Analytical Sciences

Determination of Sulfide with Acidic Permanganate Chemiluminescence for Development of Deep-sea in-situ Analyzers

Keiichi FUJIMORI,* Kenta TSUJIMOTO,* Takayo MORIUCHI-KAWAKAMI,* Yasuhiko SHIBUTANI,* Masato UEDA,** Takahiko SUZUE,** Hideshi KIMOTO,** and Kei OKAMURA***

*Department of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi, Osaka 535-8585, Japan
**Kimoto Electric Co. Ltd., 3-1 Funahashi, Ten-noji, Osaka 543-0024, Japan
***Center for Advanced Marine Core Research, Kochi University, B200 Monobe, Nankoku, Kochi 783-8502, Japan

A new chemiluminescence method is proposed for the determination of sulfide in seawater based on the chemiluminescence reaction between sulfide and an acidic permanganate solution. 3-Cyclohexylaminopropanesulfonic acid was used as a chemiluminescence enhancer. By use of this method, 1 – 150 μM of sulfide could be determined in artificial seawater. The limit of detection was 0.17 μM sulfide. We investigated the effects of salinity, water temperature, and interfering chemicals such as heavy-metal ions and organic matter. In addition, natural seawater spiked with sulfide was analyzed. The results showed that the CL method could be applied to a deep-sea sulfide analyzer.

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