紫苏籽油理化性质测定及脂肪酸组分分析

Determination of Physicochemical Properties and Analysis on Fatty Acid Composition of Different Perilla Seed Oil

研究测定了9个不同品种紫苏籽油的感官指标和理化性质，并对其脂肪酸组成进行了分析。结果表明，9个不同品种紫苏籽油皂化值199．5～214．9mg／g，品种间差异不显著，而其他理化指标品种间存在显著差异，紫苏籽油相对密度0．887—0．942，烟点202～250气、水分及挥发物含量0．046％～0．072％，酸值0．405-1．416mg／g，碘值156．9～197．6g/100g，过氧化值1．052～2．460mmol／kg。紫苏籽油中总不饱和脂肪酸占92．83％-93．96％，其中亚麻酸57．67％～69．35％。ZB—1色泽稳定、烟点低、水分及挥发物含量少，抗氧化性强，适于食用油开发；ZB-2亚麻酸含量高、抗氧化性强，是高亚麻酸品种选育的良好材料。

Sensory indicators and physicochemical properties of perilla seed oil from 9 different varieties were studied in the paper with their fatty acid compositions being determined further. The results showed that saponification number of 9 varieties changed from 199. 530 to 214. 908 mg/g while no significant differences had been extended. However,there were significant variations in other physicochemical properties among varieties; the relative density ranged from 0. 887 to 0. 942, smoking point from 202 to 250 ~C, the content of moisture and volatile matter from 0.046% to 0.072% ,acid value from o. 405 to 1. 416, iodine value from 160. 330 to 198. 575 ,peroxide value from 1. 052 to 2. 718. For perilla seed oil,total unsaturated fatty acid was of a range from 92.83% to 93.96% with linole- nic acid from 57.67% to 69.35%. ZB -1 was the most suitable as edible oil due to its stable color, lower smoke point,little moisture and volatile matter and strong antioxidant;while ZB -2 with high linolenic acid content and strong antioxidant was good material for breeding linolenic acid -rich variety.