Postharvest treatment to control mycotoxin in coffee bean using radio frequency

Analytical results indicated the presence of ochratoxin A (OTA), aflatoxin B1, and total aflatoxins in all coffee bean samples. The concentration levels ranged from non-detectable to 46.40 μg/kg for OTA, 18.73–50.44 μg/kg for aflatoxin B1, and 10.18–31.75 μg/kg for total aflatoxins. All coffee bean samples were contaminated with both total aflatoxins and aflatoxin B1. Radio frequency (RF) treatments evaluated for the reduction of mycotoxins in coffee beans showed that applying RF at 55.00 °C for 180 seconds did not reduce the percentage of inoculated coffee beans to the same level as the non-RF-treated samples. However, high moisture content was associated with increased levels of ochratoxin A, aflatoxin B1, and total aflatoxins.