食品科学 ›› 2018, Vol. 39 ›› Issue (4): 268-274.doi: 10.7506/spkx1002-6630-201804040

• 工艺技术 • 上一篇    下一篇

亚临界丁烷萃取小麦麸皮油工艺优化及其成分分析

张志国,田鑫   

  1. (齐鲁工业大学食品科学与工程学院,山东济南 250353)
  • 出版日期:2018-02-25 发布日期:2018-02-02
  • 基金资助:
    山东省重点研发计划项目(2015GNC113012);山东省科技成果转化项目(鲁财农指[2014]120号); 山东省自然科学基金项目(2016ZRB01AVK)

Optimization of Subcritical Butane Extraction and Chemical Composition of Wheat Bran Oil

ZHANG Zhiguo, TIAN Xin   

  1. (College of Food Science and Engineering, Qilu University of Technology, Jinan 250353, China)
  • Online:2018-02-25 Published:2018-02-02

摘要: 采用亚临界丁烷萃取技术及Box-Behnken响应面试验方法对影响小麦麸皮油提取率的因素进行优化,并获得最佳工艺条件为萃取温度40℃、萃取时间30min、料液比1∶3(g/mL)、萃取3次。利用气相色谱-质谱联用法对亚临界丁烷萃取的小麦麸皮油成分进行分析,通过将各组分的质谱数据与标准谱库比对进行定性;采用面积归一化法确定各组分的相对含量。经检测,共鉴定出23种成分,其中17种为脂肪酸酯,5种为甾醇类化合物。脂肪酸酯占所测总组分含量的78.17%,其中相对含量较高的5种脂肪酸甲酯为棕榈酸甲酯、亚油酸甲酯、油酸甲酯、硬脂酸甲酯和9-二十碳烯酸甲酯,分别占总组分含量的11.22%、41.77%、13.36%、2.87%和1.99%。甾醇类化合物占所测总组分含量的19.35%,其中相对含量较高的4种甾醇为β-谷甾醇、豆甾烷醇、麦角甾烷醇和菜油甾醇,分别占总组分含量的8.13%、4.73%、3.42%和2.30%。

关键词: 小麦麸皮, 亚临界, 响应面优化, 气相色谱-质谱法, 成分分析

Abstract: The subcritical butane extraction of wheat bran oil was optimized using response surface methodology with a Box-Behnken design. The optimum extraction conditions were determined as follows: extraction temperature 40 ℃, solvent-to-solid ratio 1:3 (g/mL), extraction time 30 min, and 3 extraction cycles. The chemical composition of the oil extracted under these conditions was detected by gas chromatography-mass spectrometry (GC-MS); qualitative analysis was performed by comparing the mass spectra of analytes with the standard spectra in a mass spectral database and quantitative analysis by area normalization method. A total of 23 components were identified, including 17 fatty acid esters (78.17%) and 5 sterol compounds (19.35%). The main fatty acid methyl esters were methyl ester (11.22%), methyl linoleate (41.77%), methyl oleate (13.36%), methyl stearate (2.87%) and methyl 9-eicosanoate (1.99%). The major sterol compounds were β-sitosterol (8.13%), stigmastanol (4.73%), ergostanol (3.42%) and campesterol (2.30%).

Key words: wheat bran, subcritical, response surface methodology optimization, gas chromatography-mass spectrometry (GC-MS), fatty acid composition

中图分类号: