萃取

Unroasted black sesame seeds were pressed and defatted with n-hexane, extracted with 80 % methanol, and separated by XAD-2 gel open column chromatography eluting with a serious of concentrations of aqueous methanol solutions (20 %, 40 % and 60 %). The 60 % methanol eluate, which contained higher content of ST compound, were collected and freeze-dried to obtain the ST extract powder.In animal experiment, we used vitamin E deficient rat model to increase oxidative stress.

试验材料为未经炒焙之泰国黑芝麻，将脱油后之芝麻粕先以80 %甲醇溶液进行萃取，经浓缩后再以XAD-2胶体进行管柱层析，以不同浓度之甲醇水溶液冲提后，收集ST含量较高之60 %甲醇水溶液区分层，行冷冻乾燥可得ST萃出物粉末。

Essential oils were extracted from Michelia alba Dc.

用固相微萃取法萃取白兰Michelia alba Dc。

Prior to electrophoresis, the analytes were purified and preconcentrated by solid phase extraction from plasma.

血清样品通过固相萃取预处理和浓缩，对映体的固相萃取回收率在82.9%～90.7%，相对标准偏差RSD%均小于7 %。

The compounds extracted by water and n-butanol are glycosides, maltose and sugarlike compounds.

氯仿萃取结果表明微波法萃取得到的药液含有较少的树脂类化合物。

The authors carried many researches of the feasibility about enriching and separating trace zinc from almost cadmium, and the rate of recoveries of several common metal ions according to this methodo Through repeatedly probed and tried out, at last, a thought as collaborated with traditional methods was established - using diantipyrinylmethane as complex reagent ,with ammonium thiocyanate and zinc forming the triple ionic compound in the medium of hydrochloric acid , extracted by trichloromethane, extracted the organic system by ammonium hydroxide in order to gain zinc .

本文主要研究了从镉基体中富集分离微量锌的可行性，以及采用该方法几种常见金属离子的回收率。通过反复的摸索、试验，最终确立了与传统方法相结合的思路—采用二安替比林甲烷作为络合剂和硫氰酸铵、锌在盐酸介质中形成三元离子缔合物，用三氯甲烷作为萃取剂，最后用氨水作为反萃剂将有机相中的锌洗脱出来与镉分离。

Acylvanadium sulfate is prepared by mixing coal mine containing vanadium, fluorite mine and sulphuric acid, then pumped in the reactive tank, further chemical combination and dissolving, acylvanadium sulfate enters in solution, qualified vanadic oxide is prepared.

本方法是将含钒石煤矿、萤石矿和硫酸调浆后，泵入反应槽中，进行化合和溶解，生成硫酸酰钒而进入溶液，经液固分离后得到含钒浸出液，浸出液经采用铁屑还原、氨水中和、萃取、反萃、氨水沉钒、煅烧等成熟工艺处理后，便产出合格五氧化二钒。

Essential oils from the dried rhizomes of zingiber officinale were extracted by supercritical-CO2 fluid(SFE-CO2 ),the flavonoids of essential oils were further extracted by solvent.

利用超临界CO2流体从干姜中萃取出姜精油，经过有机溶剂对其萃取使生姜黄酮进一步分离，采用大孔树脂为层析柱填充料对生姜黄酮进行纯化，得到纯度为72.3%生姜黄酮。

We choose the solid phase extration to deal with the biolog...

本文采用固相萃取法对叶酸血浆样品进行前处理，首次应用大孔吸附树脂作为萃取固定相，同时，还研究了叶酸的光化学行为，发现叶酸本身有弱荧光，在一定的反应介质中，经光化学诱导，可产生较强的荧光产物，从而明显改善检测灵敏度。

Using hydrotreated gas oil as solvent, under the conditions of a reaction temperature of 400 C, a hydrogen partial pressure of 10 MPa and a reaction time of 1 h, a portion of coke deposits could be removed yet without the function of hydrogenating coke.

采用溶剂萃取法除去工业失活催化剂上沉积的焦炭和金属的研究结果表明，用四氢呋喃、吡啶和喹啉这3种含杂原子的有机强溶剂常温萃取催化剂，其去除焦炭能力很弱，而且会因这些溶剂的强吸附作用污染催化剂；盐酸洗涤能有效去除催化剂表面的钙、铁沉积层，但不能去除焦炭；低芳香性的加氢瓦斯油在400 C、H2压力为10MPa、反应1h的条件下可部分去除催化剂上的焦炭，但不具备强的氢化焦炭作用；1，2，3，4-四氢化萘因具有供给原子氢的能力，可以有效地氢化和去除催化剂上的焦炭。

Study and application on solvent impregnated resins technique in separation of nonferrous metals

介绍了萃淋树脂萃取钪的研究和应用情况。

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。