Rapid and precise analysis of rare earth elements in small volumes of seawater - Method and intercomparison
Rapid and precise analysis of rare earth elements in small volumes of seawater - Method and intercomparison
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DOI：
10.1016/j.marchem.2016.08.006
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发表时间：
2016-11-20
期刊：
影响因子：
3
通讯作者：
Pahnke, Katharina
中科院分区：
文献类型：
--
作者：
Behrens, Melanie K.;Muratli, Jesse;Pahnke, Katharina
稀土元素被用作海洋微量元素循环的示踪剂。然而，低（皮摩尔水平）溶解稀土元素的浓度和耗时的方法，到目前为止，阻碍了他们在海洋研究中的广泛使用。本研究报告了自动seaFAST-pico系统（Elemental Scientific Inc.）在离线模式下，使用多元素同位素稀释电感耦合等离子体质谱（ID ICP-MS）对少量海水（11-12 mL）中溶解的稀土元素进行稳健快速的预浓缩、纯化和分析。我们的新方法的准确性检查与复制的GEOTRACES互校准海水从BATS（百慕大大西洋时间序列，北大西洋）在15米和2000米的水深。我们的研究结果显示出良好的协议（分析不确定性，2西格玛SD）与发表的intercalibrated值从GEOTRACES intercalibration研究。在3000 m水深处，来自SAFe的GEOTRACES内部校准海水的复制品（铁的取样和分析，北太平洋）表明程序长期误差为
Rare earth elements (REEs) are used as tracers for oceanic trace element cycling. However, the low (picomolar level) dissolved REE concentrations and time-consuming methods have so far hindered their extensive use in marine studies. This study reports the first application of the automated seaFAST-pico system (Elemental Scientific Inc.) in offline mode and using multi-element isotope dilution inductively coupled plasma-mass spectrometry (ID ICP-MS) for the robust and rapid pre-concentration, purification, and analysis of dissolved REEs from small volumes of seawater (11-12 mL). Accuracy of our new method is checked with replicates of GEOTRACES intercalibration seawater from BATS (Bermuda Atlantic Time Series, North Atlantic) at 15 m and 2000 m water depths. Our results show excellent agreement (within the analytical uncertainty, 2 sigma SD) with the published intercalibrated values from the GEOTRACES intercalibration study. Replicates of GEOTRACES inter calibration seawater from SAFe at 3000 m water depth (Sampling and Analysis of Iron, North Pacific) indicate a procedural long-term error of