Measurement of δ18O, δ17O, and 17O-excess in water by off-axis integrated cavity output spectroscopy and isotope ratio mass spectrometry.
Measurement of δ18O, δ17O, and 17O-excess in water by off-axis integrated cavity output spectroscopy and isotope ratio mass spectrometry.
复制标题
DOI：
10.1021/ac402366t
复制
发表时间：
2013-11-05
影响因子：
7.4
通讯作者：
Owano, Thomas
中科院分区：
文献类型：
--
作者：
Berman, Elena S. F.;Levin, Naomi E.;Landais, Amaelle;Li, Shuning;Owano, Thomas
水的稳定同位素长期以来一直被用来增进对水文循环、流域水文学和极地气候的了解。最近，除了 2H 和 18O 之外，人们对测量和使用含量较低的 17O 同位素越来越感兴趣。离轴积分腔输出光谱 (OA-ICOS) 被证明可以准确测量液态水中的 δ18O、δ17O 和 17O 过量。 OA-ICOS 不涉及样本转换并且占地面积小，允许研究人员收集样本进行测量。国际同位素参考水标准GISP的重复（514）次高通量测量证明了OA-ICOS的精密度和准确度：δ18OVSMOW-SLAP =−24.74 ± 0.07 ‰ (1σ) 和δ17OVSMOW-SLAP = −13.12 ± 0.05 ‰ (1σ)。为了进行比较，δ18OVSMOW-SLAP 的 IAEA 值为 −24.76 ± 0.09 ‰ (1σ)，之前报告的 δ17OVSMOW-SLAP 平均值为 −13.12 ± 0.06 ‰ (1σ)。 GISP 的多次 (26) 高精度测量提供 17O-excessVSMOW-SLAP 为 23 ± 10 每兆 (1σ)；先前报道的 17O-excessVSMOW-SLAP 的平均值为 22 ± 11 每兆 (1σ)。对于所有这些 OA-ICOS 测量，可以通过额外平均进一步提高精度。 OA-ICOS 测量结果与两个独立的同位素比质谱 (IRMS) 实验室进行了比较，结果显示其在 δ18O、δ17O 和 17O 过量方面具有与当前氟化-IRMS 技术相当的准确度和精密度。能够以廉价且无需样品转换的方式准确测量液态水中的 δ18O、δ17O 和 17O 过量，预计将大大增加 δ17O 和 17O 过量测量的应用，以科学理解水循环、大气对流和气候建模等。
Stable isotopes of water have long been used to improve understanding of the hydrological cycle, catchment hydrology, and polar climate. Recently, there has been increasing interest in measurement and use of the less-abundant 17O isotope in addition to 2H and 18O. Off-axis integrated cavity output spectroscopy (OA-ICOS) is demonstrated for accurate and precise measurements δ18O, δ17O, and 17O-excess in liquid water. OA-ICOS involves no sample conversion and has a small footprint, allowing measurements to be made by researchers collecting the samples. Repeated (514) high-throughput measurements of the international isotopic reference water standard GISP demonstrate the precision and accuracy of OA-ICOS: δ18OVSMOW-SLAP =−24.74 ± 0.07 ‰ (1σ) and δ17OVSMOW-SLAP = −13.12 ± 0.05 ‰ (1σ). For comparison, the IAEA value for δ18OVSMOW-SLAP is −24.76 ± 0.09 ‰ (1σ) and an average of previously reported values for δ17OVSMOW-SLAP is −13.12 ± 0.06 ‰ (1σ). Multiple (26) high-precision measurements of GISP provide a 17O-excessVSMOW-SLAP of 23 ± 10 per meg (1σ); an average of previously reported values for 17O-excessVSMOW-SLAP is 22 ± 11 per meg (1σ). For all these OA-ICOS measurements, precision can be further enhanced by additional averaging. OA-ICOS measurements were compared with two independent isotope ratio mass spectrometry (IRMS) laboratories and shown to have comparable accuracy and precision as the current fluorination-IRMS techniques in δ18O, δ17O, and 17O-excess. The ability to measure accurately δ18O, δ17O, and 17O-excess in liquid water inexpensively and without sample conversion is expected to increase vastly the application of δ17O and 17O-excess measurements for scientific understanding of the water cycle, atmospheric convection, and climate modeling among others.
登录
查看更多内容
DOI：
10.1109/proc.1966.4634
发表时间：
1966-01-01
期刊：
PROCEEDINGS OF THE INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS
影响因子：
--
作者：
ALLAN, DW
通讯作者：
ALLAN, DW
影响因子：
2
作者：
Lin, Ying;Clayton, Robert N.;Groening, Manfred
通讯作者：
Groening, Manfred
影响因子：
2
作者：
Barkan, Eugeni;Luz, Boaz
通讯作者：
Luz, Boaz
影响因子：
7.4
作者：
Baker, L;Franchi, IA;Pillinger, CT
通讯作者：
Pillinger, CT
影响因子：
2
作者：
Barkan, E;Luz, B
通讯作者：
Luz, B