A Portable High Resolution Detector for Rapid Field Arsenic Test in Drinking Wate

描述（由申请人提供）：高毒性和广泛发生的组合产生了对地下水中砷的有效监测的迫切需要。通过这一计划，Atriotron将开发一种基于表面增强拉曼光谱（Sers）的现场可部署监测工具，用于快速现场检测和定量地下水中的砷。在现场操作期间，Sers传感器模块可以直接插入到带到地面的地下水样品中，或者直接降低到水井中，使用长纤维长度进行现场砷检测和定量。拟议的系统将能够检测地下水中的砷在1 ppb的浓度水平，在现场，现场，很少或没有样品制备，没有干扰。在第一阶段，我们已经成功地证明了1 ppb水平的砷在水样中使用拟议的便携Sers系统的检测。在第二阶段中，所提出的Sers系统的性能将通过使用合适的激发波长和具有优化的局部表面等离子体共振特性的Sers基底来优化，以在感兴趣的波长处获得最高的吞吐量。将对当地威尔斯水井的地下水砷含量进行现场测量。这些现场研究的反馈将用于进一步开发/改进单个组件的性能，以便开发适合实际现场操作的优化监测系统并准备生产。

DESCRIPTION (provided by applicant): The combination of high toxicity and widespread occurrence has created a pressing need for effective monitoring of arsenic in groundwater. Through this program Agiltron will develop a field deployable monitoring tool based on surface enhanced Raman spectroscopy (SERS) for rapid on-site detection and quantification of arsenic in groundwater. During operation in the field, the SERS sensor module can be inserted directly into samples of groundwater brought up to the surface or lowered directly into the water well with the use of long fiber length for on-site arsenic detection and quantification. The proposed system will be able to detect arsenic in groundwater at 1 ppb concentration level, in situ, on-site, with little or no sample preparation, and with no interferences. During Phase I we have successfully demonstrated the detection of 1 ppb level arsenic in water samples using the proposed portable SERS system. In Phase II the performance of the proposed SERS system will be optimized for highest throughput at the wavelength of interest by using suitable excitation wavelength and SERS substrates with optimized localized surface plasmon resonance properties. On-site measurement of arsenic in groundwater in local water wells will be conducted. The feedback from these field studies will be used to further develop/improve the performance of individual components so that an optimized monitoring system suitable for practical site operation can be developed and are ready for manufacture.