Acquisition of a High Resolution ICP-MS to Expand Continuous Ultra-Trace Ice Core and Other Environmental Analyses

3MRI奖支持购买Element2双聚焦HR-ICPMS，以及与现有的ICP仪器并行运行的更多设备。鉴于收集和储存冰芯的成本高昂--以及它们有可能提供关于过去各种时间和空间尺度上的大气化学、大气和海洋环流以及人为污染的非常详细的信息--显然有必要为冰芯分析提供尽可能最佳的分析程序和仪器，特别是对于诸如即将在南极洲西部的内陆基岩冰芯这样的深层岩芯，那里的样品供应非常有限。该项目的科学价值在于，与一台HR-ICPMS相比，两台实时运行的平行HR-ICPMS仪器可以对单个冰芯样品上的一套更全面的元素进行更好、更有针对性的测量。它还可以进行额外的分析(例如，可溶性铁[Fe]和铁的形态)，因为HR-ICPMS只需要比ICPOES多40%的样品体积。NSF对拟议的仪器采购的支持将导致在利用冰化学研究过去的气候、海洋和大气环流、大气化学和人为污染方面取得重大进展。第二台HR-ICP-MS的使用将进一步提高和扩大DRI以及内华达州大学和社区学院系统(UCCSN)教职员工在不同领域(例如，降水中的污染气溶胶、地下水指纹、确定地表水中胶体物质的来源、对环境健康有影响的微量元素/树轮分析、考古学中的微量元素分析)的研究能力。一个相关的更广泛的影响是，这将使该机构能够吸引新的教员(目标是增加多样性)。这也将改善和扩大全州研究生和本科生的机会。

3This MRI award supports the acquisition of an Element2, double-focusing HR-ICPMS and additional equipment to be operated in parallel with the existing ICP instruments. Given the high cost of collecting and storing ice cores -and their potential to provide highly detailed information on past atmospheric chemistry, atmospheric and oceanic circulation, and anthropogenic pollution across a wide range of temporal and spatial scale - it is clear that the best possible analytical procedures and instrumentation for ice core analyses are warranted, particularly for deep cores such as the upcoming Inland bedrock ice core in West Antarctica where sample availability is very limited. The scientific merit of this project is that two parallel HR-ICP-MS instruments operating in real time would allow improved, targeted measurements of a more comprehensive suite of elements on a single ice core sample than is possible with one HR-ICP-MS. It would also allow for additional analyses (e.g., soluble iron [Fe] and Fe speciation) since the HR-ICP-MS requires only 40% as much sample volume as the ICP-OES. NSF support for the proposed instrument acquisition will result in significant advances in the study of past climates, oceanic and atmospheric circulation, atmospheric chemistry, and anthropogenic pollution using glaciochemistry. The availability of a second HR-ICP-MS will further improve and expand research capabilities for DRI and University and Community College System of Nevada (UCCSN) faculty working in various fields (e.g., pollution aerosols in precipitation, groundwater fingerprinting, determination of sources of colloidal material in surface waters, trace element/tree ring analysis with implications for environmental health, trace element analysis in archeology). A related broader impact is that this will allow the institution to attract new faculty (with a goal of increasing diversity). This will also improve and expand opportunities for graduate and undergraduate students throughout the state.