期刊
MOLECULES
卷 22, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/molecules22030347
关键词
gamma radiation; herbs; phenolic compounds; aflatoxin B1; ochratoxin A; chromatography
资金
- Ministry of Agriculture, Portugal (Project AROMAP-PRODER/FEADER/EU)
- Foundation for Science and Technology (FCT, Portugal) [Pest-OE/AGR/UI0690/2015, SFRH/BPD/107855/2015]
- FEDER
- FCT [RECI/AAG-TEC/0400/2012, UID/Multi/04349/2013]
- Spanish Government [AGL2015-64522-C2-2-R]
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 Palau 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.
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