DECONTAMINATION OF AFLATOXINS IN VEGETABLE OILS USING ACTIVATED CHARCOAL AND IMARSIL
Keywords:
Activated charcoal, Adsorbent, Aflatoxicosis, Imarsil®, Inexpensive, RefiningAbstract
Infestation of vegetable oils by mycotoxins affects its quality and general acceptability thereby resulting in huge economic losses in addition to being hazardous to consumer health. To screen, and remove aflatoxins (AF) in vegetable oils using inexpensive, readily available adsorbents [imarsil® and activated charcoal (AC)], edible commercial vegetable oils from ten plant sources (cotton, sunflower, canola, palm-kernel, olive, groundnut, soya-bean, coconut, palm and corn) obtained from Nigerian markets were assessed for aflatoxin (AF) levels using High Performance Liquid Chromatography (HPLC) method. Adsorption studies of AF were performed on the AF positive oils using imarsil® and activated charcoal (AC) at 2 and 3% concentrations under 1 and 3 hours contact time. AF concentrations were: corn oil 157 µg/kg, coconut oil 49 µg/kg, olive oil 33 µg/kg, soya oil 28 µg/kg, palm kernel oil 9 µg/kg, palm oil 5 µg/kg and groundnut oil 4 µg/kg, while cotton, sunflower and canola oils had no detectable AF levels. At ≤ 9 µg/kg AF contamination rate, both imarsil® and AC exhibited 100% adsorption efficiency within one hour. At AF contamination rates of 28-157 µg/kg, AC was not effective while imarsil® had 100% removal efficiency in 3 hours. The study therefore revealed that incorporating imarsil® into the oil refining process could help in the management of aflatoxicosis globally.
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