Host: Abstracts of Annual Meeting of the Geochemical Society of Japan
Pages 221-
Volcanic gases consist of carbon dioxide, sulfur dioxide, hydrogen sulfide, and so on. Since their chemical composition and release amount provide important information on volcanic activity, various observation techniques are studied. In recent years, methods using a semiconductor or a chemical sensor have drawn attention because a compact and simple observation system can be constructed. However, these sensors have problems with long-term stability, response and selectivity. In this study, we focused on the localized surface plasmon resonance (LSPR) sensor. It conventionally has a good response and stability, but low sensitivity to volcanic gases. We developed the LSPR sensors whose detection limits were 5 ppm and 0.6 ppm for hydrogen sulfide and sulfur dioxide, respectively, by coating adsorbents with high gas adsorption capacity and selectivity for these gases.
