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| Effect of corn oil deodorization on 3-MCPD esters and glycidol esters |
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| KeyWord:corn oil deodorization 3-MCPD esters glycidol esters |
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| Abstract: |
| The effects of steam distillation deodorization process and deodorization conditions on the formation of 3-MCPD esters and glycidol esters were studied with corn oil as raw material. The results showed that the contents of 3-MCPD esters and glycidol esters increased significantly during the deodorization process. With the higher deodorization temperature and the longer deodorization time, the amount of 3-MCPD esters and glycidol esters had the larger increase. The deodorization temperature had a greater influence on the formation of the two constituents than the deodorization time. Under the conditions of deodorization temperature not exceeding 230?℃ and deodorization time 60-120 min, the content of 3-MCPD esters merely increased by 0.047-2.581 mg/kg and the glycidol esters content rised barely by 0300-3.883 mg/kg. While when the deodorization temperature was 250?℃, even 60 min was applied for the deodorization, the contents of 3-MCPD esters and glycidol esters significantly increased by 5.039 mg/kg and 8.354 mg/kg, respectively. Especially in the limiting deodorization conditions of 270?℃and 120 min, the contents of 3-MCPD esters and glycidol esters in corn oil were up to 13.004 mg/kg and 34864 mg/kg, nearly 4 times and 15 times of the original level. In order to prevent and control the formation of 3-MCPD esters and glycidol esters during the deodorization process, it was necessary to reduce the deodorization temperature. |
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