Upgrade of ICP-MS Facilities at the University of Southern Mississippi

0824683 Schiller该提案寻求资金以升级现有的Thermo Element 2 ICP-MS，其具有Apex-Q高灵敏度入口系统、膜去溶剂化系统、SC-Fast自动进样器、Apex-FAST入口系统和用于将甲烷引入雾化器气体混合物的附加质量流量控制器/调节器。这些升级将提高系统灵敏度，减少氧化物同量异位素干扰，提高样品通量，允许盐水样品分析，并提高整体性能。ICP-MS升级将对几个现有项目产生重大影响：1）元素分析将有助于阐明阿拉斯加育空地区河流系统中痕量金属和胶体物质的来源、归宿和迁移，从而深入了解北极变暖导致的流域变化。2)微量元素将与营养数据结合使用，以确定路易斯安那州大陆架系统内的水运动和来源。甲烷引入系统将减少样品制备。3）将评估海洋系统中的微量元素分布，以更好地了解Al，Ga和Mn循环及其对海洋初级生产力的影响。提案中还确定了SM、大学外、政府机构和商业实体的用户，席勒将负责连接新仪器的升级。该设施作为一个收费服务实验室，对大学、政府和商业用户收取不同的分析费用。聘请了一名全职技术人员来操作仪器。研究人员也被允许访问该设施，以帮助样品制备和分析。USM ICP-MS设施为USM社区内外的一系列用户提供服务。更高的灵敏度、更高的样品吞吐量和更稳健、耗时更少的分析将使该设施能够为更多客户提供服务，并获得更高质量的数据。PI有三名博士和一名MS学生，他们使用该仪器进行教育和研究。该实验室赞助了一名REU暑期学生和一名高中志愿者。

0824683Schiller This proposal seeks funding to upgrade an existing Thermo Element 2 ICP-MS with an Apex-Q high-sensitivity inlet system, a membrane desolvation system, an SC-Fast autosampler, an Apex-FAST inlet system and an additional mass flow controller/regulator for methane introduction in the nebulizer gas mixture. These upgrades will increase system sensitivity, reduce oxide isobaric interferences, improve sample throughput, allow saline sample analysis, and improve overall performance. The ICP-MS upgrades will have a significant impact on several existing projects: 1) elemental analysis will help elucidate the sources, fate and transport of trace metals and colloidal material in the Yukon River system in Alaska, offering insights into watershed changes resulting from Arctic warming. 2) Trace elements will be used in conjunction with nutrient data to determine water movements and sources within the Louisiana Shelf system. The methane introduction system will reduce sample prep. And, 3) Trace element distributions will be assessed in oceanic systems to better understand Al, Ga and Mn cycling and their impact on oceanic primary productivity. Users at SM, outside universities, government agencies and commercial entities are also identified in the proposal Shiller will be responsible for interfacing the new instrument upgrades. The facility works as a fee-for-service laboratory, charging different analysis rates for university, government and commercial users. A full-time technician is employed to operate the instrument. Researchers are also allowed to visit the facility to aid in sample preparation and analysis. The USM ICP-MS facility serves an array of users both inside and outside the USM community. Greater sensitivity, sample throughput and more robust, less time-consuming analyses will allow the facility to serve more customers and obtain higher quality data. The PI has three PhD and one MS student who use the instrument for their education and research. The lab has sponsored an REU summer student and a high school volunteer.***