开发用于海洋生物地球化学循环观测的深海原位阴离子分析仪

IF 2.3 3区 地球科学 Q2 OCEANOGRAPHY Deep-Sea Research Part I-Oceanographic Research Papers Pub Date : 2024-05-21 DOI:10.1016/j.dsr.2024.104326
Chao Chen , Feng Lyu , Bangchun Wu , Zhengwei Wu
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引用次数: 0

摘要

提出并开发了一种新型深海原位阴离子分析仪(DIAA),用于长期连续观测海洋生物地球化学和生态。DIAA 基于离子色谱(IC)技术,可分析海水中各种阴离子的浓度,如 F-、Cl-、Br-、NO3-、SO42- 和 PO43-。DIAA 由控制电路模块、电导率信号采集模块和流量分析模块组成。控制电路模块安装在一个密封的耐压容器中,而电导率信号采集模块和流量分析模块则安装在一个密封的压力平衡容器中。海水原位稀释装置可解决海水中 Cl- 和 SO42- 浓度超过 IC 检测限的问题。此外,原位校准装置可使 DIAA 在水下长时间运行而无需恢复。此外,DIAA 还能自动诊断和隔离故障。运行状态可在岸上进行远程监控,并可实时获取科学数据。在海试期间,DIAA 与水深约 900 米的蒙特雷加速研究系统(MARS)海底观测站连接,并成功运行了 6 个月。仪器的测量精度和长期稳定性得到了验证。
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Development of a deep-sea in-situ anion analyzer for marine biogeochemical cycle observation

A novel deep-sea in-situ anion analyzer (DIAA) is proposed and developed for long-term and continuous observation of marine biogeochemistry and ecology. The DIAA is designed to analyze the concentrations of various anions in seawater, such as F, Cl, Br, NO3, SO42−, and PO43−, based on ion chromatography (IC) technology. The DIAA consists of a control circuit module, a conductivity signal acquisition module, and a flow analysis module. The control circuit module is installed in a sealed pressure-resistant vessel, while the conductivity signal acquisition module and the flow analysis module are housed in a sealed pressure-balanced vessel. The two vessels are capable of functioning at a water depth of up to 4000 m. A seawater in-situ dilution device is designed to solve the issue that the concentrations of Cl and SO42− in seawater exceeds the IC detection limit. Moreover, an in-situ calibration device enables the DIAA to operate subsea for a long time without recovery. In addition, the DIAA can diagnose and isolate faults automatically. The operation status can be monitored remotely on the shore, and the scientific data can be acquired in real-time. During the sea trial, the DIAA was connected to Monterey Accelerated Research System (MARS) seafloor observatory at a water depth of approximately 900m and operated for six months successfully. The measurement accuracy and the long-term stability of the instrumentation have been verified.

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来源期刊
CiteScore
4.60
自引率
4.20%
发文量
144
审稿时长
18.3 weeks
期刊介绍: Deep-Sea Research Part I: Oceanographic Research Papers is devoted to the publication of the results of original scientific research, including theoretical work of evident oceanographic applicability; and the solution of instrumental or methodological problems with evidence of successful use. The journal is distinguished by its interdisciplinary nature and its breadth, covering the geological, physical, chemical and biological aspects of the ocean and its boundaries with the sea floor and the atmosphere. In addition to regular "Research Papers" and "Instruments and Methods" papers, briefer communications may be published as "Notes". Supplemental matter, such as extensive data tables or graphs and multimedia content, may be published as electronic appendices.
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