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

点击翻译按钮获取中文摘要

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.