While simultaneous radiocarbon and δ13C measurements have been available for organic materials (by accelerator mass spectrometry, AMS, and isotope ratio mass spectrometry, IRMS, respectively), this has not been possible for carbonates until now. Using an existing interface for gas ion source AMS measurements, we developed a prototype for a universal gas interface that allows simultaneous measurement of both carbon isotope ratios from potentially any source of CO2. First results obtained from reference materials (IAEA-C6, OxaII, PhA, IAEA-C1, IAEA-C2, ETH-4) show that for both organic as well as carbonate samples, the precision of radiocarbon measurements in the coupled mode is comparable to routine standalone AMS measurements. For IRMS δ13C measurements, the performance for different materials shows more variation with precisions ranging from 0.07‰ to 0.47‰. However, both organic materials and carbonates can achieve precisions as good as 0.13‰. Once fully automated, the method shows potential for filling the gap of simultaneous carbon isotope measurements for non-organic materials.

中文翻译：

---

用于同时测量 14C 和 δ13C 的通用气体接口


虽然有机材料可以同时进行放射性碳和 δ13C 测量（分别通过加速器质谱法 AMS 和同位素比质谱法 IRMS），但迄今为止这对于碳酸盐来说还不可能。利用现有的气体离子源 AMS 测量接口，我们开发了通用气体接口原型，允许同时测量任何可能来源的 CO2 的碳同位素比。从参考材料（IAEA-C6、OxaII、PhA、IAEA-C1、IAEA-C2、ETH-4）获得的第一批结果表明，对于有机样品和碳酸盐样品，耦合模式下放射性碳测量的精度与常规独立 AMS 测量。对于IRMS δ13C测量，不同材料的性能表现出更大的差异，精度范围为0.07‰至0.47‰。而有机材料和碳酸盐都可以达到0.13‰的精度。一旦完全自动化，该方法显示出填补无机材料同步碳同位素测量空白的潜力。