Analytical equipment for detecting the concentration and chemical speciation of trace metals and reactive oxygen species in natural waters

用于检测天然水中痕量金属和活性氧的浓度和化学形态的分析设备

• 批准号: 389891-2010
• 负责人: Cullen, Jay
• 金额: $ 2.25万
• 依托单位: University of Victoria
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=443053
• 关键词: Analytical; equipment; detecting; concentration; chemical

The oceanographic community is undertaking a major international program (GEOTRACES http://www.geotraces.org/) to study the marine biogeochemical cycling of trace elements and isotopes and to elucidate the oceanographic information embedded in their distribution. The program consists of sampling detailed water column sections in all major ocean basins, complemented by process and time-series studies in strategically located regions and will carry with it a heavy analytical burden. The scale of this program is unprecedented in the field of chemical oceanography and promises to provide a quantum leap forward in the understanding of ocean processes past and present and their role in Earth's changing climate system. For instance, some trace elements, such as Co, Cu, Fe, and Zn, are essential micronutrients. A better understanding of the factors controlling the distribution and speciation of these potentially biolimiting micronutrients will provide critical information for understanding their role in regulating the structure and productivity of marine ecosystems, the efficiency of these ecosystems at sequestering carbon dioxide and their sensitivity to climate change. This proposal requests funds to acquire components to assemble a flow injection analysis (FIA)/sequence injection analysis (SIA) system designed for the chemiluminescent, colorimetric and fluorometric detection of bioactive trace metals and reactive oxygen species in seawater. These analytical approaches have proven to be cost effective, high throughput, precise techniques for near real-time determinations of dissolved trace metals in seawater that can meet the requirements of analytically intense programs like GEOTRACES.

海洋学界正在开展一项重大国际方案（GEOTRACES http：//www.geotraces.org/），研究微量元素和同位素的海洋地球化学循环，并阐明其分布所包含的海洋学信息。该方案包括在所有主要的海洋盆地进行详细的水柱剖面取样，辅之以在战略位置区域进行过程和时间序列研究，并将承担沉重的分析负担。该计划的规模在化学海洋学领域是前所未有的，并有望在理解过去和现在的海洋过程及其在地球气候变化系统中的作用方面提供一个飞跃。例如，一些微量元素，如Co，Cu，Fe和Zn，是必需的微量营养素。更好地了解控制这些潜在的生物限制性微量营养素的分布和形态形成的因素，将为了解它们在调节海洋生态系统的结构和生产力方面的作用、这些生态系统固存二氧化碳的效率及其对气候变化的敏感性提供关键信息。该提案要求提供资金，以购置组装流动注射分析/顺序注射分析系统的部件，该系统旨在对海水中的生物活性微量金属和活性氧进行荧光、比色和荧光检测。这些分析方法已被证明是具有成本效益的，高通量的，精确的技术，用于近实时测定海水中溶解的痕量金属，可以满足分析密集型项目的要求，如GEOTRACES。