コメ中のフモニシンB1, B2, B3の液体クロマトグラフィーによる定量

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  • Liquid chromatographic determination of fumonisins B1, B2, and B3 in rice

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Rice is susceptible to the fungus Gibberella fujikuroi, the anamorph of which is taxonomically near to Fusarium verticillioides, a major fumonisin producer, so that the potential risk of fumonisin contamination in rice is significant. However, most works on fumonisins have examined corn or wheat and there have not been any practical methods developed for the analysis of fumonisins in rice. This paper describes the development of liquid chromatographic determination methods with an efficient extraction procedure for fumonisins (fumonisin B1, B2, and B3) in rice, using artificially molded rice contaminated with fumonisins. Applied with submergence extraction, stable and sufficient recovery was achieved for various rice samples in spike and recovery tests. The determination was done by liquid chromatography using fluorescence detection (HPLC-FL) with precolumn derivatization, or using tandem mass spectrometry (LC-MS/MS). The limit of detection achieved by LC-MS/MS was ten times lower than that by HPLC-FL for fumonisin B1.

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