Citation: CHEN Xiao-Man, CHEN Yang, LI Gong-Ke, HU Yu-Ling, XIAO Xiao-Hua. Determination of 4-Methylimidazole and 2-Methylimidazole in Drinks by Surface-enhanced Raman Spectroscopy[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(5): 816-821. doi: 10.11895/j.issn.0253-3820.150847 shu

Determination of 4-Methylimidazole and 2-Methylimidazole in Drinks by Surface-enhanced Raman Spectroscopy

School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China

Received Date: 23 October 2015
Revised Date: 13 December 2015

Fund Project: This work was supported by the National Major Scientific Instruments and Equipments Special Project (No. 2011YQ03012409), the National Natural Science Foundation of China (Nos. 21277176, 21275168, 21127008) and the Natural Science Foundaction of Guangdong Province, China(No.2015A03011020)

A method was developed for the determination of 4-methylimidazole (4-MeI) and 2-methylimidazole (2-MeI) in drinks by surface-enhanced Raman spectroscopy with Au nanoparticle as substrate, and the detection conditions were optimized. Under the optimum conditions, by using sodium sulfate aqueous solution as agglomeration solution, and 250 or 200 μL of Au nanoparticle as substrate, the linear ranges of 4-MeI and 2-MeI were 0.05-5.00 mg/L and 1.0-20.0 mg/L with detection limits of 1.70 μg/L and 0.210 mg/L, respectively. While applied in the determination of 4-MeI and 2-MeI in drink with lift caramel, the concentration of 4-MeI was determined to be 0.093-0.110 mg/L and 2-MeI was not detected. The average recoveries of 4-MeI and 2-MeI were in the range of 80.2%-82.7% and 78.1%-93.5% with relative standard deviations <7.1%. Above all, this method was turned out to be simple, rapid and sensitive, providing a new method for rapid analysis of 4-MeI and 2-MeI in drink with lift caramel.
- Surfaced-enhanced Raman spectroscopy,
- 4-Methylimidazole,
- 2-Methylimidazole,
- Lift caramel,
- Drinks
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