Microwave digestion system

微波消解系统

• 批准号: 345879-2007
• 负责人: Pedersen, Thomas
• 金额: $ 1.28万
• 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: 2006
• 资助国家: 加拿大
• 起止时间: 2006-01-01 至 2007-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=325768
• 关键词: Microwave; digestion; system

Funding is requested to purchase a state-of-the-art microwave digestion system that will be used to dissolve sediment, rock, and biological samples quantitatively in a hot acid cocktail under high pressure. This technique is the method of choice in modern geochemistry and yields solutions that are suitable for chemical analysis via a range of techniques. In our case, we will analyze the concentrations of a broad range of trace elements using a recently installed, in-house Inductively-Coupled Plasma Mass Spectrometer. The microwave unit will be heavily used to support the research of at least four faculty members and their research teams, comprising post-doctoral fellows, graduate students, and senior (Honours) undergraduates. The spectrum of projects that will rely on the instrumentation include: a) studies of past climate history and ocean circulation that are based on detailed multi-element analyses of sea-floor sedimentary deposits; b) investigations of the chemistry and physics of the Earth's interior using rock samples collected in the field; c) studies of processes that control the transfer of heat and mass from the Earth's mantle into the crust and ocean at mid-ocean ridges, using rocks and drill core samples collected both on the seafloor and from former ocean-crust sequences now exposed on land; and d) investigations of the human impact on natural cycles of elements in rivers and lakes, including studies of mercury distributions and the processes that control them. The new unit will replace an aging, episodically malfunctioning instrument that poses significant safety issues, a major concern given the dangerous, highly corrosive acids (e.g. hydrofluoric acid) that we use in our digestions.

需要资金购买最先进的微波消解系统，该系统将用于在高压下将沉积物、岩石和生物样品定量溶解在热酸混合物中。该技术是现代地球化学中选择的方法，并通过一系列技术产生适合化学分析的解决方案。在我们的案例中，我们将使用最近安装的内部电感耦合等离子体质谱仪来分析各种微量元素的浓度。微波单元将大量用于支持至少四名教职人员及其研究团队的研究，其中包括博士后研究员、研究生和高年级（荣誉）本科生。依赖仪器的项目包括： a) 基于对海底沉积物的详细多元素分析，对过去的气候历史和海洋环流进行研究； b) 使用现场采集的岩石样本研究地球内部的化学和物理； c) 使用在海底和现在暴露在陆地上的前洋壳序列中收集的岩石和钻芯样本，研究控制热量和质量从地幔传递到大洋中脊的地壳和海洋的过程; d) 调查人类对河流和湖泊中元素自然循环的影响，包括研究汞的分布及其控制过程。新装置将取代老化、偶尔出现故障的仪器，该仪器会带来严重的安全问题，考虑到我们在消化中使用危险的、高腐蚀性的酸（例如氢氟酸），这是一个主要问题。