MRI: Acquisition of a High Resolution-Inductively Coupled Plasma-Mass Spectrometer

高分辨率电感耦合等离子体质谱法（HR-ICP-MS）是目前最快速、最灵敏的微量元素分析方法之一。资助的仪器将促进对墨西哥湾北部新出现的环境问题的重要研究，例如墨西哥湾人为活动（包括深水地平线石油泄漏）污染物的命运、运输、生物利用度和毒性，以及对河流出口和日益严重的海岸侵蚀所产生的污染物、营养物质和有机物的研究。富营养化和缺氧形成的相关过程和机制。首席研究员在水生和海洋系统的痕量金属生物地球化学方面有着长期的贡献记录。在过去的几年里，研究者已经培训了一些使用ICP-MS的研究生和本科生。此外，一些学生的论文也受益于该设施产生的数据。社会需要有能力的HR-ICP-MS用户，因为目前全国确实缺乏。该仪器将提供新的研究基础设施，以取代一种非常旧但仍能工作的仪器，该仪器将用于基础和应用研究问题以及合同工作。高分辨率-电感耦合等离子体质谱（HR-ICP-MS）是一种高灵敏度（万亿分之一）的多元素分析技术，特别适用于环境分析，是大多数学术实验室进行超净微量元素工作的分析仪器。新提供的HR-ICP-MS增加了动态范围和提高了磁扫描速度。灵敏度和分辨率有待提高。首席研究员目前的仪器已用于许多主要由nsf资助的项目，包括GEOTRACES分析工作、深水地平线石油泄漏研究、胶体元素组成作为大小函数的研究、河流微量元素化学和渔业研究（鱼耳石组成）。来自学术界和政府机构的其他研究人员与首席研究员合作，研究酸矿排水，海底地下水排放，以及从金属催化剂到工程纳米颗粒到酶辅助因子的各种其他项目。首席研究员正在进行与GEOTRACES相关的工作，并希望参与涉及元素分析的区域溢油恢复工作。目前的工具也对研究培训产生了重大影响。8名首席研究员的研究生，加上3名本科生研究经验（REU）学生，已经使用了当前的HR-ICP-MS，至少有18名其他研究生（主要来自其他大学）也使用了它。

A High Resolution-Inductively coupled plasma-mass spectrometry (HR-ICP-MS) is one of the most rapid and sensitive methods for trace element analysis currently available. The funded instrumentation will facilitate important research on emerging environmental issues in the northern Gulf of Mexico, such as the fate, transport, bioavailability and toxicity of contaminants from anthropogenic activities (including the Deepwater Horizon oil spill) in the Gulf of Mexico, as well as studies of contaminants, nutrients, and organics derived from riverine exports and increasing coastal erosion, and processes and mechanisms related to the formation of eutrophication and hypoxia. The principal investigator has a long track record of contributions to trace metal biogeochemistry in aquatic and marine systems. The investigator has trained a number of graduate and undergraduate students in the use of ICP-MS over the last few years. In addition, several students' theses have benefitted from data generated in the facility. The community needs competent users of HR-ICP-MS as there is a real national shortage currently. The instrument will provide new research infrastructure to replace a very old but working instrument, which will be used on both fundamental and applied research problems, as well as for contract work.High Resolution-Inductively coupled plasma-mass spectrometry (HR-ICP-MS) is a highly sensitive (sub-parts-per-trillion) multi-element analysis technique particularly suited for environmental analysis and is the analytical instrument of choice for most academic labs doing ultra-clean trace element work. Newly available HR-ICP-MS has increased dynamic range and improved magnetic scan speed. Sensitivity and resolution should be improved. The principal investigator's current instrument has been used for a number of mainly NSF-funded projects including GEOTRACES analytical work, Deepwater Horizon oil spill research, studies of colloid elemental composition as a function of size, trace element chemistry of rivers, and fisheries research (fish otolith composition). Other researchers from academia and government agencies collaborating with the principal investigator have worked on studies of acid mine drainage, submarine groundwater discharge, and various other projects ranging from metal catalysts to engineered nanoparticles to enzyme co-factors. The principal investigator has ongoing work associated with GEOTRACES and expects to participate in regional oil spill recovery work which will involve elemental analysis. The current instrument has also had a significant impact on research training. Eight of the principal investigator's graduate students, plus three Research Experiences for Undergraduates (REU) students, have used the current HR-ICP-MS and there are at least 18 other graduate students (mainly from other universities) who also have used it.