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Citation: ZHANG Li-Li, LI Jie, CHEN Chang-Bao, ZHU Shu-Hua, ZHOU Jie, SHANG Peng-Peng. Preparation of Melamine Molecularly Imprinted Surface Plasmon Resonance Sensor and Its Analytical Application[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(1): 88-93. doi: 10.11895/j.issn.0253-3820.170003 shu

Preparation of Melamine Molecularly Imprinted Surface Plasmon Resonance Sensor and Its Analytical Application

College of Chemistry and Materials Science, Shandong Agricultural University, Taian 271018, China

Received Date: 3 January 2017
Revised Date: 23 November 2017

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos. 31370686, 31470686).

The melamine molecular imprinted polymer (MIP) membrane immobilized on the surface of the surface plasmon resonance (SPR) chip was prepared with allylcyanurate and ethylene glycol dimethacrylate as a functional monomer and cross-linker, respectively. Based on the ratio of the intercept to the slope of Langmuir equation for imprinted polymer, the association constant (K_ass) of imprinted sites in the imprinted film to melamine was calculated to be 1.40×10⁸ L/mol. The SPR sensor showed high selectivity to the template molecule melamine, and the best response was obtained at pH=7.5. The method showed good linearity in the melamine concentration range of 0.1-10.0 nmol/L (R=0.9991). Based on a signal to noise ratio of 3, the detection limits of melamine were 62.6 pmol/L and 56.4 pmol/L for the milk and milk powder, respectively. The recoveries were 91.5% for milk and 92.0% for milk powder. These results suggest that SPR sensing combined with MIP film is a promising alternative method for detection of melamine.
- Melamine,
- Molecular imprinting,
- Surface plasmon resonance sensor
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