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投稿时间：2021-03-19
投稿时间：2021-03-19
中文摘要: 以藜麦为原料，藜麦甾醇得率为考察指标，利用超临界CO2-皂化法萃取藜麦甾醇，通过单因素和正交试验确定最佳提取工艺条件，利用气相色谱串联质谱法（gas chromatography-mass spectrometer，GC-MS）对藜麦油脂进行成分分析。结果表明，提取藜麦甾醇的最佳条件为：萃取压力25 MPa、萃取温度50℃、萃取时间2.0 h，在此条件下，藜麦甾醇的得率可达20.20 mg/g。从藜麦油脂中共分离鉴定出29种脂肪酸，其中主要的脂肪酸为亚油酸、亚麻酸和油酸，不饱和脂肪酸的含量为74.59%，超长链脂肪酸含量高达27.66%，是其它品种藜麦含量的2倍；支链脂肪酸的含量达0.63%。该研究为藜麦的深度开发和质量评价提供理论依据。
中文关键词: 藜麦 甾醇 提取 超临界CO2-皂化法 脂肪酸
Abstract:Using quinoa as a raw material and the quinoa sterol yield as a test index，quinoa sterols were extracted by a supercritical CO2-saponification method involving a single factor and an orthogonal experiment，and the components of quinoa oil were analyzed by gas chromatography-mass spectrometry.The results demonstrate that the optimal conditions were extraction pressure of 25 MPa，extraction temperature of 50 ℃，and extraction time of 2.0 h.Under the optimized conditions，the quinoa oil yield was 20.20 mg/g.A total of 29 fatty acids were isolated from the quinoa oil and identified，with the major components being:linoleic acid，linolenic acid，and oleic acid.The unsaturated fatty acid content was 74.59%，while very long-chain fatty acids accounted for 27.66%，which was twice that of other quinoa varieties;branched-chain fatty acids comprised 0.63%.This study provides a theoretical basis for the further development and quality evaluation of quinoa.
文章编号：202115023 中图分类号： 文献标志码：
基金项目:
| Author Name | Affiliation |
| LIU Ya-qian，LI Lin，SUN Wan-cheng，LUO Yi-hao | College of Agriculture and Animal Husbandry，Qinghai University，Xining 810016，Qinghai，China |
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