一种深海质谱用超高压膜进样装置的设计与测试  

Design and Testing of an Ultra-High Pressure Membrane Sampling Device for Deep-Sea Mass Spectrometry

作　　者：高佳奇 江游[1] 戴新华[1] 方向[1] 黄泽建[1] GAO Jia-qi;JIANG You;DAI Xin-hua;FANG Xiang;HUANG Ze-jian(National Institute of Metrology,Beijing 100029,China)

机构地区：[1]中国计量科学研究院,北京100029

出　　处：《质谱学报》2023年第3期333-340,I0001,共9页Journal of Chinese Mass Spectrometry Society

基　　金：中国科学院海洋大科学研究中心重点部署项目(COMS2020J10);国家重点研发计划(2016YFF0102603、2017YFF0206204)。

摘　　要：为实现质谱技术在深海探测中的应用,本工作研制了一种能够耐受超高水压的膜进样装置,以解决在线质谱仪无法在高压海水环境中直接检测溶解气体的技术难题。该装置利用疏水膜的选择渗透性实现气体的直接进样,通过焊接工艺将多孔烧结棒、真空堵头和进样不锈钢管加工制成一体化进样结构,然后外套疏水膜,利用超高真空密封胶将膜与进样结构实现固定和密封,在40 MPa水压下工作超过了半个月。另外,将该进样装置应用于在线质谱系统,并针对不同压强、温度、流速下苯系物等的进样效率进行测试。The development of deep-sea exploration technology is of great significance to the study of global environmental changes,the exploration of life origin,the search for seabed resources,and the assessment of marine pollution,and has become an important direction of today's scientific and technological development.Traditional analytical techniques require seawater to be sampled,stored,and then transferred to a laboratory for analyzing,which not only consume time,but also result in biased results.The in situ detection technology can realize long-term,real-time continuous detection,which can solve the problem of sample storage and improve the detection accuracy.Mass spectrometry has abilities to qualitatively and quantitatively analyze low-concentration substances,which is suitable for in situ analysis.But compared with ground-based applications,the enormous pressure of the deep ocean brings challenges to the analysis of mass spectrometry in the ocean.Mass spectrometry instruments need to work in a high vacuum environment,which require that the sampling system must be able to withstand the pressure difference between the high-pressure liquid and the high vacuum inside the instrument.In order to realize the application of mass spectrometry detection technology in deep-sea exploration,a membrane sampling device capable of withstanding ultra-high water pressure was developed based on the injection technology of volatile organic compounds and dissolved gases in high-pressure liquid environment.The device processes porous sintered rods,vacuum plugs and sampling stainless steel tubes into an integrated sampling structure through a welding process,then coated a hydrophobic membrane,and used ultra-high vacuum sealant to fix and seal the membrane and sampling structure.Therefore,it is ensured that it has sufficient mechanical structural strength,so that the sample injection device can work directly under ultra-high pressure for a long time.A high pressure test environment was constructed by using a high performance liquid chro

关 键 词：膜进样质谱 原位分析 水下质谱 高压 深海探测 

分 类 号：O657.63[理学—分析化学]