For instance, a European committee named “Codex” has defined an acceptable maximum of 4 ppb of AFT in rice. This acceptable amount for aflatoxin B1 is 5-10 ppb in feedstuffs and 4 ppb in foodstuffs. The allowed amount which has already been defined in Iran is 30 ppb for AFT and 5 ppb for AFB1 in rice. Many studies have been performed in order to control the contamination of human and animal foods through physical, chemical and biological methods.
They convert the toxin into less harmful materials with less mutagenic effects. These chemicals mainly include acids bases oxidizing agents bisulfites and gases