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Extraction and Fatty Acid Composition of Seed Oil from Xanthium sibiricum Patrin Wildly Grown in Xinjiang

ABULIKEMU Abulizi,DILINUER Talipu,ABULIMITI Abudoukadeer,AISHA Nulahong(College of Chemistry and Chemical Engineering,Xinjiang University,rümqi 830046,China)  
Soxhlet extraction was used to extract oil from the seeds of Xanthium sibiricum Patrin wildly grown in Xinjiang.The effects of extraction time,solid/liquid ratio and extraction temperature on oil yield were studied by single factor and orthogonal array design methods.Besides,the fatty acid composition of the extracted oil was measured by GC-MS.The results showed that the optimal values of the above parameters affecting oil yield were determined to be: extraction time 2.5 h,solid/liquid ratio 1:10 and extraction temperature 75 ℃.Under such conditions,the oil yield was 22.14%.Xanthium sibiricum Patrin seed oil contained mainly unsaturated fatty acids,and the relative contents of linoleic acid,oleic acid,palmitic acid,stearic acid were 85.73%,7.67%,3.76% and 1.35%,respectively.
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