谷糠油成分的超临界CO2流体萃取及GC-MS分析

采用超临界CO2流体萃取法从谷糠中萃取谷糠油，用气相色谱-质谱联用技术对其甲酯化产物进行分析，用归一化法测定其相对百分含量。结果表明：最适宜的萃取工艺条件为萃取压力30MPa，萃取温度45℃，萃取时间70min。谷糠油中共鉴定出18种成分，其中三十六烷占28.42%、2,6-二叔丁基对甲酚占19.6%、油酸甲酯占7.77%、2,4-二叔丁基-6-甲基苯酚占6.06%、亚油酸甲酯占5.16%。

Supercritical Fluid Extraction and GC-MS Analysis of Oil from Millet Bran

The optimum technological parameters for supercritical fluid extraction (SFE) of oil from millet bran were investigated using orthogonal array design. Along with this, methyl esterified millet bran oil was analyzed for chemical composition by GC-MS and chemical compounds were quantitatively determined using an external calibration method. The optimal values of SFE parameters were extraction pressure 30 MPa and temperature 45 ℃for an extraction duration of 70 min. There were totally 18 compounds identified in millet bran oil with the following relative contents: hexatriacontane 28.42%, 2,6-Di-tert-butyl-4-methylphenol 19.6%, methyl oleate 7.77%, 2,4-Di-tert-butyl-6-methylphenol 6.06%, and methyl linoleate 5.16%.