A Novel Aqueous Extraction for Camellia Oil by Emulsified Oil: A Frozen/Thawed Method
A Novel Aqueous Extraction for Camellia Oil by Emulsified Oil: A Frozen/Thawed Method
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乳化油水提取山茶油的新型方法：冷冻/解冻法
DOI：
10.1002/ejlt.201800431
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发表时间：
2019-04
影响因子：
2.7
通讯作者：
Deng Ze Yuan
中科院分区：
文献类型：
--
作者：
Yang Jian Yuan;Li Jing;Wang Mei;Zou Xian Guo;Peng Bin;Yin Yu Long;Deng Ze Yuan
油籽水提油过程中不可避免地会产生乳剂。本文研究了一种新的水提油茶油的方法。在提取过程中，乳化油被收集、冷冻和解冻，并获得游离油（AEEF）。最佳加工条件为：山茶籽粉的3倍水量（w/w）， 70℃下研磨6 min，重复2个循环收集乳化油；然后将乳化油冷冻（- 20°C） /解冻（50°C） 2个循环。得到的山茶油得率为89.37±0.51%，显著高于微波辅助水酶提取法（MAAEE, 83.05±1.14%），与冷压提取法（CPE, 90.85±2.05%）和溶剂提取法（SE）加精制的收率相近（p< 0.05）。此外，AEEF提取的游离油总氧化值（TOTOX） （AEEF‐oil, 6.82±0.12%）显著低于MAAEE、CEP和SE提取的游离油（p< 0.05）。与SE‐Oil和CEP‐Oil相比，AEEF‐Oil具有较高的α‐生育酚和角鲨烯含量（p< 0.05），较低的苯并(a)芘含量（p< 0.05），并且含有更多有利的天然挥发性化合物。结果表明，该方法是一种很有前途的水萃取方法。实际应用：用乳化油冷冻/解冻法提取山茶油，收率可接受。所得茶油具有高水平的生物活性成分，低含量的有害物质，和更多的特征挥发性风味化合物。AEEF是一种改进的食用油水萃取技术，无需精制和使用正己烷，具有安全、营养和环保的特点，在油茶油的工业生产中具有潜在的应用前景。水提法是一种很有前途的食用油提取技术。研究了乳化油冷冻/解冻（AEEF）法提取茶油的新工艺。与溶剂萃取、冷压萃取和微波辅助水酶萃取相比，AEEF法得到的茶油收率高，质量好，营养价值高。AEEF是一种安全、简单、环保的水萃取技术。
Emulsion is inevitable during the aqueous extraction of oil from oilseeds. In this study, a new aqueous extraction method for camellia oil is investigated. During the extraction, the emulsified oil is collected, frozen, and thawed, and the free oil is obtained (AEEF). The optimal processing conditions are as follows: three times as much water as camellia seed powder (w/w), grinding at 70 °C for 6 min, repeating 2 cycles to collect the emulsified oil; then the emulsified oil is frozen (−20 °C) /thawed (50 °C) for 2 cycles. The yield of camellia oil is 89.37 ± 0.51%, which is significantly higher (p< 0.05) than that of microwave‐assisted aqueous enzymatic extraction (MAAEE, 83.05 ± 1.14%), and is similar to that of cold press extraction (CPE, 90.85 ± 2.05%), as well as solvent extraction (SE) coupled with refining. Additionally, the total oxidation value (TOTOX) of the free oil extracted by using AEEF (AEEF‐Oil, 6.82 ± 0.12%) is significantly lower (p< 0.05) than those of MAAEE, CEP, or SE. In comparison to SE‐Oil and CEP‐Oil, AEEF‐Oil has higher (p< 0.05) contents of α‐tocopherol and squalene, and lower (p< 0.05) benzo(a)pyrene contents, and contains more favorable natural volatile compounds. The results indicate that the novel AEEF may be a promising aqueous extraction method.Practical Application: The novel aqueous extraction method for camellia oil by emulsified oil – frozen/thawed has acceptable oil yields. The obtained camellia oil has high levels of bioactive components, low contents of hazardous substances, and more characteristic volatile flavor compounds. AEEF is an improved aqueous extraction technology for edible oil without refining and using n‐hexane, which could be potentially applied in industrial production of camellia oil due to its safety, nutrition, and environment‐friendly treatments.Aqueous extraction is a promising technique for edible oil extraction from oilseeds. The novel technology of aqueous extraction for camellia oil through emulsified oil – frozen/thawed (AEEF) is investigated. In comparison to solvent extraction, cold press extraction, and microwave‐assisted aqueous enzymatic extraction of camellia oil, the obtained camellia oil by AEEF has an acceptable oil yield, high quality, and nutritional value. AEEF is a safe, simple and environmental‐friendly aqueous extraction technology.
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