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| Effect of peanut quality and oil production process on aflatoxin content in crude oil, cake and mealcrude oil, cake and meal |
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| DOI： |
| KeyWord:peanut kernel aflatoxin B1（AFB1） aflatoxin total (AFT) content crude peanut oil peanut cake and meal |
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| Abstract: |
| Aflatoxin B1 (AFB1) and the total content of aflatoxin B1, B2, G1 and G2 (AFT) in 24 peanut kernels from peanut oil processing enterprises in different regions were tested. Three peanut kernels with different AFT contents were selected to extract oil by low temperature pressing, high-temperature pressing and hexane solvent extraction, respectively, and the AFT contents in crude peanut oil, cake and meal obtained from different oil production processes was examined. The effects of peanut quality and oil production process on AFT contents in crude oil, meal and cake were analyzed. The migration of AFT from peanut kernel to crude oil, cake and meal during different oil production processes was discussed. The results showed that the contents of AFB1 and AFT in 23 peanut kernels were 12.45-33.16 μg/kg and 14.57-40.48 μg/kg, with the average contents of 20.54 μg/kg and 23.45 μg/kg respectively. The contents of AFB1 and AFT in color-selected moldy peanut sample were 91.22 μg/kg and 99.61 μg/kg, respectively. The AFT contents in crude oils obtained by cold pressing, hot pressing and solvent extraction from three peanut kernels with the AFT content of 14.57, 40.48, 99.61 μg/kg were 0.48-40.94 μg/kg, 0.51-52.82 μg/kg and 0.34-13.42 μg/kg, and the average values were 13.97, 18.06, 4.71 μg/kg, which accounted for 27.10%, 35.03% and 914% of the average AFT content in the peanut kernels, respectively. The AFT content in crude pressed oil was significantly higher than that in crude solvent extracted oil. The average AFB1 content in three crude oils obtained from high quality (AFB1 content 12.45 μg/kg) peanut kernel was 044 μg/kg, which only accounted for 3.53% of AFB1 content in peanut kernel. The average AFB1 content in three crude oils from moldy peanuts obtained from color selection was 33.39 μg/kg, which accounted for 3660% of AFB1 content in peanut kernels, 1.70 times higher than the limitation of national standard. The AFT contents in hot pressed peanut cake, cold pressed cake and solvent extracted meal were 11.82-57.96 μg/kg, 9.51-52.06 μg/kg and 16.67-100.00 μg/kg respectively, and the average values were 30.25, 25.83 μg/kg and 54.62 μg/kg respectively, which accounted for 58.68%, 5010% and 105.96% of the average AFT content in the peanut kernels. The AFT content in solvent extracted meal was higher than that in pressed cake, and the migration rate and enrichment of AFT in peanut cakes and meals were significantly higher than those in crude peanut oil. In summary, the selection of peanut raw materials and strict color selection were the key point to prevent the AFB1 content exceeding the national standard in peanut oil and peanut cake and meal during peanut oil production. |
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