期刊
JOURNAL OF SEPARATION SCIENCE
卷 41, 期 17, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201800559
关键词
4-methylimidazole; caramel color; dispersive liquid-liquid microextraction; red ginseng
资金
- Korea Food Research Institute [E0186800-01]
- Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, Forestry and Fisheries (IPET) through High Value-added Food Technology Development Program
- Ministry of Agriculture, Food, and Rural Affairs (MAFRA) [316050-03]
- National Research Council of Science & Technology (NST), Republic of Korea [E0186800-01] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A rapid analytical method was developed for the determination of 4-methylimidazole from red ginseng products containing caramel colors by using dispersive liquid-liquid microextraction with in situ derivatization followed by gas chromatography with mass spectrometry. Chloroform and acetonitrile were selected as the extraction and dispersive solvents, and based on the extraction efficiency, their optimum volumes were 200 and 100L, respectively. The optimum volumes of the derivatizing agent (isobutyl chloroformate) and catalyst (pyridine), pH, and concentration of NaCl in the sample solution were determined to be 25 and 100L, pH7.6, and 0%w/v, respectively. Validation of the optimized method showed good linearity (R-2>0.999), accuracy (89.86%), intra- (6.70%) and interday (4.17%) repeatability, limit of detection (0.96g/L), and limit of quantification (5.79g/L). The validated method was applied to quantify 4-methylimidazole in red ginseng juices and concentrates, 4-methylimidazole was only found in red ginseng juices containing caramel colorant (42.91-2863.4g/L) and detected in red ginseng concentrates containing >1% caramel colorant.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据