Abstract | OBJECTIVE: METHODS: UV-Vis absorption during photodegradation was monitored with a Unico 2102 spectrophotometer. Organic content of samples was measured with a Shimadzu TOC 4100. Phototoxicity tests were carried out using Saccharomyces cerevisiae with the methods modified from Daniels. RESULTS: When phloxine B and uranine degraded in solution, their apparent rate constant k was 0.0019 and 0.0027 min(-1), respectively. The total organic carbon (TOC) content decreased by approximately 50% during the 8 h irradiation period, which led to a gradual decrease in phototoxicity of the residues. The photodegradation of photosensitizers on the surface of silica TLC plates was much faster than that in the solution. The apparent rate constant k and the half life of phloxine B were 0.0073 min(-1) and 95 min, respectively. CONCLUSION:
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Authors | Hong Wang, Wan-Xian Wang, Yi Yang, Wei-Min Cai |
Journal | Biomedical and environmental sciences : BES
(Biomed Environ Sci)
Vol. 21
Issue 5
Pg. 438-41
(Oct 2008)
ISSN: 0895-3988 [Print] China |
PMID | 19133619
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Photosensitizing Agents
- Eosine I Bluish
- Fluorescein
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Topics |
- Eosine I Bluish
(chemistry, toxicity)
- Fluorescein
(chemistry, toxicity)
- Kinetics
- Molecular Structure
- Photolysis
- Photosensitizing Agents
(toxicity)
- Saccharomyces cerevisiae
(drug effects, radiation effects)
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