萃取

An aliquot of the alcohol solution was taken and further extracted with petroleum ether.

分取部分此乙醇溶液用石油醚萃取，使叶绿素溶入石油醚中。

Three species of typical fresh algae, Chlamydomonas reinhardtii, Euglena gracilis, Synechococcus leopoliensis, were chosed as the experiment material in order to investigate their biodegradable abilities to triazophos.

使用液液萃取——气相色谱检测的方法测定培养基中三唑磷的浓度，回收率在84.2%～97.4%之间，相对标准偏差为0.24%～2.48%；藻培养液离心后取上清液用液相色谱检测培养基中三唑磷的浓度，回收率为99.0%～99.7%，相对标准偏差为0.6%～1.0%。

To Extract the vital green tea essence and hamamelis, aloe extracted liquid, NMF moisturizer factor.

萃取充满活力的绿茶精华及金缕梅，芦荟萃取液，NMF保湿因子。

Ingredient: Helichrysum, aloe extracted liquid and mineral spring active extracted essence etc.

主要成份：蜡菊、芦荟萃取液、矿泉活性萃取精华、海洋糖原。

The whole art of effleurage is to allow the flowers to die slowly in a sleep as it were.

油萃法的窍门在於让花慢慢凋萎，花儿像在沈睡中被萃取香味。

Through the processes of grinding bastnaesite ore concentrate, mixing the ore powder with NaCO3 in the ratio of 1 to 0.1-0.4, roasting the mixture at 400-800 deg.c for 1-6 hr, elution of the roasted sand with hot water to obtain NaF, drying filtered drag after eluting NaF and mixing the dried drag with ammonium chloride, roasting the mixture at 300-600 deg.c for 1-3 hr, hot water soaking to obtain rare earth chloride solution, extraction with 20% kerosine solution of naphthenic acid, and hydrochloric acid counter extraction to obtain rare earth chloride product.

本发明涉及一种氯化铵法从氟碳铈精矿提取氯化稀土的方法，首先将氟碳铈原精矿磨细，并与NaCO 3 混合，其比例为原矿∶NaCO 3 ＝1∶0.1～0.4，混合均匀后在400℃～800℃焙烧1～6小时，焙砂用热水洗出NaF，洗出NaF的滤渣干燥后与氯化铵混合，于300℃～600℃焙烧1～3小时，再用热水浸取得到氯化稀土溶液，用20％的环烷酸煤油液萃取，再采用盐酸反萃得到氯化稀土产品。

The average recoveries of three kinds of extraction method are all suitable for determining pyrethroid pesticide multiresidues in dringking water.

3种萃取方法的回收率均可满足饮用水中痕量拟除虫菊酯类农药的分析，以正己烷快速混合萃取回收率最高。

The experimental results show that at pH 6,the recovery of phenols is 76.6%and of aromatic amines is 64.7%.

实验结果表明，在pH值为6时萃取水样，氯仿-乙醚对苯酚、苯胺的萃取回收率分别为76.6%及64.7%。

Methods:Liquid-liquid extraction was used to enrich and purify the samples.By studying the experimental conditions such as the extraction solvent,the derivative temperature and the derivative time,etc.

采用液液萃取法进行样品的富集和净化，通过对萃取溶剂、衍生温度、衍生时间等试验条件的筛选研究，确立了2，4-二氨基甲苯的气相色谱分析方法。

In the recovery process of electroplating sludge, it researched on acid leaching process, N902—sulfonated kerosene extraction of copper, and copper sulfate stripping and the recovery.

对电镀污泥中铜的回收工艺进行研究，研究了酸浸过程、N902—磺化煤油萃取铜、硫酸反萃以及铜的回收。

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。