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通过微蒸和Nu Plasma 3 MC-ICP-MS进行纳米尺度同位素分析

César Nicolás Rodríguez-Díaz¹, Eduardo Paredes², Leopoldo David Pena²

¹Institut de Ciències del Mar, Consejo Superior de Investigaciones Científicas (CSIC), Passeig Marítim de la Barceloneta, 37-49, 08003 Barcelona, Spain; GRC Geociències Marines, Dept. de Dinàmica de la Terra i de l'Oceà, Facultat de Ciències de la Terra, Universitat de Barcelona, C/Martí i Franquès s/n, 08028 Barcelona, Spain.

|December 8, 2023

概括

本研究提出了使用MC-ICP-MS.在海洋碳酸盐中精确分析同位素 (δ11B) 的简单方法. 优化的程序能够在纳米克尺度上进行准确的测量,这对于重建过去的海洋状况至关重要.

科学领域:

地质化学地质化学
古海洋学是古海洋学.
分析化学分析化学

背景情况:

对海洋碳酸盐的同位素 (δ11B) 分析对于重建过去的海洋pH值和大气pCO2.2至关重要.
多采集器感应合等离子体质谱 (MC-ICP-MS) 为此类分析提供了高吞吐量和电离效率.

研究的目的:

为了评估NU仪器等离子体3MC-ICP-MS的性能,用于δ11B测量.
开发和验证纳米级同位素分析的简单方法.

主要方法:

使用微蒸 (95°C,≥15h) 来从碳酸盐基质中净化,以获得高回收.
测试不同的样品引入系统 (30,50,170μL min-1) 和探测器配置 (FC11/FC12,FC12/IC).
使用经认证的参考材料 (JCt-1,JCp-1,RM 8301,ERM-AE121) 和内部标准进行验证.

主要成果:

实现了与文献最小值相比较的低平均空白值 (14 ± 6 pg).
30μL min-1雾化器系统显示出每块质量的优越信号强度.
FC12/IC探测器配置为低信号 (<0.35V) 提供了准确的结果.
经过验证的方法证明了内部标准的优良长期可重复性.

结论:

开发的方法提供了一个强大而易于采用的方法,用于纳米级的δ11B分析.
这种技术提高了利用海洋档案重建过去海洋学条件的能力.
该研究强调了MC-ICP-MS的有效性,其优化引入和检测系统可用于精确的同位素测量.

关键词:

同位素是的同位素之一.在MC-ICP-MS中,海洋生物的碳酸盐是什么?微蒸是微蒸的一种方法.在古老-pHH时代.

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