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Chemical composition of walnuts from three regions in China

Oil Crop Science 2023年第1期8卷 56-60页

作者： Min Liu Xueyan Wang Yu Zhang Lin Xu Yan Liu Li Yu Fei Ma Xuefang Wang Zhiyong Gong Liangxiao Zhang Peiwu Li Key Laboratory for Deep Processing of Major Grain and Oil of Ministry of Education Wuhan Polytechnic UniversityWuhan430023China Key Laboratory of Biology and Genetic Improvement of Oil Crops Ministry of Agriculture and Rural AffairsLaboratory of Risk Assessment for Oilseed Products(Wuhan)Quality Inspection and Test Center for Oilseed ProductsOil Crops Research InstituteChinese Academy of Agricultural SciencesWuhan430062China Hubei Hongshan Laboratory Wuhan430070China Xianghu Laboratory Hangzhou311231China

To reveal the characteristic chemicals of walnuts from different origins, we analyzed fatty acid composition,tocopherols, phytosterols and total phenolic content (TPC) of walnuts from three main producing regions inChina. The results showed that walnuts were rich in polyunsaturated fatty acids, and the ratio of ω-6 to ω-3 fattyacids was close to the recommendation of Chinese Nutrition Society. Moreover, walnuts contain high contents oftocopherols (331.20–414.71 mg/kg), phytosterols (97.17–110.35 mg/100 g) and phenols (38.51–48.08 mg GAE/kg). Significant chemical differences exist among walnuts from three production regions. The highest content ofpolyunsaturated fatty acids was found in walnuts from the northern China, the highest content of tocopherols inwalnuts from southwest China, and the highest contents of phytosterol and TPC in walnuts from northwest ***, there was no significant difference in the tocopherol, phytosterol and TPC content of walnuts betweenthe Northern China and Northwest China. The above results provide important references for manufacturers andconsumers to select suitable walnut scientifically and reasonably.

关键词： Walnut Fatty acid Phytosterols Tocopherols Total phenol content producing regions

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