
Appears in Collections  
2021-2021, Observation and understanding of changes in water stable isotope composition in the polar water cycle (21-21) / Han, Yeongcheol (PE21440)
2015-2016, Precise determination of δ17O in ice and snow samples using cavity ring-down spectroscopy (15-16) / 한영철 (PE15150)
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