Citation: WU Wei-Zhen, HUANG Meng-Xia, HUANG Qing-Da, LYU Cai-Hua, LAI Jia-Ping, SUN Hui. Molecularly Imprinted Photonic Hydrogels for Visual Detection of Methylanthranilate in Wine[J]. Chinese Journal of Analytical Chemistry, ;2019, 47(9): 1330-1336. doi: 10.19756/j.issn.0253-3820.191087
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Methylanthranilate (MA) is a kind of spice illegally added in the wine in China. The determination of MA in wine is an important quality control link. Therefore, it is of great significance to develop a rapid method for detection of prohibited spice in wine. In this work, an inverse opal structural molecularly imprinted photonic hydrogels (MIPHs) membrane was fabricated by using the photonic crystal techniques and molecular imprinting techniques. The MIPHs membrane was prepared by using methylanthranilate as template molecule, methacrylic acid as functional monomer, ethylene glycol dimethacrylate as cross linker, followed by a thermal polymerization at 60℃. Then the inverse opal structural MIPHs membrane was obtained after removing photonic crystal template and imprinted molecules. The results showed that the MIPHs membrane exhibited a good selectivity property to MA, and it responded to MA within 6 min. The Bragg diffraction peak shifted with increasing concentration of MA. A linear relationship was found between Δλ and the concentration of MA in the range from 0.1 mmol/L to 10 mmol/L. And the least detectable concentration was about 31 μmol/L. Furthermore, a color change of the MIPHs membrane couldbe observed by naked eyes. Therefore, the smart MIPHs membrane showed great potential in rapid and visual detection of MA in wine.
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