Development and Application of Fiber Optic Sensors for Improved Measurement of pCO2 in Sea Water

这个海洋科学仪器开发项目将 设计和制造光纤传感器，用于连续敏感 测量海水中的pCO 2。 二氧化碳在其中扮演着重要角色。 地球化学循环 研究这些复杂的 过程需要精确的定量测量 二氧化碳的变化，以了解 海洋对全球二氧化碳循环的贡献。 光纤在过去十年中的出现， 对化学传感器技术产生影响。 光学 传感器由附着在传感器远端的试剂组成， 光纤，该光纤改变其光学特性， 暴露于特定分析物。 这些传感器很小 （约200微米），不需要直接电气 样品和传感器之间的连接，并且没有 电磁干扰 这些特点使 光学传感器是海上测量的理想选择。 这个项目 旨在开发基于光学的可部署仪器， 用于连续灵敏pCO 2测量的传感器， 海水 该项目分为三个部分。 1)传感器/指示器 开发将在Tufts进行。 新型指示 具有增强的灵敏度和内部校准的方案 能力将受到考验。 2)基于实验 将利用研究和实地测量进行测量， 便携式仪器，以验证这些指示的使用 海水pCO 2测量方案。 的这一方面 工作将是一个合作项目与塔夫茨和伍兹 霍尔海洋研究所。 3)船上测量 用于现场防护的传感器将由伍兹进行 洞/蒙特雷湾水族馆研究机构人员。

This ocean sciences instrumentation development project will design and build fiber optic sensors for continuous sensitive measurements of pCO2 in sea water. CO2 plays a major role in the biogeochemical cycle. Studying these complicated processes require precise quantitative measurements of small changes in CO2 in order to understand the extent of the ocean's contribution to the global CO2 cycle. The advent of optical fibers within the past decade is producing an impact on chemical sensor technology. Optical sensors consist of reagents attached to the distal tip of an optical fiber that change their optical properties upon exposure to a specific analyte. These sensors are small (approximately 200 microns), require no direct electrical connection between the sample and sensor, and are free from electromagnetic interference. These characteristics make optical sensors ideal for measurements at sea. This project aims to develop deployable instrumentation based on optical sensors for continuous sensitive pCO2 measurements in seawater. The project is divided into three parts. 1) Sensor/indicator development will be conducted at Tufts. Novel indicating schemes with enhanced sensitivity and internal calibration capability will be examined. 2) Laboratory-based measurements will be conducted using both research and field portable instruments to verify the use of these indicating schemes for seawater pCO2 measurements. This aspect of the work will be a collaborative project with Tufts and Woods Hole Oceanographic Institution. 3) Shipboard measurements of sensors for field proofing will be conducted by Woods Hole/Monterey Bay Aquarium Research Institution personnel.