稻米油加工过程营养成分及有害物质变化趋势研究

Study on the trends of nutrients and harmful substance in rice bran oil processing

研究在加工过程中稻米油内营养成分及有害物质的变化趋势。采集三家稻米油工厂毛油和脱胶、脱蜡、脱酸、脱色、脱脂精炼工段的稻米油样品各3个批次,测定其维生素E(VE)、谷维素及甾醇三种营养物质和苯并芘(BaP)、3-氯-1,2-丙二醇(3-MCPD)两种有害物质含量,研究其变化趋势。与毛油相比,稻米油精炼后维生素E含量下降了37.92%,谷维素含量下降了23.05%,甾醇含量下降了22.69%,BaP含量下降了97.61%,3-MCPD含量下降了80.47%。稻米油加工过程会导致BaP和3-MCPD有害物质产生,且3-MCPD在精炼过程中整体呈减少趋势;同时,稻米油中VE、谷维素和甾醇也有不同程度的减少。

To understand the trends of nutrients and harmful substances in the processing of rice bran oil(RBO).Three batches of RBO samples from three RBO factories,including crude oil,degum ming,dewaxing,deacidification,decolorization and degreasing were collected,Measurement of its vita min E,oryzanol and sterol and two harmful substances.Study its trends.Two harmful matters including benzopyrene(BaP),3-chloro-1,2-propanediol(3-MCPD)and three nutritional contents including vita min E,oryzanol,sterol were determined.The trends of these substances change were studied.The vita min E decreased by 37.92%,oryzanol decreased by 23.05%,sterol decreased by 22.69%,BaP content of RBO decreased by 97.61%,3-MCPD decreased by 80.47%,when compared with crude oil.BaP and 3-MCPD are produced,3-MCPD shows a decreasing trend,and vita min E,oryzanol,sterol are decrease with different degrees during the processing of RBO.