ARI: Aquisition of a Fisons Plasma 54 Mass Spectrometer for Global Change Research

这项奖励提供资金购买Fisons等离子54质谱仪(MS)，该质谱仪将为各种同位素比率研究提供快速分析和高精度。PI对使用质谱仪测定珊瑚礁样品中大量的U/Th和Sr/Ca比值以及城市环境中的人为铅特别感兴趣。FISONS MS能够极大地提高分析速度，同时保持通常用于分析此类样品的热电离质谱的高精度。此外，电感耦合等离子体源的较高电离温度极大地增加了更难熔元素的电离，从而允许分析许多以前不受这种类型分析影响的元素。对这些样品的分析将有助于我们了解古气候、全球变化和环境污染物。

This award provides funding to purchase a Fisons Plasma 54 mass spectrometer (MS) which will offer rapid analysis and high precision for a variety of isotope ratio studies. The PI's are particularly interested in using the MS for large numbers of U/Th and Sr/Ca ratio determinations in coral reef samples and of anthropogenic Pb in urban environments. The Fisons MS is capable of greatly increasing the speed of analysis, while maintaining the high precision of thermal ionization mass spectrometry which is normally used to analyze such samples. In addition, the ICP source's higher ionization temperature greatly increases the ionization of the more refractory elements, thereby allowing the analysis of many elements that were not susceptible to this type of analysis before. Analysis of these samples will contribute to our understanding of paleoclimates, global change, and environmental contaminants.