With advances in analytical precision by multicollector inductively coupled plasma mass spectrometry, K and Mg isotopes are increasingly used as a combined tool in tracing sources and processes in geoscientific research. However, reported methods in the literature require at least two column separation procedures during sample purification, which is time-consuming (at least two days). Therefore, a single column procedure could improve efficiencies, and these efforts are necessary to extend the combined application of K and Mg isotopes as geological tracers. In this study, a simple and time-efficient chromatographic procedure was reported, utilizing a single column for quantitative separation of both K and Mg from sample matrices for high-precision isotopic measurement of K and Mg. Using this novel method, the results for international geological standards agreed with published values, verifying the robustness of the procedure. The popularization of this optimized procedure would potentially extend the combined application of K and Mg isotopes in geological studies.

随着多接收器电感耦合等离子体质谱法分析精度的提高，K 和 Mg 同位素越来越多地用作地球科学研究中追踪来源和过程的组合工具。然而，文献中报道的方法在样品纯化过程中需要至少两个柱分离程序，这很耗时（至少两天）。因此，单柱程序可以提高效率，这些努力对于扩展 K 和 Mg 同位素作为地质示踪剂的联合应用是必要的。在本研究中，报告了一种简单且省时的色谱程序，利用单根色谱柱从样品基质中定量分离 K 和 Mg，以实现 K 和 Mg 的高精度同位素测量。使用这种新颖的方法，国际地质标准的结果与公布的值一致，验证了程序的稳健性。这种优化程序的推广可能会扩展 K 和 Mg 同位素在地质研究中的联合应用。