Citation: Min Fang, Fang Lei, Jia Zhou, Yong-Ning Wu, Zhi-Yong Gong. Rapid, simple and selective determination of 2,4-dinitrophenol by molecularly imprinted spin column extraction coupled with fluorescence detection[J]. Chinese Chemical Letters, ;2014, 25(11): 1492-1494. doi: 10.1016/j.cclet.2014.06.015 shu

Rapid, simple and selective determination of 2,4-dinitrophenol by molecularly imprinted spin column extraction coupled with fluorescence detection

Min Fang ^a,b ,
Fang Lei ^a ,
Jia Zhou ^a ,
Yong-Ning Wu ^c ,
Zhi-Yong Gong ^a,b,,

1.
a Institute of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China;
2.
b Hubei Collaborative Innovation Center for Processing of Agricultural Products, Wuhan Polytechnic University, Wuhan 430023, China;
3.
c China National Center for Food Safety Risk Assessment, Beijing 100050, China

Corresponding author: Zhi-Yong Gong,
Received Date: 11 April 2014
Available Online: 11 June 2014
Fund Project: This work was supported by National Key Technology R&D Program in the 11th Five-Year Plan of China (No. 2009BADB9B02) (No. 2009BADB9B02)

A rapid, simple and selective method based on molecularly imprinted, spin column extraction coupled with fluorescence detection was successfully established for the determination of 2,4-dinitrophenol in serum samples. The 2,4-dinitrophenol imprinted polymers exhibited highly selective recognition for the template molecule and the maximum adsorption capacity was 138.9 μg/g. The results indicated that when water is used as the loading solution, only 2,4-dinitrophenol could be adsorbed on the spin column without the remaining structural analogs (2-nitrophenol, 4-nitrophenol and phenol). After eluting with acetonitrile/acetic acid (9/1, v/v), 2,4-dinitrophenol in serum samples could be determined by using the fluorescence spectrometer, based on the fluorescence enhancement of fluorescein by the template molecule. Under the optimal conditions, the spiked recovery ranged from 95.8% to 103.4% and the detection limit was 1 nmol/L. The results confirmed the reliability and practicality of the protocol and revealed a good perspective of this method for biological sample analysis.
- Molecularly imprinted solid phase,
- extraction,
- Indirect fluorescence detection,
- Spin column,
- 2,4-Dinitrophenol
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