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| Analysis and comparison of nutritional components of Juglans regia oil and Juglans sigillata oil from different producing areas in China |
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| KeyWord:Juglans regia oil Juglans sigillata oil producing area nutritional component |
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| Abstract: |
| In order to reveal the difference of nutritional components in different varieties of walnut oil, Juglans regia samples from 9 producing areas and Juglans sigillata from 7 producing areas were used as raw materials to prepare oil, and the nutritional components in Juglans regia oil and Juglans sigillata oil from different producing areas were analyzed and compared by determining the quality indexes, fatty acid composition, and VE, sterol and squalene contents of Juglans regia oil and Juglans sigillata oil. The results showed that the acid value and peroxide value of walnut oil met the requirements of national standard. The fatty acid compositions of Juglans regia oil and Juglans sigillata oil met the national standard of walnut oil, mainly linoleic acid, oleic acid and α -linolenic acid. The α-linolenic acid contents of Juglans regia oils from Hanzhong of Shaanxi province, Chuxiong of Yunnan province and Juglans sigillata oil from Baishan of Jilin province were higher than 11%. The total VE contents in Juglans regia oil and Juglans sigillata oil were 30.81-4221 mg/100 g and 31.00-57.52 mg/100 g, respectively, and it was mainly γ-tocopherol. The Juglans sigillata oil from Lincang of Yunnan province had the highest γ-tocopherol content (51.60 mg/100 g). The total sterol contents in Juglans regia oil and Juglans sigillata oil were 346.91-485.20 mg/kg and 403.34-656.15 mg/kg, respectively, and it was mainly β-sitosterol. The squalene contents of Juglans regia oil and Juglans sigillata oil were 6.7-11.3 mg/kg and 6.9-8.3 mg/kg, respectively. The average contents of oleic acid, total VE and total sterol in Juglans sigillata oil were higher than those in Juglans regia oil, but the average content of squalene was lower than that in Juglans regia oil. |
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