| Comparing with Yunnan sigillate walnut, the fatty acid compositions of twenty-eight purple kernel walnuts samples were analysed. The results showed that the contents of palmitic acid, palmitoleic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, arachidic acid and arachidonic acid were 3.70%-7.68%, 0.02%-0.48%, 0-2.80%, 15.80%-43.16%, 44.67%-67.80%, 4.10%-10.40%, 0-0.29% and 0-0.22%,respectively.The analysis results of variation,correlation and principal component of the fatty acid content showed that the greatest variation was arachidic acid, and the less variations were palmitic acid and linoleic acid; oleic acid had great negative correlation with linoleic acid and linolenic acid; the accumulative contribution of the first three principal components reached 75.028%,which almost included the main information of all the eight fatty acids contents; the fuzzy comprehensive evaluation on fatty acid contents and nutritional characteristics of purple kernel walnut was carried out, and the fatty acid contents and nutritional values of twenty-seven purple kernel walnuts samples were higher than those of sigillate walnut. |
