1. Department of Chemistry Faculty of Science Chulalongkorn University Bangkok 10330 Thailand
2. Chromatographic Separation and Flavor Chemistry Research Unit and Center of Molecular Sensory Science Department of Chemistry Faculty of Science Chulalongkorn University Bangkok 10330 Thailand
3. Electrochemistry and Optical Spectroscopy Center of Excellence (EOSCE) Department of Chemistry Faculty of Science Chulalongkorn University 254 Phayathai Road, Pathumwan Bangkok 10330 Thailand