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热带海洋学报 2009, 28(4) 35-41 DOI:
ISSN: CN: |
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| 海洋调查与观测 |
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基于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电极及其性能标定 |
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韩沉花，潘依雯，叶瑛 |
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浙江大学海洋科学与工程学系，浙江 杭州 310027 |
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摘要：
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。 |
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关键词：
Zn-Al型水滑石
Zn-Al型水滑石
复合膜离子载体
复合膜离子载体
溶解无机碳电极
溶解无机碳电极
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HAN Chen-hua，PAN Yi-wen，YE Ying |
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Department of Ocean Science and Engineering, Zhejiang University, Hangzhou 310027, China |
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Abstract:
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. |
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Keywords:
polydimethylsiloxane gel
polydimethylsiloxane gel
Zinc-Aluminium-hydrotalcite (Zn-Al-LDH)
Zinc-Aluminium-hydrotalcite (Zn-Al-LDH)
ion carrier complex membrane
ion carrier complex membrane
dissolved inorganic carbon microelectrode
dissolved inorganic carbon microelectrode
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收稿日期 2008-11-15 修回日期 2009-03-02 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 叶瑛 |
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