Ion Chromatography for Environmental Analysis

这笔赠款将用于购买一台离子色谱仪，用于环境分析，包括阴离子和阳离子的空气和水分析。离子色谱是一种根据离子与离子交换剂的亲和力来分离离子和极性分子的分析技术。进样水样，液体流动相携带样品通过分析柱。离子被色谱柱(固定相)中的物质吸引，因为它带有相反的电荷。离子以不同的强度与固定相相互作用，这导致它们在柱内的停留时间不同，从而产生离子分离。每个离子在不同的时间离开色谱柱，并在它们通过检测器时测量数量。离子是通过它们的停留时间来识别的。离子色谱的优点包括能够在一次样品运行中检测多个阴离子或阳离子，以及较高的基质容差。来自密西索加多伦多大学地理系和生物系的五名NSERC资助的研究人员就这项提议进行了合作。教职员工无法在他们的大学使用离子色谱仪，对这种设备的迫切和必要的需求得到了系里额外的财政支持。地理部和副校长研究室。阴离子和阳离子分析将用于支持NSERC资助的以下研究：通过扩散采样，城市空气污染的时空变化；与海冰有关的离子，以重建过去的北极气候；城市水中营养物质和污染物的通量、过境时间和周转；培训和验证用于水质监测的遥感方法；以及将微生物群落动态与环境条件联系起来。我们预计，在离子色谱仪的15年寿命内，该设备将支持至少400名HQP的培训。

This grant will support the purchase of one Ion Chromatograph that will be used for environmental analysis including air and water analysis of anions and cations. Ion chromatography is an analytical technique to separate ions and polar molecules based on their affinity to an ion exchanger. An aqueous sample is injected, and a liquid mobile phase carries the sample through an analytical column. Ions are attracted to the material in the column (stationary phase) because of its opposite charge. Ions interact at different strengths with the stationary phase, which causes them to have different residence times within the column, creating separation of ions. Each ion exits the column at a different time and the quantities are measured as they pass through a detector. Ions are identified by their residence times. Advantages of ion chromatography include the ability to detect multiple anions or cations in a single sample run and high matrix tolerance. Five NSERC funded researchers have collaborated on this proposal from the Departments of Geography and Biology at the University of Toronto Mississauga. The faculty members do not have access to an Ion Chromatograph at their university and the urgent and essential need of this equipment has received additional financial support from the Dept. of Geography and the Office of the Vice-Principal Research. Anion and cation analysis will be used to support NSERC funded research on spatial and temporal variation of urban air pollution with diffusion sampling; sea ice-related ions to reconstruct past Arctic climates; flux, transit time and turnover of nutrients and contaminants in urban water; training and validation of remote sensing approaches for water quality monitoring; and linking microbial community dynamics to environmental conditions. We expect that during the 15-year lifespan of the ion chromatograph, this equipment will support the training of at least 400 HQP.