Measurement of silicon stable isotope natural abundances via multicollector inductively coupled plasma mass spectrometry (MC-ICP-MS)
Measurement of silicon stable isotope natural abundances via multicollector inductively coupled plasma mass spectrometry (MC-ICP-MS)
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DOI：
10.1029/2002gc000310
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发表时间：
2002-08-02
影响因子：
3.5
通讯作者：
De la Rocha, CL
中科院分区：
文献类型：
--
作者：
De la Rocha, CL
[1] 硅同位素比变化（δ(29)Si 和 δ(30)Si）作为地球化学和古海洋学示踪剂的广泛利用受到分析危险性的阻碍，分析需要使用氟化气体。多接收器电感耦合等离子体质谱 (MC-ICP-MS) 提供了一种更安全的硅同位素分析方法。高背景、长冲洗和进样时间以及干扰是重大困难。解决这些障碍是可能的，并且 delta(29)Si 的测量可以达到平均 +/- 0.1 千分之几的精度。 δ(30)Si 由于质量 30 处的 NO 干扰而无法直接测量，可以从理论推导和经验验证的关系 δ(30)Si = 1.93δ(29)Si 推断。通过 MC-ICP-MS 测量的生物材料（海绵骨针和硅藻）产生的 delta(30)Si 值在先前通过氟化方法对类似样品进行分析的预期范围内。
[1] Widespread utilization of silicon isotope ratio variations (delta(29)Si and delta(30)Si) as a geochemical and paleoceanographic tracer has been hampered by the hazardous nature of the analysis, which requires the use of a fluorinating gas. Multicollector inductively coupled plasma mass spectrometry (MC-ICP-MS) provides a safer means of silicon isotope analysis. High backgrounds, long rinsing and sample introduction times, and interferences are significant difficulties. It is possible to work around these obstacles, and the measurement of delta(29)Si may be done to a precision averaging +/- 0.1parts per thousand. The delta(30)Si, which cannot be measured directly due to a NO interference at mass 30, may be extrapolated from the theoretically derived and empirically verified relationship, delta(30)Si = 1.93delta(29)Si. Biological materials (sponge spicules and diatoms) measured via MC-ICP-MS yielded delta(30)Si values in the ranges expected from the prior analysis of similar samples by the method of fluorination.