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Mycotoxins in herbal teas marketed in Latvia and dietary exposure assessment.

Ingars ReinholdsE BogdanovaI PugajevaVadims Bartkevičs
Published in: Food additives & contaminants. Part B, Surveillance (2019)
The occurrence of 12 mycotoxins has been analysed by liquid chromatography - time of flight mass spectrometry in the batch of 60 herbal teas purchased from drugstores in Latvia. Among the dry tea samples, 90% were positive for one to eight mycotoxins. Enniatin B and deoxynivalenol (DON) were the most frequently detected mycotoxins in 55% and 45% of the samples, respectively. DON reached the highest level, from 129 µg kg-1 in herbal blend to 5,463 µg kg-1 in wormwood tea. Ochratoxin A (OTA) and aflatoxin B1 (AFB1) were found in 10% and 20% of the samples at the concentrations ranged between 2.99-30.3 µg kg-1 and 3.40-23.7 µg kg-1. Studies of the tea infusion process indicated that 32-100% of DON and zearalenone present in dry teas were extracted into the infusions. Dietary exposure assessment was performed, using the determined mycotoxin levels and the available consumption data.
Keyphrases
  • liquid chromatography
  • mass spectrometry
  • risk assessment
  • low dose
  • electronic health record
  • machine learning
  • high resolution
  • clinical evaluation
  • case control