Flow Injection Analyzer for in Situ Oceanic Chemical Analyses

伍兹霍尔海洋研究所将继续开展一项海洋仪器开发项目，开发、建设和测试一个多通道、原位流动注入化学分析系统。该设备的目的是在长达六个月的时间内，对整个海洋深处的硝酸盐和磷酸盐进行自主的原位显色测量。计划在将来同时测量额外的无机营养素。目前已经建造了一个浅水原型，但由于其依靠脐带电缆提供动力并控制各种泵和马达，因此深度有限。这项新工作将开发电子设备和机制，使分析仪能够在6000米深的水下自主工作。将开发防污措施，并进行试剂稳定性测试，以便长期无人值守部署。该分析仪非常适合于测试一个新的科学假设，即由零星和短暂的营养物质注入驱动的贫营养水域的初级生产力。该分析仪还打算在与GOFS全球地球科学计划相关的时间序列调查中有许多应用。

The Woods Hole Oceanographic Institution will continue an oceanographic instrumentation development project to develop, construct, and test a multi-channel, in situ flow injection chemical analysis system. The objective of the device is to make autonomous in-situ colorometric measurements of nitrate and phosphate to full ocean depths for periods of up to six months. Simultaneous measurement of additional inorganic nutrients is planned for he future. A shallow water prototype has been constructed, but is depth limited because it relies on an umbilical cable to provide power and to control the various pumps and motors. This new effort will develop the electronics and mechanisms to enable the analyzer to function autonomously in depths of down to 6,000 meters. Anti-fouling measures will be developed and reagent stability tests will be made to allow long-term unattended deployments. The analyzer is ideally suited for testing a new scientific hypothesis about primary productivity in oligotrophic waters being driven by sporadic and short-lived injections of nutrients. The analyzer is also intended to have numerous applications in time-series investigations relating to GOFS Global Geoscience initiative.