Determination of 4-Methylimidazole in Liquid Seasoning by Solid Phase Extraction Combined with Gas Chromatography/Selected Ion Mass
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Abstract:
A simple and sensitive method was developed for determination of 4-methylimidazole in liquid seasoning samples by solid phase extraction (SPE) with selected ion mass-gas chromatography mass spectrometry (SIM-GCMS). In this work, effects of solution pH, type and volume of elution solvents were investigated to optimize extraction conditions. Under the optimized SPE conditions, the relative standard deviation (RSD, n=5) for the samples was 7.5%. The coefficient of determination for calibration curve was 0.99985. The method detection limit was 7.27 μg/kg. The method was applied to real samples and the recovery of 80.3~86.2 % was obtained.
