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使用自动化色谱系统从海水中净化铜和的同位素的快速程序

Xiaopeng Bian¹, Shun-Chung Yang¹, Robert J Raad¹

¹Department of Earth Sciences, University of Southern California, Los Angeles, CA, USA.

Analytica chimica acta

|June 4, 2024

概括

一种新的自动化染色学方法从海水中快速净化 (Ni) 和铜 (Cu),用于稳定同位素分析. 这一进步显著加快了海洋生物地球化学中微量金属同位素研究的速度.

科学领域:

海洋学海洋学海洋学
地质化学地质化学
分析化学分析化学

背景情况:

铁,,铜,和等微量金属是植物浮游生物的重要微量营养素,但也可能有毒.
在海水中分析微量金属稳定同位素有助于理解海洋生物地质化学循环.
传统的染色法用于从海水中净化这些金属是复杂和耗时的,限制了样品吞吐量.

研究的目的:

开发一种快速的,自动化的染色学程序,从海水中提取和净化 (Ni) 和铜 (Cu),用于稳定同位素分析.
克服处理大量微量金属同位素样品的传统方法的局限性.

主要方法:

使用prepFAST-MCTM系统进行自动色谱.
开发了一种从海水样本中提取和净化Ni和Cu的新方法.
测试了该程序的矩阵移除效率,恢复率和程序空白.

主要成果:

实现了近乎完全的Ni回收和Cu的定量回收.
报告了Ni (0.33 ± 0.24 ng) 和Cu (0.42 ± 0.18 ng) 的微不足道的程序空白.
获得稳定同位素分析的高精度: δ60Ni的0.07 ‰和 δ65Cu的0.09 ‰ (2 SD),与传统方法相比.

结论:

自动色谱程序显著加快了海水稳定金属同位素分析.
这种方法可以快速准确地分析海水 δ60Ni和 δ65Cu.
该程序显示了适应其他微量金属 (如Fe,Zn和Cd同位素) 净化自动化的潜力.

关键词:

铜铜铜铜铜铜几特拉西斯 (GEOTRACES) 是一个尼克尔尼克尔是什么意思海洋海洋海洋海洋微量金属微量金属微量金属

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