| Autor: |
Kemin Wang, Ying Wang, Wan Hui Liu, Jiang Hong Tang, Guo Li Shen, Ru Qin Yu, Feng Guo Li |
| Rok vydání: |
1998 |
| Předmět: |
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| Zdroj: |
Microchemical Journal. 58:90-98 |
| ISSN: |
0026-265X |
| DOI: |
10.1006/mchj.1997.1521 |
| Popis: |
2-(4-Diphenylyl)-6-phenylbenzoxazole (PBBO) has been incorporated into plasticized polymeric membrane as the fluorophore for optically sensingo-nitrophenol. The responses of the PBBO membrane showed satisfactory analytical characteristics in comparison with a membrane immobilized with curcumin. Extraction of mononitrophenols from the aqueous phase into the membrane phase results in a decrease in fluorescence intensity owing to complex formation. Complex composition and quenching constant were estimated by log(ΔF/F)–log(concentration) plots. The maximum response foro-nitrophenol was obtained in pH 4.04–5.93 buffer solution. Under optimum experimental conditions, the linear range of the sensor response covers theo-nitrophenol concentrations from 2 × 10−6to 1.2 × 10−4mol/liter−1with short response time and good reproducibility and reversibility. The influence of some interferants possibly existing in environmental water samples was tested. The proposed sensor can be used for the determination ofo-nitrophenol in interferant-containing samples with satisfactory recovery. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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