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| Effect of processing aid on the content and removal efficiency of lead in oils and fats |
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| KeyWord:oils and fats refining processing aid activated clay activated carbon lead removal |
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| Abstract: |
| The effects of processing aid on the contents of lead in soybean oil，rapeseed oil and rice bran oil in refining process were studied，and the removal efficiency of lead from the excessive lead oil by adsorbent was researched. The results indicated that in the oil refining process，appropriate amount of processing aid of food grade could remove lead from edible oil effectively to ensure the content of lead in edible oil to achieve the limited level of national health standard. However，if processing aid of industrial grade or excessive processing aid was used，the content of lead in refined oil wouldn't decrease even increased，which improved the safety risk of edible oil. The content of lead in the excessive lead oil could reduce to the limited level of national health standard through adding appropriate amount of adsorbent. With the increase of the excessive range of lead content，the amount of adsorbent required in the effective removal of lead from edible oil grew. The removal efficiency of lead from edible oil by activated clay was better than that by activated carbon. |
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