萃取

According to content of menthol in sample,conditions for supercritical CO_(2) extraction of essential oil from Mentha haplocalyx Briq.

油超临界CO2萃取的因素进行研究，筛选出薄荷油超临界CO2萃取的最佳条件。

In addition, our works also indicate that MC-ICPMS technique shows a good potential on Re-Os isotopic measurement. 2. A new method for the determination of low Re-Os abundances and ~(187)Os/~(188)Os in a natural rock sample by MC-ICP-MS has been established in our laboratory. Rock samples were digested in inverse aqua regia in sealed Carius tube for 24 hours at 230°C, then Os was separated from the matrix by CCl_4 solvent extraction, and further purification by microdistillation.

建立了Re-Os同位素样品的化学分离和纯化方法以及MC-ICPMS质谱测定方法：岩石样品的Re和Os化学分离方法是采用Carius管溶样法，结合四氯化碳萃取以及氢溴酸反萃取的方法分离出Os，最后是通过微蒸馏的方法纯化Os；利用阴离子交换树脂的方法分离纯化Re。

Method］Raw material was extracted by 50% ethanol,then purified by acetic ethyl.The extract was injected into LC/MS after filtering with micromembrane.

方法］叶下珠药材，以50%乙醇提取，乙酸乙酯萃取，萃取液过微孔滤膜后，采用LC/MS对各成分分离鉴定。

The effect of various solvents and operating parameters through continuous supercritical antisolvent precipitation process on the micronization of peanut skin extracts were investigated in this study.

本研究探讨不同萃取溶剂及连续式超临界反溶剂沉淀法之操作参数对花生膜萃取物微粒化之影响。

Among the open-chain crown ethers and cryptands with a same structure, the compounds disubstituted at the amide nitrogen atoms show the larger extractability for Am and Eu than the monosubstituted ones. The compounds disubstituted at the amide nitrogen atoms by two phenyl groups show the larger extractability for Am and Eu than those by two alkyl groups.

3在结构相同的开链冠醚和开链穴醚中，酰胺氮原子上二取代化合物对Am和Eu的萃取能力大于一取代化合物；酰胺氮原子上两个取代基都是苯基的化合物对Am和Eu的萃取能力大于两个取代基都是烷基的化合物。

The results indicated that ethanolic extract of Andrographis paniculata and Morinda citrifolia at concentrations 1.25 μg/mL were superior to standards of Trolox and rutin 1.25 μg/mL appeared to have a lengthening in lag phase.

结果显示1.25 μg/mL穿心莲乙醇萃取物和海巴戟天叶乙醇萃取物比标准品Trolox 和 rutin 1.25 μg/mL 更能延长迟滞期。

Ultrasonic-aid solvent extraction of moringa seed oil was studied.

用超声波辅助溶剂萃取辣木籽油，以出油率为评价标准，优化萃取过程的最佳工艺条件。

With regard to reducing power of hot water extracts, the mycelia better than Chang-chih rice.

结果显示在热水萃取方面，樟芝菌丝体萃取物之还原力则比樟芝米较好。

In this paper,the authors compared extraction spectrophotometric method with gravimetric method in the determination of naphthenic acid in oil refining sewage,and found that the former method is better than the latter both in precision and operation.

讨论了萃取分光光度法测定炼油污水中环烷酸含量的测定条件和干扰因素并与重量法进行了比较，萃取分光光度法的精确度比重量法高而操作比重量法简单。

In order to recover nonferrous metals in copper-nickel alloy scrap, a corresponding technology was adopted as follows crushing copper-nickel alloy scrap→leaching the sample with sulfuric acid→extracting copper ion with N902→extracting zinc ion with P204→getting nickelous sulfate solution.

摘 要：采用粉碎白铜合金废料→酸浸出→N902萃取分离出铜离子→P204萃取分离出锌离子→水相中剩余硫酸镍溶液工艺回收白铜合金废料中的有色金属。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。