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

该MRI合同支持采购Element2双聚焦HR-ICPMS和与现有ICP仪器并行操作的其他设备。鉴于收集和储存冰芯的费用很高，而且它们有可能提供关于过去的大气化学、大气和海洋环流以及大范围时空尺度上的人为污染的非常详细的信息，因此显然有必要采用最好的分析程序和仪器进行冰芯分析。特别是对于深层岩芯，如即将在南极洲西部进行的内陆基岩冰芯，那里的样品可用性非常有限。该项目的科学价值在于，两台并行的HR-ICP-MS仪器实时运行，可以对单个冰芯样品进行更全面的有针对性的测量，而不是使用一台HR-ICP-MS。它还允许进行额外的分析（例如，可溶性铁[Fe]和铁形态），因为HR-ICP-MS只需要ICP-OES 40%的样本量。美国国家科学基金会对拟议的仪器获取的支持将在利用冰川化学研究过去气候、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的可用性将进一步提高和扩大DRI和内华达州大学和社区学院系统（UCCSN）在各个领域（例如，降水中的污染气溶胶、地下水指纹、地表水中胶状物质来源的测定、影响环境健康的微量元素/树木年轮分析、考古学中的微量元素分析）工作的教师的研究能力。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师（以增加多样性为目标）。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.