Development of ICP Magnetic Sector Multicollector Mass Spectrometry

9406248 Halliday该合同为密歇根大学地质科学系开发电感耦合等离子体磁扇形多收集器质谱仪的相关人员费用提供资金。该仪器结合了非常高效的等离子体电离和多收集器磁扇形质谱的精度的优点。密歇根大学的仪器是世界上同类仪器中的第一个，通过该奖项支持的分析化学家将协助首席研究员和同事充分利用仪器的功能。具体来说，该人员将协助开发样品化学制备的新方法，了解激光烧蚀中涉及的化学形态，以及等离子体中影响传输、分子干扰、电离效率、质量鉴别和基质效应的过程的影响。该仪器和技术开发的科学应用包括自然流体包裹体的同位素研究、高精度Rb-Sr地质年代学、硫化物的In-Sn地质年代学、小样本的U-Th不平衡定年以及大气颗粒的Lu-Hf同位素地球化学。＊＊＊

9406248 Halliday This award provides funding for personnel costs associated with the development of a prototype inductively- coupled plasma magnetic sector multicollector mass spectrometer to be operated in the Department of Geological Sciences at the University of Michigan. The instrument combines the advantages of very efficient plasma ionization with the precision of multicollector magnetic sector mass spectrometry. The University of Michigan instrument is the first of its kind in the world, and the analytical chemist that will be supported through this award will assist the Principal Investigator and colleagues in exploiting the full capabilities of the instrument. Specifically, the person will assist in developing new methods of chemical preparation of samples, understanding the chemical speciation involved in laser ablation and the effects of the processes acting within the plasma that affect transmission, molecular interferences, ionization efficiency, mass discrimination, and matrix effects. The scientific applications for which this instrument and technique development is intended include isotopic studies of natural fluid inclusions, high precision Rb-Sr geochronology, In-Sn geochronology of sulfides, U-Th disequilibirum dating of small samples, and Lu-Hf isotope geochemistry of atmospheric particulates. ***