深海溶解态铁、 锰和硫化物的快速测量原位分析仪研制  

Development of An In-Situ Analyzer for Rapid Measurement of Dissolved Iron,Manganese and Sulfide in Deep Sea

作　　者：王洪亮 赵月霞 杨磊 吴俊飞[2] 李劲松[3] WANG Hong-Liang;ZHAO Yue-Xia;YANG Lei;WU Jun-Fei;LI Jin-Song(National Deep Sea Center,Qingdao 266237,China;School of Electrical and Mechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,China;School of Physics and Materials Science,Anhui University,Hefei 230601,China)

机构地区：[1]国家深海基地管理中心,青岛266237 [2]青岛科技大学机电工程学院,青岛266061 [3]安徽大学物理与材料科学学院,合肥230601

出　　处：《分析化学》2021年第12期1977-1985,共9页Chinese Journal of Analytical Chemistry

基　　金：国家重点基础研究发展计划项目(Nos.2016YFC0302201,2016YFC0302204);国家自然科学基金项目(No.41306103)资助。

摘　　要：研制了深海原位化学分析仪,实现了实时、高密度地获取深海原位观测数据。基于连续流动分析和分光光度法,优化了原位反应条件,设计多通道蠕动泵配合电磁阀的流路系统,开发了光电检测和控制系统,并加工耐压舱和压力自平衡舱,研制出一套深海原位分析仪。本分析仪可同时测量深海溶解态FeⅡ、 FeⅢ、 MnⅡ和硫化物4种组分,最大工作深度为7000 m,测量频率为1 Hz,具有原位校正功能。结果表明,溶解态FeⅡ、 FeⅢ、 MnⅡ和硫化物的测量范围分别为0.1~60μmol/L、 0.2~100μmol/L、 0.1~40μmol/L和0.1~40μmol/L,检出限分别为0.013、 0.024、 0.014和0.012μmol/L。经浅海实验、耐压测试和水池实验后,分析仪搭载于蛟龙号载人潜水器在南海进行了原位实验,最大下潜深度3196 m,并获取了原位光谱数据。研究结果表明,此分析仪可搭载载人潜水器用于深海原位测量。Deep-sea in-situ chemical analyzer can obtain data with high frequency, which is very useful for scientific research and necessary for deep-sea transportation equipment. In this work, an in-situ analyzer was developed for automated determination of dissolved FeⅡ, FeⅢ, MnⅡ and sulfide simultaneously in deep sea based on continuous flow analysis and spectrophotometric detection. The integrated system consisted of a pressure-resistant housing an oil-filled pressure-compensated vessel, and a self-developed hardware to control two multi-channel peristaltic pumps, four solenoid valves and a photoelectric acquisition module. Experimental conditions related to the analysis, including flow path module, spectrometric regent compositions and pH of buffer solution were evaluated and optimized. This deep-sea in-situ chemical analyzer was designed to work at the depth of 7000 m with a measuring frequency of 1 Hz, and showed a limit of detection as low as 0.013, 0.024, 0.014, and 0.012 μmol/L for dissolved FeⅡ, FeⅢ, MnⅡ and sulfide, respectively. The calibration curves prepared in standard solutions were consistent over the linear range of 0.1-60, 0.2-100, 0.1-40 and 0.1-40 μmol/L for dissolved FeⅡ, FeⅢ, MnⅡ and sulfide, respectively. After the test of shallow sea, hydrostatic pressure and tank test, this analyzer was implemented on tool shed of Jiaolong deep manned submersible, and performed sea trial. Spectra and signal intensity changes of the maximum absorption wavelength were obtained in-situ at the depth of 3196 m. This compact automatic analyzer was suitable for deep sea in-situ determination of the chemical environment of hydrothermal vent habitats.

关 键 词：原位 深海分析仪 连续流动分析 铁 锰 硫化物 

分 类 号：P716.5[天文地球—海洋科学]