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Headspace Analysis for Residual Hexane in Vegetable Oil  

Oh, Chang-Hwan (Research Institute of Lab Frontier Corp.)
Kwon, Yong-Kwan (Food Additive Evaluation Department, Korea Food & Drug Administration)
Jang, Young-Mi (Food Additive Evaluation Department, Korea Food & Drug Administration)
Lee, Dal-Su (Food Additive Evaluation Department, Korea Food & Drug Administration)
Park, Jong-Sei (Research Institute of Lab Frontier Corp.)
Publication Information
Food Science and Biotechnology / v.14, no.4, 2005 , pp. 456-460 More about this Journal
Abstract
To enforce the maximum residue limit for residual hexane (0.005 g/kg) in commercially available Korean vegetable oil, convenient and accurate quantification methods were investigated. Using dual surrogate standards, pentane and heptane were dissolved in ethanol, and then added to hexane-tree sunflower oil for setting up the calibration curve. Gas Chromatograph-Flame Ionization Detector with a porous layer open tubular column, indicated good chromatographic separation of hexane from other inhibiting matrix components. The lowest calibration level was $0.5\;{\mu}g/g$, not exceeding a relative standard deviation of 10% (RSD%), and 1.0\;{\mu}g/g$ not exceeding a deviation of 22% RSD% using heptane as an internal standard for the Static headspace analysis by using a headspace auto-sampler and manual injection, respectively. The residual hexane was detected in nine of the samples among 87 vegetable oil samples purchased on the local market.
Keywords
hexane; static headspace analysis; porous layer open tubular column; vegetable oil; monitoring;
Citations & Related Records

Times Cited By Web Of Science : 4  (Related Records In Web of Science)
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