深海探测溶解无机碳含量异常，可以为寻找热液口提供一个很好的证据。本文设计的基于自制的聚二甲基硅氧烷胶与Zn-Al型水滑石复合膜为离子载体的溶解无机碳探测电极属于电势型电极，适用于对深海中溶解无机碳的测量，具有体积微小、便于与pH、盐度、温度、氧化还原电位等多种传感器集成在同一探头腔内，实施在线探测等优点。实验室条件下，将该溶解无机碳探测电极与银/氯化银参比电极分别接在Keithley 6517A高阻抗电位计输入端进行测试，测试结果表明：该电极对不同浓度的碳酸氢钠溶液具有良好的响应信号，响应时间大约在30s—1 min，检测限在10－1—10－4mol?L–1。

A good method to find hydrothermal vents is to detect the abnormal concentration of dissolved inorganic carbon in deep ocean. The authors have designed a dissolved inorganic carbon microelectrode based on polydimethylsiloxane（PDMS）gel and Zinc-Aluminium-hydrotalcite (Zn-Al-LDH) ion carrier complex membrane, which can be used to detect deep-ocean inorganic carbon abnormality. This dissolved inorganic carbon microelectrode is miniature, and can conveniently be integrated in the same probing cavity with pH microelectrode, salinity meter, temperature sensor, oxidation-reduction potential sensor, etc. to detect various in-situ signals. It has been tested in the laboratory condition, together with Ag/AgCl reference microelectrode, connecting with the input of Keithley 6517A high-resistant potentiometer. It was shown that the signals responded well to different concentrations of NaHCO3 solutions, with 30-60 second c.a. response time and a limiting range between 10－1 and 10－4 mol?L–1.