Physicochemical indexes and fatty acid composition of peony seed oil

The peony seed oil was obtained by Soxhlet extraction.After saponification and esterification of the oil,the fatty acid composition was determined by capillary GC-MS,and the relative content was determined by peak area normalization.The physicochemical indexes of peony seed oil were analyzed by state standard method.The results showed that 17 fatty acids were identified,and the major fatty acids were linolenic acid,oleic acid and linoleic acid.The content of unsaturated fatty acids was 83.05%,and that of saturated fatty acids was 14.33%.The physicochemical indexes of peony seed oil were as follows:acid value 1.784 mgKOH/g,iodine value 176.2 gI/100 g,saponification value 194.4 mgKOH/g,relative density 0.930 7.The peony seed was a new oil resource containing rich linolenic acid.