Collaborative Research: Intercalibrating Analytical Methods for Osmium Isotopes and Concentrations in Seawater

合作研究：海水中锇同位素和浓度的相互校准分析方法

• 批准号: 0751649
• 负责人: Mukul Sharma
• 金额: $ 4.56万
• 依托单位: Dartmouth College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-07-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0751649&HistoricalAwards=false
• 关键词: Collaborative; Research; Intercalibrating; Analytical; Methods

Osmium is one of the rarest elements present in the oceans existing in multiple oxidation states. To date, different analytical protocols have been used to analyze seawater samples from the three ocean basins for osmium resulting in different results for each. Scientists from Woods Hole Oceanographic Institute, Dartmouth University, and the University of Hawaii propose to analyze samples collected during the two GEOTRACES intercalibration cruises to determine whether divergent results obtained for the three ocean basins is the result of inherent differences in the system or due to the different analytical protocols. The PIs would intercalibrate an osmium standard and tracer solutions, prepare "osmium free' water and assess blanks, and evaluate the effect of sampling and storage on the osmium isotopic content. As regards broader impacts, accurate and precise osmium concentrations and isotopic ratios would provide the sciences community with a potential new tracer in marine chemistry and paleoceanography.

osmium是在多种氧化状态中存在的海洋中最稀有的元素之一。 迄今为止，已经使用不同的分析方案来分析三个海水盆地的海水样品，以供osmium，从而为每种osmim产生不同的结果。 伍兹霍尔海洋研究所，达特茅斯大学和夏威夷大学的科学家提议分析在两个地理位置互动巡航过程中收集的样品，以确定三个海洋盆地获得的不同结果是该系统固有差异的结果还是由于不同的分析方案。 The PIs would intercalibrate an osmium standard and tracer solutions, prepare "osmium free' water and assess blanks, and evaluate the effect of sampling and storage on the osmium isotopic content. As regards broader impacts, accurate and precise osmium concentrations and isotopic ratios would provide the sciences community with a potential new tracer in marine chemistry and paleoceanography.