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ORIGINAL ARTICLE
Year : 2020  |  Volume : 6  |  Issue : 1  |  Page : 106-111

Free and hidden fumonisins in hordei fructus germinatus and their transfer to the decoction


1 Ningbo Academy of Inspection and Quarantine, Ningbo, China
2 National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China

Correspondence Address:
Prof. Lan-Ping Guo
National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, No. 16 Dongzhimenneinanxiao Street, Dongcheng District, 100700 Beijing
China
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/wjtcm.wjtcm_5_20

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Objective: This study aimed to determine the free and hidden fumonisins in Hordei Fructus Germinatus samples and to investigate the transfer rates of these mycotoxins from Hordei Fructus Germinatus to its decoction. Materials and Methods: The contamination levels of free and hidden fumonisins in a total of 60 Hordei Fructus Germinatus samples were analyzed using high-performance liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS). The decoction procedure was simulated with a highly contaminated Hordei Fructus Germinatus sample, and fumonisins in the resulting decoction preparation were determined by LC-MS/MS. Results: Among all the samples, 8.3% were contaminated with free fumonisins (FB1 and/or FB2) and 13.3% were contaminated with total fumonisins (free + hidden, measured as hydrolyzed fumonisins, i.e., HFB1 and/or HFB2). The concentrations of FB1and HFB1reached up to 83 and 95 μg/kg, respectively, whereas FB2and HFB2were detected only in traces. The transfer rates of free and total fumonisins from Hordei Fructus Germinatus to the decoction were 71.8% and 83.3% for FB1and FB2, respectively. In comparison, much lower transfer rates were found for total fumonisins, i.e., 38.2% and 24.7% for HFB1and HFB2, respectively. Conclusion: The incidence and contamination levels of free and hidden fumonisins in Hordei Fructus Germinatus samples were generally low. Regarding decoction preparation, the transfer rates of free fumonisins into the decoction were high, whereas a large part of hidden fumonisins were retained in Hordei Fructus Germinatus rather than migrating into water.


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