This work summarizes the methodical capabilities, improvements, and new developments in the radiocarbon laboratory of the accelerator mass spectrometry (AMS) facility at the University of Cologne, Germany, which was established in 2010. During the past years, the laboratory has specialized in the analysis of small and gaseous samples. We thus, recently installed a second ion source dedicated for radiocarbon (14C) analysis of CO2 samples at our 6 MV Tandetron AMS from High Voltage Engineering Europe B.V. that is coupled with the gas injection system from Ionplus and an EuroVector EA 3000 elemental analyzer. This work summarizes all pretreatment methods and analytical facilities established in our laboratory during the last years including 14C analysis of individual organic compounds and of CO2 trapped on molecular sieves. We also report different blank values including our long-term blank since 2011, which is for normal-sized, solid samples (650–1000 µg C) 0.0012 ± 0.0004 F14C (54,305 ± 2581 yr BP, n = 484). The precision obtained for modern samples measured as graphite is 0.5% and for gaseous samples injected with the GIS ≤2%.

中文翻译：

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CologneAMS 放射性碳实验室目前的样品制备和分析能力

这项工作总结了 2010 年成立的德国科隆大学加速器质谱 (AMS) 设施的放射性碳实验室的系统能力、改进和新发展。在过去几年中，该实验室专门从事小样品和气体样品的分析。因此，我们最近安装了第二个专门用于放射性碳的离子源（14C) CO 分析2来自 High Voltage Engineering Europe BV 的 6 MV Tandetron AMS 与 Ionplus 的气体喷射系统和 EuroVector EA 3000 元素分析仪耦合。这项工作总结了我们实验室在过去几年中建立的所有预处理方法和分析设施，包括14单个有机化合物和 CO 的 C 分析2被分子筛困住。我们还报告了不同的空白值，包括我们自 2011 年以来的长期空白，它适用于正常大小的固体样品 (650–1000 µg C) 0.0012 ± 0.0004 F14C（54,305 ± 2581 年 BP，n = 484）。以石墨形式测量的现代样品的精度为 0.5%，而使用 GIS 注入的气态样品的精度为 ≤2%。