Development of a Remote Analyzer of the CO2 System in Seawater Based on In Situ Measurement for pH and TCO2

基于 pH 和 TCO2 原位测量的海水中 CO2 系统远程分析仪的开发

• 批准号: 9633022
• 负责人: Frederick Sayles
• 金额: $ 53.58万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-01 至 2005-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9633022&HistoricalAwards=false
• 关键词: Development; Remote; Analyzer; CO2; System

The Woods Hole Oceanographic Institution will undertake an ocean sciences instrumentation development project to develop, build and test an instrument to make autonomous in situ measurements of pH and Total carbon dioxide (TCO2)for extended periods from oceanographic moorings and remote platforms. The instrument will be designed to make measurements at frequencies less than (2/hr. Estimated unattended endurance will be about six months. Both components are based on existing laboratory methods. The pH measurements use well-developed spectrophotometric laboratory methods, while the TCO2 component utilizes exchange of CO2 across a semi-permeable membrane and detection of resulting conductivity changes in a dilute base. The objective is to achieve precision of ( (.002 pH units and (5 (mol/kg. To evaluate instrument performance, tests include short term wire deployments in the deep ocean, deployment on a benthic lander in the deep sea for 3 or 4 months, and near- surface deployment for approximately three months.

伍兹霍尔海洋学研究所将开展一个海洋科学仪器开发项目，以开发、建造和测试一种仪器，从海洋学系泊设备和远程平台长期对pH值和二氧化碳总量进行自动现场测量。 该仪器将被设计为在小于（2/小时）的频率下进行测量。估计无人值守的耐久性将约为6个月。 这两个组成部分都是基于现有的实验室方法。 pH值测量使用成熟的分光光度实验室方法，而TCO 2组件利用CO2穿过半透膜的交换，并检测稀碱中产生的电导率变化。 目标是实现（0.002 pH单位和（5（mol/kg））的精密度。 为了评估仪器性能，测试包括在深海中的短期电线部署，在深海中的海底着陆器上部署3或4个月，以及近表面部署约3个月。