A multinebulization technique for the determination of trace metals in a marine biota sample by on-line isotope dilution inductively coupled plasma mass spectrometry (OID-ICP-MS),Journal of Analytical Atomic Spectrometry

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A multinebulization technique for the determination of trace metals in a marine biota sample by on-line isotope dilution inductively coupled plasma mass spectrometry (OID-ICP-MS)
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2020-08-18 , DOI: 10.1039/d0ja00262c
Miriam García _{1,

2,

3,

4,

5} , Miguel Ángel Aguirre _{1,

2,

3,

4,

5} , Emilia Vassileva _{6,

7,

8,

9} , Antonio Canals _{1,

2,

3,

4,

5}

Affiliation

A new concept of a nebulizer (i.e., multinebulizer) has been employed for trace element (e.g., Cd, Cu, Hg, Ni, Pb, and Zn) determination in marine biota samples (e.g., fish sample). To this end, an analytical methodology based on the combination of a multinebulizer with an isotope dilution (ID) calibration strategy and inductively coupled plasma mass spectrometry (ICP-MS) has been proposed. In this way, the on-line isotope dilution (OID) is accomplished by the simultaneous introduction of the liquid samples/standard and the isotopic reference solution (i.e., spike) into the plasma with an efficient mixing between them, which takes place at the inner cavity of the multinebulizer tip. The proposed OID-ICP-MS analytical methodology allows the fast determination of Cd, Cu, Hg, Ni, Pb and Zn in a biota sample certified reference material (CRM) (e.g., IAEA-476) with limits of detection of 0.006, 0.4, 0.09, 30, 0.2 and 4 ng g⁻¹, respectively, and recovery values ranging from 97 to 103%. The primary advantage offered by the proposed analytical methodology is that the time-consuming spiking step in the conventional ID analysis is avoided. This yields savings in both the total time and cost of the analysis per sample. Hence, it has been proved that OID-ICP-MS using a multinebulizer is a promising solution for the trace element analysis of samples with a high matrix content, which simplifies operation and significantly increases sample throughput and productivity.

中文翻译：

在线同位素稀释电感耦合等离子体质谱法（OID-ICP-MS）测定海洋生物样品中痕量金属的多雾化技术

雾化器（即多雾化器）的新概念已用于海洋生物样本（例如鱼样本）中的痕量元素（例如Cd，Cu，Hg，Ni，Pb和Zn）的测定。为此，已经提出了一种基于多雾化器与同位素稀释（ID）校准策略和电感耦合等离子体质谱（ICP-MS）相结合的分析方法。通过这种方式，通过同时引入液体样品/标准品和同位素参考溶液（即（加标）到血浆中，并在两者之间进行有效混合，这发生在多雾化器尖端的内腔中。提议的OID-ICP-MS分析方法可快速测定生物样品样品认证参考物质（CRM）（例如IAEA-476）中的Cd，Cu，Hg，Ni，Pb和Zn ，检测限为0.006、0.4 ，0.09、30、0.2和4 ng g ^-1回收率分别为97％至103％。所提出的分析方法所提供的主要优点是避免了常规ID分析中耗时的加标步骤。这样可以节省总时间和每个样品的分析成本。因此，已证明使用多雾化器的OID-ICP-MS是用于分析基质含量高的样品中痕量元素的有前途的解决方案，它简化了操作并显着提高了样品通量和生产率。

更新日期：2020-08-18

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