Collaborative Research: Changing the manganese paradigm

合作研究：改变锰范式

基本信息

批准号：
1031272
负责人：
George Luther
金额：
$ 8.23万
依托单位：
University of Delaware
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2010
资助国家：
美国
起止时间：
2010-09-01 至 2012-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1031272&HistoricalAwards=false
关键词：
Collaborative Research Changing manganese paradigm

项目摘要

The project, a collaboration between investigators at the University of Delaware and Oregon Health and Science University, will develop a sensitive method for measuring the concentration of total Mn and Mn(III) at sub-nanomolar levels in ocean waters, both in oxic environments and in reduced zones. The proposed method is a modification of a published method, which has nM sensitivity. The improvement in the detection limit of this method and the demonstration of its ability to measure Mn(III) at environmental levels (0.5 nM)is the major goal of this one year project. Two different approaches will be investigated, and preliminary evidence suggests that both approaches are viable alternatives. Use of a long path optical cell will increase sensitivity of the current detection system, and preconcentration is another approach that can be used. An alternative is the use of fluorescence detection, and this will also be investigated. The various methods will be tested using referrence materials, including those collected during recent oceanographic intercalibration exercises. Additionally, the methods will be tested during short cruises and through laboratory culture experiments.Broader Impacts: Manganese redox chemistry impacts a number of global biogeochmeical cycles, and therefore understanding these interactions has broad implications. The project will train graduate students, and the results will be desseminated through a number of educational and public outreach activities. This research will continue international collaborations developed during previously funded work.

该项目由特拉华大学和俄勒冈健康与科学大学的研究人员合作，将开发一种灵敏的方法，用于测量海水中亚纳摩尔水平的总锰和锰（III）浓度，无论是在含氧环境还是在含氧环境中。在减少的区域。所提出的方法是对已发布方法的修改，具有 nM 灵敏度。提高该方法的检测限并证明其在环境水平（0.5 nM）下测量 Mn(III) 的能力是这个为期一年的项目的主要目标。将研究两种不同的方法，初步证据表明这两种方法都是可行的替代方案。使用长光程光学池将提高当前检测系统的灵敏度，预浓缩是另一种可以使用的方法。另一种方法是使用荧光检测，这也将被研究。将使用参考材料对各种方法进行测试，包括在最近的海洋学相互校准演习中收集的材料。此外，这些方法将在短途航行和实验室培养实验中进行测试。更广泛的影响：锰氧化还原化学影响许多全球生物地球化学循环，因此了解这些相互作用具有广泛的意义。该项目将培训研究生，其成果将通过一系列教育和公共宣传活动进行传播。这项研究将继续之前资助的工作中开展的国际合作。