Laser Ablation - Collision Cell - Multi-Collector Inductively Coupled Plasma Mass Spectrometer

最新型号的多收集器电感耦合等离子体质谱仪，当配备新开发的碰撞(气体反应)池和纳秒激光烧蚀源时，将能够精确和准确地测量大量元素的同位素比值。到目前为止，使用这些技术只能以有限的精度分析钙、钾或铬等元素。拜罗伊特大学地球科学系拜耶里斯地质研究所和环境地球化学组的研究人员利用行星、实验和环境样品的同位素组成回答了有关地球起源、形成和表面过程的基本科学问题。我们将测量长寿命和短寿命的放射性同位素系统，以获得地球和来自小行星、月球和火星的行星物质的高分辨率形成和演化史，从而约束太阳系和行星的起源及其撞击历史。我们还将测量非传统金属稳定同位素系统的同位素分馏特征，这些特征可用作行星和岩浆过程的示踪剂，以及与氧化还原敏感微量元素的金属形态有关的环境指标。激光烧蚀源将能够对天然和地外物质中的矿物颗粒进行原位同位素测量，以及在华大基因著名的高压设施的实验中产生的小相的同位素测量。因此，这些新的质谱学设施将使拜罗伊特大学的实验行星学小组和环境科学小组能够在同位素地球化学方面开展合作研究。建立这些最先进的分析设施将使拜罗伊特大学处于天然和实验样品金属同位素研究的前沿，以更好地了解地球从宜居表面到核心的起源、形成和演化。

The latest models of multi-collector inductively coupled plasma mass spectrometer, when equipped with a newly-developed collision (gas reaction) cell and a nanosecond laser ablation source, will enable the precise and accurate measurements of isotope ratios of a large number of elements. Up to now, elements such as Ca, K or Cr could only be analysed with limited precision using these techniques. Researchers from the Bayerisches Geoinstitut and Environmental Geochemistry group of the Geoscience Department at the University of Bayreuth answer fundamental scientific questions about Earth’s origin, formation and surface processes using the isotopic compositions of planetary, experimental and environmental samples. We will measure long-lived and short-lived radiogenic isotope systems to obtain high-resolution formation and evolution histories of Earth and planetary materials from asteroids, Moon, and Mars, and thereby constrain the origin of the Solar System and planets and their impact histories. We will also measure the isotope fractionation signatures of non-traditional metal stable isotopic systems, which can be used as tracers of planetary and magmatic processes and as environmental proxies associated with metal speciation of redox-sensitive trace elements. The laser ablation source will enable in-situ isotopic measurements of mineral grains in natural and extra-terrestrial materials, and of small phases created in experiments at the renowned high-pressure facility at BGI. These new mass spectrometry facilities will therefore enable collaborative research in isotope geochemistry between the experimental planetology and environmental science groups at the University of Bayreuth. Establishing these state-of-the-art analytical facilities will place the University of Bayreuth at the forefront of metal isotope research in natural and experimental samples to better understand the origin, formation, and evolution of Earth, from its habitable surface to its core.