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| Effect of different oil-producing technologies on polycyclic aromatic hydrocarbons content in crude vegetable oil |
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| DOI： |
| KeyWord:polycyclic aromatic hydrocarbons peeled oilseed pressed crude oil extracted crude oil |
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| Abstract: |
| The peanut kernel, sesame and rapeseed were used as raw materials to prepare crude oils by different oil-producing technologies. Then, the PAHs contents in the crude oils were detected and analyzed to study the effect of different oil-producing technologies on PAHs content in crude oil. The results showed that the average contents of BaP, PAH4 and PAH16 in six extracted crude oils were 1.53, 1.45 times and 1.08 times as much as those in pressed crude oils, respectively. The possible reason was that PAHs had good solubility in n-hexane.Therefore, the PAHs contents in extracted crude oils were higher than those in pressed crude oils whether the oilseeds were peeled or not. The average contents of BaP, PAH4 and PAH16 in six crude oils derived from the peeled oilseeds were 1.51, 1.61 times and 1.53 times as much as those in crude oils derived from the whole oilseeds, respectively. Therefore, the PAHs contents in crude oils derived from peeled oilseeds were higher than those in crude oils derived from whole oilseeds whether the crude oils were produced by leaching or pressing. The possible reason was that the main component of oilseed coat was crude fiber, resulting that the lipophilic PAHs were more easily accumulated in the kernel. |
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