An inductively coupled plasma tandem mass spectrometry (ICP‐MS/MS) instrument can be developed to determine ⁸⁷Sr/⁸⁶Sr ratios with an external precision better than 0.05% relative standard deviation (RSD) in “mass shift” mode without prior Sr purification. Previous studies suggested using CH₃F, N₂O, and SF₆ as reaction gases for this method because a better reaction rate can be achieved with Sr⁺ than with O₂ in the reaction cell. However, these gases are not commonly used in general chemistry laboratories, and processes using these gases are difficult to implement quickly due to regulations. We aim to develop a rapid method that can be applied to many samples for the accurate determination of ⁸⁷Sr/⁸⁶Sr isotope ratios with precision below 0.1% RSD (or approximately to the fourth decimal place).

中文翻译：

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无需事先纯化Sr的O2模式使用电感耦合等离子体串联质谱法测定的岩石中87Sr / 86Sr同位素比

可开发出电感耦合等离子体串联质谱（ICP-MS / MS）仪器，无需事先纯化Sr，即可在“质量偏移”模式下测定⁸⁷ Sr / ⁸⁶ Sr比，其外部精度优于0.05％相对标准偏差（RSD） 。以前的研究建议将CH ₃ F，N ₂ O和SF ₆用作该方法的反应气体，因为Sr ⁺可以获得比O ₂更高的反应速率在反应池中 但是，这些气体在一般化学实验室中并不常用，并且由于法规的限制，使用这些气体的过程难以快速实施。我们旨在开发一种可用于许多样品的快速方法，以准确测定⁸⁷ Sr / ⁸⁶ Sr同位素比，其精密度低于RSD的0.1％（或近似到小数点后第四位）。