几类市售坚果产品油脂含量及其对膳食油脂摄入的影响分析

Oil contents of several kinds of commercial nuts and their contribution on daily oil intake

以市售的主要几类坚果为研究对象,采用索氏提取法测定了产品油脂含量,并重点分析了产品的类型及加工方法对坚果类休闲食品的油脂含量及其对膳食油脂摄入的影响,旨在为消费者购买和消费坚果类食品提供参考和建议。结果表明,未经任何处理的核桃仁油脂含量最高,达70%以上,花生仁、葵花籽仁、扁桃仁次之,腰果、开心果、南瓜子、西瓜子籽仁油脂含量相对较低。配料及不同加工方法的应用也会对坚果产品的油脂含量影响较大。推荐我国居民每人每天的坚果摄入量依次为花生仁30 g、带壳花生40 g、核桃24 g、葵花籽56 g、西瓜子70 g、南瓜子40 g、扁桃仁(巴旦木)24 g、开心果65 g和腰果36 g,这可以满足营养学会推荐的居民日不饱和脂肪酸建议摄入量的20%。

Using several main kinds of commercial nuts and seeds products as raw materials, Soxhlet extraction method was used to determine the oil contents, and effects of raw varieties of nuts and processing techniques on oil contents, and contribution of consumption of nuts products on oil intake were analysed, as well. On basis of the analysis, references and advice on nuts consumption was proposed. The result shows that the walnut contains the highest oil, followed by peanuts, sunflower seeds and almond, while cashew, pistachio, cushaw and watermelon seeds have relative lower contents of oil. Auxiliary materials used and processing methods significantly affected the oil contents in products. We recommend that optimum daily consumption of nuts products are as follows, peanut seeds 30 g, peanuts with shelf 40 g, walnut 24 g, sunflower seeds 56 g, watermelon seeds 70 g, cushaw seeds 40 g, almond 24 g, pistachio nuts 65 g or cashew 36 g, which will supply 20% of total necessary unsaturated fattyacid intake.