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Ion-exclusion/adsorption chromatography of dimethylsulfoxide and its derivatives for the evaluation to quality-test of TiO(2)-photocatalyst in water |
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| Authors: | Mori Masanobu Tanaka Kazuhiko Taoda Hiroshi Ikedo Mikaru Itabashi Hideyuki |
| Institution: | a Department of Chemistry, Faculty of Engineering, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan b Graduate School for International Development and Cooperation, Hiroshima University, 1-5-1 Kagamiyama, Higashi-Hiroshima 739-8529, Japan c National Institute of Advanced Industrial Science and Technology, 110 Nishiibara-cho, Seto 489-0884, Japan d Engineering of Graduate School, Chubu University, 1200 Matsumoto-cho, Kasugai, Japan |
| Abstract: | Ion-exclusion/adsorption chromatography of dimethylsulfoxide (DMSO) and its derivatives, i.e., methanesulfinic acid (MSI), methanesulfonic acid (MSA) and sulfuric acid (SA), was developed in order to clear the decomposition mechanism of DMSO on quality-test of TiO2-photocatalyst in water. The separation was achieved by the adsorption effect for DMSO and ion-exclusion effect for MSI, MSA and SA under optimum conditions, using a weakly acidic cation-exchange resin column with 20 mM succinic acid as the eluent. In this system, DMSO and MSI with UV at 195 nm and MSA and SA with conductivity detection were consecutively determined by single injection and single separation column. This method was used to monitor the artificial decomposition of DMSO induced by a photocatalyst. The concentration of DMSO by active oxygens (e.g., OH radical) generated from surface of photocatalyst was found to be decreased through the stoichiometric reaction in the order of MSI, MSA and SA. |
| Keywords: | Ion-exclusion Adsorption Chromatography Photocatalyst Dimethylsulfoxide Active oxygen |
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