On-line determination of 4-nitrophenol by combining molecularly imprinted solid-phase extraction and fiber-optic spectrophotometry.
In the present paper, we describe a new on-line SPE system where molecular imprinting, fiber-optic detection and flow injection analysis were combined for the first time. This new system has been applied for the on line detection of 4-nitrophenol (4-NP). Initially, molecularly imprinted polymers (MIP) have been prepared for the selective extraction of 4-NP using 4-vinylpyridine and ethylene glycol dimethacrylate as functional and cross-linking monomers, respectively. Selective extraction was achieved using the designed MIP with 97% of recovery on imprinted polymer and 10% on control polymer. The system provided a high degree of accuracy, with RSDs varying between 0.7 and 1.39%. In respect of accuracy, reproducibility, and rapidity, this system is comparable with HPLC. In short, the system allows simple, fast, and accurate analyte determination with the possibility of future automation.
College of Chemistry and Chemical Engineering, Xinjiang University, Xinjiang Key laboratory of Oil and Gas Fine Chemicals, Urumqi, People's Republic of China; UEKAE-BILGEM-The Scientific and Technological Research Council of Turkey (TUBITAK), Gebze/Kocaeli, Turkey.
Turghun
T
Muhammad
Osmanjan
O
Yimit
Yunusjan
Y
Turahun
Kipayem
K
Muhammad
Yildiz
Y
Uludağ
Zhongkui
Z
Zhao
4-Nitrophenol; Fiber-optic system; Molecularly imprinted polymers; Solid-phase extraction