Optical Fiber Fluorometric Determination ofo-Nitrophenol
Optical Fiber Fluorometric Determination ofo-Nitrophenol
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DOI：
10.1006/mchj.1997.1521
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发表时间：
1998
影响因子：
4.8
通讯作者：
Ying Wang;W. Liu;Kemin Wang;Jianghong Tang;Feng Li;G. Shen;R. Yu
中科院分区：
文献类型：
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作者：
Ying Wang;W. Liu;Kemin Wang;Jianghong Tang;Feng Li;G. Shen;R. Yu
摘要2-（4-二苯基）-6-苯基苯并恶唑（PBBO）作为荧光团被引入到增塑聚合物膜中，用于光学传感邻硝基苯酚。PBBO膜的响应表现出令人满意的分析特性与姜黄素固定化膜相比。从水相到膜相的单硝基酚的萃取导致由于络合物的形成而导致荧光强度的降低。通过log（ΔF/F）-log（浓度）曲线估算络合物组成和猝灭常数。邻硝基苯酚在pH4.04 -5.93缓冲溶液中有最大响应。在最佳实验条件下，邻硝基苯酚浓度在2 × 10 - 6 ~ 1.2 × 10 - 4 mol/L-1范围内呈线性关系，响应时间短，重现性和可逆性好。对环境水样中可能存在的干扰物进行了测定。该传感器可用于含干扰物样品中邻硝基苯酚的测定，回收率令人满意。
Abstract 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.