Photochemical Spectrofluorometric Determination of 2,6-Dimethylphenol Based on Monitoring Its Photo-Degradation Intermediate with TiO2 as a Catalyst.

MA Wanhong, LIU Zhihong, CAI Ruxiu

doi:10.2116/analsci.15.963

Photochemical Spectrofluorometric Determination of 2,6-Dimethylphenol Based on Monitoring Its Photo-Degradation Intermediate with TiO2 as a Catalyst.

DOI PDF Web Site Web Site Web Site 参考文献34件

MA Wanhong

Department of Chemistry, Wuhan University
LIU Zhihong

Department of Chemistry, Wuhan University
CAI Ruxiu

Department of Chemistry, Wuhan University

この論文をさがす

抄録

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.