Development of deep sea sensor for resources exploration and measurement of sulfur compounds using the chemiluminescence method

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Hydrogen sulfide can not exit with oxygen because of the strong reducing ability. Hydrogen sulfide can be found around the places as hydrothermal vent and poor oxygen hydrosphere, because these areas have the emitter of hydrogen sulfide. A mineral deposit around hydrothermal vent in deep sea is expected as new supplier of rare-earths, because Japanese industry depends on import of resources. Few analytical apparatus can be applied for measurement of deep sea water. We developed the analytical method of reducing sulfur compounds for research of the hydrothermal vent using the sensitized chemiluminescence of rare-earth complex.