Aflatoxin in peanut oil
1980
Supatra Munsakul | Mayuree Paklamjeak
Raw peanut oil has a high consumption rate even if it has not been processed. Hence the crude oil obtained from mouldy peanuts always contains aflatoxin. In most cases, the content is higher than 20 ppb (ug/kg), the minimum safety margin required by the Ministry of Public Health. There are many kinds of treatments in eliminating aflatoxin as solvent in peanut oil, none of which is suitable for industrial application. Although the refining process efficiently removes most of the aflatoxin, if not all, still the refined oil is not acceptable because the peanut odour is completely eradicated. Two types of treatment with regard to refining processes have been tried with the following results: (1) The removal of free fatty acid by means of neutralization does not change the amount of aflatoxin content. (2) The application of Fuller's earth to the amount of 1, 2 or 3% of the crude oil can reduce an aflatoxin content of 30-50 ppb to less than 20 ppb, particularly if an amount of Fuller's earth of only 1% of crude oil is applied, then it can also effectively maintain the odour of peanut.
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