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

描述(申请人提供)：高毒性和广泛发生的情况相结合，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，安捷伦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量化地下水中的砷。在现场操作过程中，SERS传感器模块可以直接插入到地下水样品中，通过使用长纤维长度直接抬到地面或下降到水井中，用于现场砷的检测和定量。建议的系统将能够在1 ppb浓度水平的现场、现场检测地下水中的砷，几乎不需要或不需要样品制备，并且没有干扰。在第一阶段，我们已经成功地演示了使用建议的便携式表面增强拉曼散射系统检测水样中1 ppb水平的砷。在第二阶段，通过使用合适的激发波长和具有优化的局域表面等离子体共振特性的SERS衬底，所提出的SERS系统的性能将被优化以在感兴趣的波长处获得最大吞吐量。将对当地水井地下水中的砷进行现场测量。这些实地研究的反馈将被用来进一步开发/改进个别部件的性能，以便开发出适合现场实际操作的优化监测系统，并准备好投入生产。

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.