海底长期原位阴离子分析系统的深海试验

Sea trail of an undersea in situ anion analyzing system for long-term monitoring

设计了一种能够在海底进行长期原位阴离子分析的系统,其最大工作水深可达4000m。该系统基于离子色谱的原理,能够对海水中的F^-,Cl^-,Br^-,NO_3^-,SO_4^(2-),PO_4^(3-)等多种离子的浓度进行分析。根据深海环境的特点,采用密封耐压腔体与压力平衡腔体相结合的方法制造了系统原型机。海水原位稀释装置解决了海水部分离子浓度过高的问题;原位校正使系统能够长期在海底工作。海试过程中,系统在约900m深的海底与海底观测网连接,正常工作约6个月,验证了该系统测量的精确性和长期工作的稳定性。

An undersea analyzing system for long-term measurement of seawater anions,concentration down to 4000-meter depth was designed and implimented.It can detect the anions such as F-,Cl-,Br-,NO3-,SO42-,PO43-,etc.by the method of ion chromatography.A prototype was made based on the design of sealed pressure housing and pressure balancing housing and it was tested by sea trail.The calibration device addresses the issue of deviation during longterm working,and the dilution parts can solve the too concentrated problem of the anions to be detected.In sea trail,the system was deployed at seafloor and connected to the ocean observatory at the depth of about 900 meters.The trail lasted for 6 months and results demonstrated the system＇ s stability during long-term working and precision of seawater anions monitoring.