Analytical Sciences

Abstract − Analytical Sciences, 17(1), 161 (2001).

Measurement of Dissolved Oxygen Based on Enhanced Cerium(IV) Chemiluminescence
Keiichi FUJIMORI, Norimichi TAKENAKA, Hiroshi BANDOW, and Yasuaki MAEDA
Department of Applied Materials Science, College of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Osaka 599-8531, Japan
The reaction of Ce(IV) with pyrogallol caused chemiluminescence, which was enhanced by dissolved oxygen. Dissolved oxygen in water was able to help in the determination by enhancing the chemiluminescence intensity. The limit of detection calculated from 3sigma was 43 umol/dm3, and the relative standard deviation was 1.2% at 613 umol/dm3 (n = 5). The results obtained for natural and tap water samples were compared with those provided by conventional methods; the agreement between them corroborated the usefulness of the proposed method. The chemiluminescence mechanism was studied by examining the effect of interference with Cl- and measuring the chemiluminescence spectrum. The chemiluminescence emitter, however, could not be identified.