"精炼过程中大豆油色素含量的变化及叶绿素的脱除 "Changes of pigment content and removal of chlorophyll in soybean oil during refining process

Abstract

为了改善成品大豆油外观发绿、发暗的情况，测定了大豆油精炼过程中3种色素（叶黄素、β-胡萝卜素和叶绿素）的含量，并研究了叶绿素的脱除。结果表明：在现有精炼工艺条件下，叶黄素、β-胡萝卜素可以被完全脱除，当大豆原油的叶绿素含量大于2.0 mg/kg时，叶绿素含量很难降到0.20 mg/kg以下；添加0.075%的活性炭对大豆原油进行脱色可使叶绿素含量不超过0.20 mg/kg。综上，通过目前加工手段及调整加工助剂，基本可以脱除大豆油中的色素。 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.

Keywords

• 大豆油；精炼；叶绿素；叶黄素；β-胡萝卜素；脱除
• soybean oil; refining; chlorophyll; lutein; β-carotene; removal