Fiber Optic Chemical Sensor for Trihalomethanes

这个小企业创新研究（SBIR）第一阶段项目是在分析和表面化学的一般领域以及传感器技术的子领域。这项活动的重点是发展光纤化学传感器（FOCS），作为现场检测和监测特定类别化合物的新仪器。特别是，将开发和评价饮用水和地下水中挥发性宝石多卤烃（GPCHC）如三卤甲烷（THM）的新方法。坎德拉激光公司和俄勒冈州立大学将合作，在一个固定在光纤激发/收集系统远端的微型反应堆中实现特定的化学反应。利用二极管泵浦激光器激发反应产物中的荧光；荧光增加的速率将与样品中挥发性物质的浓度有关。在第一阶段开发的仪器可能会在美国的3000多个设施中使用，每个设施为1万多人提供饮用水。此外，可以使用这种方法对地下水和特定废物场址进行常规测试，以进行实时现场监测。

This Small Business Innovation Research (SBIR) Phase I project is in the general area of analytical and surface chemistry and in the subfield of sensor technology. This activity focusses on the development of Fiber Optic Chemical Sensors (FOCS) as new instrumentation for the in-situ detection and monitoring of specific classes of chemical compounds. In particular, a new method for the determination of volatile gem-polyhalogenated hydrocarbons (GPCHC) such as the trihalogenated methanes (THM), in drinking and ground water, will be developed and evaluated. Candela Laser Corporation and Oregon State University will work collaboratively to implement specific chemical reactions in a miniature reactor secured to the distal end of a fiber optic excitation/collection system. A diode pumped laser will be employed to excite fluorescence in a reaction product; the rate of fluorescence increase will be related to the concentration of the volatile species in the sample. The instrumentation developed in this Phase I activity can be potentially employed in the over 3,000 facilities in the U.S. that supply finished drinking water to over 10,000 people per facility. In addition, ground water as well as specific waste sites could be routinely tested using this approach to real time in-situ monitoring.