Centrifugal microfluidic methods for rapid on-site analysis of soil

用于土壤快速现场分析的离心微流体方法

• 批准号: 357011-2007
• 负责人: Salin, Eric
• 金额: $ 4.74万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Strategic Projects Supplemental Competition
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=366218
• 关键词: Centrifugal; microfluidic; methods; rapid; site

This research revolves around the use of a device designed to rapidly measure contaminants (often toxins) in soil in the field (on-site). The device uses small amounts of chemicals as well as the soil sample. The device uses CD sized disks which house small amounts of test and extraction liquids. The soil sample is inserted into the disk. The sample is spun rapidly, forcing the test and extraction liquids through the sample . This device uses advanced magnetically powered grinders to agitate the soil and extraction fluid very quickly so that contaminants can be extracted. The disk is spun faster and the extracted material is then flushed down into a lower chamber where it is mixed with test chemicals which turn the contaminants a specific color depending on the contaminant. The color is detected by a system very similar to a video camera. The computer takes the video signal, measures the intensity of the color and converts it quickly into a measurement which can be used in several ways. If a site is simply being tested, then the system allows the operator to rapidly map the levels ofcontaminants. If a remediation is being done, then the progress can be carefully monitored to ensure that the site is cleaned properly, but that no additional unnecessary and expensive digging or processing is done.

这项研究围绕着使用一种设备来快速测量现场土壤中的污染物（通常是毒素）。该装置使用少量的化学物质和土壤样本。该设备使用CD大小的磁盘，其中存放少量的测试和提取液体。土壤样本被插入磁盘。样品被快速旋转，迫使测试和提取液体通过样品。该设备使用先进的磁力研磨机来快速搅拌土壤和萃取液，从而可以提取污染物。圆盘旋转得更快，提取出来的物质随后被冲入一个较低的腔室，在那里它与测试化学品混合，根据污染物的不同将污染物变成特定的颜色。检测颜色的系统非常类似于摄像机。计算机接收视频信号，测量颜色的强度，并将其迅速转换成可用于多种方式的测量值。如果一个地点只是被测试，那么该系统允许操作员快速绘制出污染物的水平。如果正在进行补救，那么可以仔细监测进展，以确保该地点得到适当的清洁，但不进行额外的不必要和昂贵的挖掘或处理。