is gamma radiation suitable to preserve phenolic compounds and to decontaminate mycotoxins in aromatic plants? a case-study with aloysia citrodora paláu
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2017
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Abstract
This study aimed to determine the effect of gamma radiation on the preservation of phenolic compounds and on decontamination of dry herbs in terms of ochratoxin A (OTA) and aflatoxin B1 (AFB1), using Aloysia citrodora Paláu as a case study. For this purpose, artificially contaminated dry leaves were submitted to gamma radiation at different doses (1, 5, and 10 kGy; at dose rate of 1.7 kGy/h). Phenolic compounds were analysed by HPLC-DAD-ESI/MS and mycotoxin levels were determined by HPLC-fluorescence. Eleven phenolic compounds were identified in the samples and despite the apparent degradation of some compounds (namely verbasoside), 1 and 10 kGy doses point to a preservation of the majority of the compounds. The mean mycotoxin reduction varied between 5.3% and 9.6% for OTA and from 4.9% to 5.2% for AFB1. It was not observed a significant effect of the irradiation treatments on mycotoxin levels, and a slight degradation of the phenolic compounds in the irradiated samples was observed.
| Reference Key |
pereira2017moleculesis
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|---|---|
| Authors | ;Eliana Pereira;Lillian Barros;Amilcar L. Antonio;Sandra Cabo Verde;Celestino Santos-Buelga;Isabel C. F. R. Ferreira;Paula Rodrigues |
| Journal | Journal of ethnopharmacology |
| Year | 2017 |
| DOI |
10.3390/molecules22030347
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