Flow injection analysis of volatile phenols in environmental water samples using CdTe/ZnSe nanocrystals as a fluorescent probe
| Autor: | Fang Xia, Ding Zhang, Rong-Jie Zhang, Ying-Fan Liu, Wen-Hao Zhang |
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| Rok vydání: | 2011 |
| Předmět: |
Detection limit
Flow injection analysis Volatile Organic Compounds Quenching (fluorescence) Aqueous solution Absorption spectroscopy Surface Properties Metal ions in aqueous solution Analytical chemistry Biochemistry Fluorescence Analytical Chemistry chemistry.chemical_compound Phenols chemistry Zinc Compounds Flow Injection Analysis Cadmium Compounds Nanoparticles Phenol Particle Size Tellurium Selenium Compounds Water Pollutants Chemical Fluorescent Dyes |
| Zdroj: | Analytical and Bioanalytical Chemistry. 402:895-901 |
| ISSN: | 1618-2650 1618-2642 |
| DOI: | 10.1007/s00216-011-5477-2 |
| Popis: | On the basis of flow injection analysis technology, a simple, accurate, and sensitive method has been developed for the determination of volatile phenols in environmental water samples by using CdTe/ZnSe nanocrystals as a fluorescent probe. The influences of coexisting metal ions and volatile phenol substitutes were also investigated. The method developed for analysis of volatile phenols displayed very good linearity in the range from 1.0 × 10(-8) to 4.0 × 10(-7) g L(-1), with a correlation coefficient greater than 0.995 and a detection limit down to 2.7 × 10(-9) g L(-1) (signal-to-noise ratio 3). The proposed method was successfully applied to determine the content of volatile phenols in environmental water samples, and the quantitative recoveries were 93.4-106.1%. A possible reaction mechanism for the quenching of fluorescence is discussed using UV-vis absorption spectra, fluorescence spectra, and time-resolved luminescence spectra of volatile phenols obtained by titrating a CdTe/ZnSe nanocrystal aqueous solution and zeta potential data. |
| Databáze: | OpenAIRE |
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