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Changes of pigment content and removal of chlorophyll in soybean oil during refining process |
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KeyWord:soybean oil refining chlorophyll lutein β-carotene removal |
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Abstract: |
In order to improve the greenish and dark appearance of refined soybean oil, the contents of three pigments (lutein, β-carotene and chlorophyll) in soybean oil during the refining process were determined,and the removal of chlorophyll was investigated.The results showed that lutein and β-carotene could be completely removed under the existing refining process conditions. When the chlorophyll content in crude soybean oil was above 2.0 mg/kg, it was diffcult to reduce the content of chlorophyll to lower than 0.20 mg/kg. Adding 0.075% of activated carbon for decolorization of crude soybean oil could reduce chlorophyll content to not more than 0.20 mg/kg. In summary, the pigments in soybean oil can be basically removed by current processing methods and adjusting processing aids. |
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