Two-step extraction with polar solvents and nonpolar solvents was an effective comprehensive extraction for antioxidant and essential oil of rosemary Rosmarinus officinalis l.
极性溶剂和非极性溶剂的两步提取法是迷迭香抗氧化剂和精油综合提取的有效方法，操作简单，容易实施。
By means of two-step cross current extraction method, the extraction rate of TP can be more than 90%.
采用两级错流提取即可使茶多酚提取率达到90%以上。
To research removal effect of free fatty acid in separation process, two-step separation method was adopted in supercritical CO2 extraction of sea buckthorn oil.
在沙棘油超临界CO_2萃取试验中采用两级分离的方法研究了脱酸效果。
The pretreatment process includes two steps, the first step is hot metal desulphurization, and the second is the vanadium extraction.
这种预处理工艺分两步，第一步是铁水脱硫，第二步为脱硫铁水提钒。
Abstract : The two-step method to get carnosic acid from rosemary leaves was employed. The first step was getting rosemary extracts from rosemary leaves by ultrasoundassisted ethanol extraction;
摘要 ： 以迷迭香叶子为原料，采用两步法分离纯化鼠尾草酸，第一步：迷迭香叶经超声辅助乙醇提取，得到迷迭香提取物；
Abstract : The two-step method to get carnosic acid from rosemary leaves was employed. The first step was getting rosemary extracts from rosemary leaves by ultrasoundassisted ethanol extraction;
摘要 ： 以迷迭香叶子为原料，采用两步法分离纯化鼠尾草酸，第一步：迷迭香叶经超声辅助乙醇提取，得到迷迭香提取物；
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