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Journal of Chemistry
Volume 2013 (2013), Article ID 971805, 8 pages
Research Article

Stability of O/W Emulsion with Synthetic Perfumes Oxidized by Singlet Oxygen

1Faculty of Biomedical Engineering, Toin University of Yokohama, 1614 Kurogane-cho, Aoba-ku, Yokohama 225-8503, Japan
2Biomedical Engineering Center, Toin University of Yokohama, 1614 Kurogane-cho, Aoba-ku, Yokohama 225-8503, Japan
3Institute of International Science Education, International Pacific University, TOC Building 16F, 1-1-7 Sakuragi-cho, Naka-ku, Yokohama 231-8331, Japan

Received 21 December 2012; Accepted 29 January 2013

Academic Editor: Stoyan Karakashev

Copyright © 2013 Naoki Watabe et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We prepared O/W emulsion composed of a synthetic perfume, n-dodecane, protoporphyrin IX disodium salt (PpIX-2Na), sodium dodecyl sulfate, and water and investigated oxidative decomposition of the synthetic perfume in the emulsion and change in the stability of the emulsion by singlet oxygen (1O2) generated by photosensitization of PpIX-2Na. We used eugenol, linalool, benzyl acetate, α-ionone, α-hexylcinnamaldehyde, and d-limonene as a synthetic perfume. The stability of the O/W emulation including eugenol and linalool significantly decreased with increasing light irradiation time. The decrease in the emulsion stability may be attributable to oxidative decomposition of eugenol and linalool by 1O2 and enlargement of the oil droplet size.