Methods the extracted liquid with petroleum ether from the geochemical samples in the north of Shaanxi was spectrally analyzed by using the optimized measurement condition.
方法用优化后的条件对陕北地区化探样品中芳烃的石油醚萃取液进行了光谱分析。
The precipitate was vacuum dehydrated, and then phospholipids were extracted with ethyl ether. having 74. 90% of the phospholipids; its productivity is 30. 87%.
菜油脚经离心分离出中性油，再通过真空脱水，乙醚提取制得某油磷脂，其磷脂含量达74．90％，产率为30．87％。
Fat in male and female squillid meat and squillid heads was extracted with diethyl ether by means of rapid fat extractor instead of Soxhlet extractor respectively.
用快速脂肪提取器对雄、雌虾蛄肉及虾蛄头中的脂肪进行了提取和测定。
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