Development of ICP Magnetic Sector Multicollector Mass Spectrometry

9406248韩礼德该奖项为密歇根大学地质科学系开发电感耦合等离子磁扇区多收集器质谱计样机相关的人员费用提供资金。该仪器结合了非常有效的等离子体电离的优点和多收集磁扇形质谱的精确度。密歇根大学的仪器是世界上第一个此类仪器，将通过该奖项获得支持的分析化学家将帮助首席研究员和同事充分利用仪器的全部能力。具体地说，该人员将协助开发新的样品化学制备方法，了解激光烧蚀过程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、质量歧视和基质效应的过程的影响。这项仪器和技术开发的科学应用包括天然流体包裹体的同位素研究、高精度的Rb-Sr年代学、硫化物的In-Sn年代学、小样品的U-Th不平衡测年以及大气颗粒物的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. ***