High-precision measurements of 17O/16O and 18O/16O of O2 and O2/Ar ratio in air
High-precision measurements of 17O/16O and 18O/16O of O2 and O2/Ar ratio in air
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DOI：
10.1002/rcm.1267
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发表时间：
2003-01-01
影响因子：
2
通讯作者：
Luz, B
中科院分区：
文献类型：
--
作者：
Barkan, E;Luz, B
本文介绍了一种高精度、高准确度的质量流量计测量三种氧同位素比值和O-2/Ar比值的方法。它涉及从空气中分离O-2-Ar混合物，并包括一个全自动系统，确保高度可靠的样品处理。大气氧的重复测量产生的重复性（+/-SE x t，平均值的标准误差（n = 12）乘以学生t因子，95%置信限）分别为0.004、0.003和0.2ppm（δ 18）O、δ 17 O和δ O（2）/Ar）。版权所有（C）2003约翰威利父子有限公司。
A method for high-precision and high-accuracy mass spectometric measurements of the ratios among the three oxygen isotopes, and of the O-2/Ar ratio, is presented. It involves separation of the O-2-Ar mixture from air and includes a fully automated system that ensures highly reliable sample processing. Repeated measurements of atmospheric oxygen yield the repeatability (+/-SE x t, standard error of the mean (n = 12) multiplied by Student's t-factor for a 95% confidence limit) of 0.004, 0.003 and 0.2parts per thousand for delta(18)O, delta(17)O and deltaO(2)/Ar, respectively. Copyright (C) 2003 John Wiley Sons, Ltd.