摘要
选取我国西南、西北和东部三大产区的 16 种薄皮核桃分别压榨制油,测定核桃油的脂肪酸组成、甘油三酯组成、总酚、生育酚、植物甾醇和氧化稳定性指数。结果表明,不同产区核桃油的脂肪酸组成主要为亚油酸 C18∶2(51.21%~68.97%),油酸 C18∶1(12.56%~26.04%),亚麻酸 C18∶3(6.82%~15.01%)和棕榈酸 C16∶0(3.05%~8.27%),甘油三酯包含三亚酸甘油酯 LLL(27.87%~39.47%)和油酸亚油酸亚麻酸甘油酯 OLLn(17.07%~24.18%)。微量伴随物植物甾醇,生育酚和总酚含量分别为 540~1 594 mg/kg,10~1 303 mg/kg,345~2 579 mg/kg。根据与其他国家和地区的核桃油比较,可以推断出不同的种植区域地理位置和气候的差异,导致了核桃油成分的差异。在此基础上将氧化稳定性指数与脂肪酸组成、微量伴随物含量进行多元线性回归分析后,得出亚油酸,α-生育酚和总酚是影响核桃油氧化稳定性的主要因素。
A total of 16 walnut samples from different regions of China were analyzed, the fatty acid composition, triacylglycerol composition, polyphenol, tocopherol, phytosterol and oxidation stability index of the obtained walnut oil were determined. The results showed that the fatty acid composition of walnut oil in different regions of China was mainly linoleic acid(51.21%~68.97%), oleic acid(12.56%~26.04%), linolenic acid(6.82%~15.01%), and palmitic acid(3.05%~8.27%). The main triacylglycerol compositions were trilinolein(27.87%~39.47%) and oleoyl-linoleoyl-lynolenoyl-glycerol(17.07%~24.18%). The contents of trace accompaniments such as phytosterols, tocopherols and polyphenol were 540~1 594 mg/kg, 10~ 1 303 mg/kg, 345~2 579 mg/kg, respectively. According to the comparison with other regions, it can be suggested that the geographical location and climate of different planting regions lead to the differences in the composition of walnut oil. MLR analyses between oxidative stability index with fatty acid compositionsand minor components revealed that linoleic acid, α-tocopherol and polyphenol were the main factors that affect the oxidative stability of the walnut oil.
作者
周张涛
高盼
章景志
何东平
ZHOU Zhang-tao;GAO Pan;ZHANG Jing-zhi;HE Dong-ping(College of Food Science and Engineering,Wuhan Polytechnic University,Wuhan Hubei 430023;Key Laboratory of Deep Processing of Major Grain and Oil of Education(Wuhan Polytechnic University),Wuhan Hubei 430023;Hubei Guicuiyuan Agroforestry Co.,Ltd,Xiangyang Hubei 441600)
出处
《粮油食品科技》
2020年第1期17-22,共6页
Science and Technology of Cereals,Oils and Foods
基金
湖北省重大科技项目(鄂科技发计[2019]6号)一核桃资源高值化利用关键技术开发与应用
关键词
核桃油
不同产区
多元线性回归
成分分析
氧化稳定性指数
walnut oil
different producing areas
multiple linear regression
component analysis
oxidative stability index
