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| 不同山核桃及其油脂品质对比分析 |
| Comparison in qualities of different China pecans and China pecan oils |
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| DOI： |
| 中文关键词: 山核桃 山核桃油 理化性质 脂肪酸组成 维生素E |
| 英文关键词:China pecan China pecan oil physicochemical property fatty acid composition vitamin E |
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| 中文摘要: |
| 以东北、云南和川藏3个地区的11种山核桃仁为原料，通过冷榨机压榨得到冷榨山核桃油，分析山核桃仁的理化指标，山核桃油的理化指标、脂肪酸和维生素E组成及含量。结果表明：山核桃平均含仁率为19.14%，山核桃仁平均粗脂肪含量为60.99%、粗蛋白质含量为20.52%；冷榨山核桃油平均酸值（KOH）为0.25 mg/g、过氧化值为2.96 mmol/kg、碘值(I)为156.68 g/100 g、皂化值（KOH）为188.80 mg/g；冷榨山核桃油主要不饱和脂肪酸平均含量为93.562％，其中油酸24497％、亚油酸59.952％、亚麻酸8.804％；冷榨山核桃油中δ-维生素E平均含量为430.427 μg/kg，最高含量达到619.442 μg/kg，未检测到α-维生素E。表明冷榨山核桃油的各项理化指标符合食用油脂的要求，且具有较高的营养价值。 |
| 英文摘要: |
| With eleven kinds of China pecan kernels from areas of Northeast，Yunnan and Sichuan-Tibet as raw materials，the China pecan oil was obtained by cold-pressing. The physicochemical properties of China pecan kernel and China pecan oil，the compositions and contents of fatty acid and vitamin E in China pecan oil were analyzed. The results showed that the average kernel content of China pecan was 1914%. The average crude fat content and crude protein content of China pecan kernel were 60.99% and 20.52% respectively. The average acid value, peroxide value, indine value and saponification value of cold pressed China pecan oil were 0.25 mgKOH/g, 2.96 mmol/kg, 156.68 gI/100 g and 188.80 mgKOH/g, respectively.The average content of unsaturated fatty acids in cold pressed China pecan oil was 93.562%, and the contents of oleic acid，linoleic acid and linolenic acid were 24.497%，59952% and 8.804%, respectively. The average content and the highest content of δ-vitamin E in cold pressed China pecan oil were 430.427 μg/kg and 619.442 μg/kg, respectively, but α-vitamin E was not detected. It indicated that the physicochemical indexes of cold pressed China pecan oil met the requirements of edible oil and had high nutritional value. |
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