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Method Development for the Sample Preparation and Quantitative Analysis of Synthetic Colors in Foods  

Park, Sung-Kwan (Food Additives Division, Korea Food and Drug Administration)
Lee, Tal-Su (Food Additives Division, Korea Food and Drug Administration)
Park, Seung-Kook (Department of Food Science and Biotechnology, Kyung Hee University)
Publication Information
Korean Journal of Food Science and Technology / v.36, no.6, 2004 , pp. 893-899 More about this Journal
Abstract
Method for sample preparation and quantitative analysis of 19 permitted and non-permitted synthetic colors in foods was developed based on reversed-phase ion-pairing high performance liquid chromatography. For color extraction of samples, deionized water was added, and pH was appropriately adjusted with 1% ammonia water. Any undissolved matters were extracted with 50% ethanol or 70% methanol. Lipid in snacks was first removed using n-hexane with centrifugation, water was added to extract colors, followed by clean-up and concentration using Sep-Pak $C_{18}$ cartridge. Recovery efficiencies at known concentrations of 19 standard food colors spiked into foods were in 90.3-97.9% range far soft drink, 79.2-101.9% for candy, 84.1-103.4% for jelly, 86.4-100.8% for chewing gum, 83.5-103.4% for ice cream, and 78.5-95.6% for snack.
Keywords
synthetic food colors; sample preparation; ion-pairing HPLC;
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