Photochemical Spectrofluorometric Determination of 2, 6-Dimethylphenol Based on Monitoring Its Photo-Degradation Intermediate with TiO_2 as a Catalyst
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A novel spectrofluorometric method for the determination of 2,6-dimethylphenol has been developed. It is based on detecting a fluorophore intermediate produced in the course of 2,6-dimethylphenol photo-degradation with TiO2 as a catalyst. A quartz glass reactor containing the required amount of analyte, buffer and TiO2 is irradiated with UV light (<380 nm). The formed intermediate is detectable with fluorescence and UV absorption. What is more, the fluorescence intensity of the intermediate is dramatically enhanced when extracted into the CHCl3 phase. A linear calibration graph was obtained over a 2,6-dimethylphenol concentration ranging from 0.002 µg ml-1 to 0.1 µg ml-1 with a detection limit of 0.0008 µg ml-1 . Other phenolic compounds as well as those common inorganic ions do not interfere. The kinetics of the photo-degradation reaction, which followed a successive first-order reaction kinetic model, were studied using an error-compensated algorithm.
- Analytical Sciences
Analytical Sciences 15(10), 963-967, 1999-10-10
The Japan Society for Analytical Chemistry