期刊
LIMNOLOGY AND OCEANOGRAPHY-METHODS
卷 19, 期 6, 页码 431-440出版社
WILEY
DOI: 10.1002/lom3.10435
关键词
-
资金
- Research Council of Norway through its Centre of Excellence funding scheme for CAGE Centre for Arctic Gas Hydrate, Environment and Climate [223259]
- Aker BP
- Programma Giovani Ricercatori Rita Levi Montalcini
Two miniaturized extraction chromatography protocols were tested for strontium isolation, both of which accurately determined Sr isotope ratios and allowed the detection of natural variations in marine pore waters. Protocol 2, with significantly lower cost compared to previous methods, is particularly suitable for large-scale oceanological and limnological studies.
We tested two miniaturized extraction chromatography protocols for strontium isolation based on 300 mu L (Protocol 1) and 30 mu L (Protocol 2) column volumes of Sr-Spec resin, for the simultaneous determination of Sr-87/Sr-86 and delta Sr-88/86 by MC-ICP-MS. The accuracy and precision of the Sr isotope ratios have been evaluated by analyzing JCt-1 and SRM 1640a reference materials, resulting in a reproducibility of Sr-87/Sr-86 and delta Sr-88/86 values of 0.000026 and 0.04 parts per thousand (Protocol 1) (2SD, n = 3), and of 0.000074 and 0.13 parts per thousand (Protocol 2) (2SD, n = 4), respectively. The Sr isotopic composition of SRM 1640a, presented here for the first time, is Sr-87/Sr-86 = 0.708790 +/- 0.000062 and delta Sr-88/86 = 0.07 +/- 0.10 parts per thousand (2SD, n = 6). Protocols 1 and 2 were successfully applied to pore waters extracted from marine sediment cores from the northern Barents Sea. Our results demonstrate that both protocols attain accurate Sr-87/Sr-86 ratios and allow the detection of natural variations in delta Sr-88/86 in marine pore waters. Compared to previous Sr/matrix separation methods, Protocol 2 is significantly less costly, making it particularly suitable for large-scale oceanological and limnological studies.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据