Digital Submersible Chemical Analyzer for Oceanographic Science

海洋科学仪器开发项目将继续开发可广泛用于海洋学研究的潜水化学分析仪（扫描仪）。新仪器将适合于部署在剖面测量仪器或研究潜水器上，以及海底通量室和深拖航行器等平台上，并适合于长期（最多四个月）部署的系泊。 所提出的设计简单而灵活，这将使其能够用于宏量营养素以及微量元素。 新一代的扫描仪需要一个新的泵系统和其他改进。 将使用微型电磁泵，比以前的蠕动泵更小，更轻，并且可以单独控制。 单个微处理器控制每个流动流的灵活性允许每个试剂、样品和标准品的可变流速（包括无流量）。 这将有助于分析优化，并使其能够在同一扫描仪系统上访问几个不同的分析。 第四代扫描仪的目标是比以前的版本更简单，更强大的系统，可用于更广泛的研究。 显然需要能够进行现场化学测量的改进仪器。 许多大型研究项目的科学计划都需要这种能力。

This Ocean Sciences Instrumentation Development project will continue development of a submersible chemical analyzer (Scanner) that can be widely used for oceanographic studies. The new instrument will be suitable for deployment on profiling instruments or research submersibles, as well as on platforms such as benthic flux chambers and deep towed vehicles, and on moorings for longer term (up to four-month) deployments. The proposed design is simple and flexible, which will allow it to be used for both macro-nutrients, as well as trace elements. This new generation of the existing Scanner requires a new pumping system and other refinements. Micro-solenoid pumps will be used that are smaller and lighter than previous peristaltic pumps and they can be individually controlled. The flexibility of individual microprocessor control of each flow stream allows variable flow rates (including no flow) for each reagent, sample and standard. This will facilitate assay optimization and make it possible to access several different analyses on the same Scanner system. The goal of this fourth generation scanner is a substantially simpler and more robust system than previous versions that can be used in a greater variety of studies. There is a clear need for improved instruments capable of performing chemical measurements in situ. The science plans for many large scale research projects call for this capability.