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在反应容器中化银酸盐,用于三重氧同位素分析

Jordan A G Wostbrock¹, Drake Yarian¹, Isabella Chiaravalloti¹

¹Department of Earth and Planetary Sciences, Yale University, New Haven, Connecticut, USA.

Rapid communications in mass spectrometry : RCM

|January 15, 2026

概括

这项研究标准化了使用化剂对酸盐的三氧同位素测量. 引入了新的银酸盐标准,以改善地质化学研究中的实验室间校准和准确性.

科学领域:

地质化学地质化学
同位素分析的分析.
分析化学分析化学

背景情况:

实验室越来越多地测量酸盐的三氧同位素值.
在同位素分析中,标准化对于可靠的实验室间结果至关重要.

研究的目的:

为一套银酸盐标准提供三重氧同位素值 (δ17O, δ18O, Δ'17O).
将这些值与以前报告的数据进行比较,并引入新的校准标准.

主要方法:

银酸盐样本 (2-3毫克) 在反应容器中化.
氧气 (O2) 用Thermo MAT 253质谱仪对配 δ17O-δ18O值进行了分析.
用化测量的 Δ'17O 和TC/EA 分析的 δ18O 来校正 δ17O 值.

主要成果:

提供了NBS120c,USGS80,USGS81,AGLox和B2207银酸盐标准的δ17O,δ18O和Δ'17O值.
引入了两个新的银酸盐分销标准.
报告的酸银的 Δ'17O 误差为 10 per meg,根据使用酸盐标准对VSMOW2-SLAP2 尺度进行校准.

结论:

一套银酸盐标准,报告了三重氧同位素值,可用于实验室间校准.
使用反应容器的化方法适用于其他实验室.
准确的 Δ'17O 测量只需要小样本大小 (2-3 毫克) 与通过 TC-EA 的 δ18O 分析相结合.

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