英语翻译The technique of liquid-liquid extraction has ,of course

英语翻译
The technique of liquid-liquid extraction has ,of course ,been widely used to separate the components of organic systems;in particular,solvent extraction may be employed to effect a "clean-up"and achieve concentration of the solutes of interest prior to analysis .This is illustrated by the clean-up steps which have been used for the analysis of organochlorine pesticides,at the 0.1vg/g level,in animal fats,and dairy products.In one such procedure the solution of animal fat in hexane (25mL) is extracted with three successive portions(10mL) of dimethylformamide (DMF) saturated with hexane.The combined DMF extracts are washed with hexane (10mL) saturated with DMF to remove any remaining trace of fat;after separation of the hexane it is equiibrated with further DMF(10mL) to reduce loss of pesticide residue.The pesticide compounds are finally partitioned back into clean hexane after adding water to the combinded DMF extracts.The hexane layer is used for the quantitative analysis of the extracted pestifide residues using gas chromatography woth an electron-capture detector.It is of interest to note that the extraction procedure involves two organic phases (i.e.no aqueous phase is involved) and that miscibility is minimized by the saturating each solvent with the other.Extraction procedures for organic species,however,do not in general possess the same degree of selectivity as may be achieved for metal-containing systems,and the chief analytical application of solvent exeraction is for the determination of metals as minor and trace constituents in various inorganic and organic materials.
不要粘贴到在线翻译里面啊,那翻译出来的东西完全读不通的,

液液分离的技术在有机系统里被广泛运用.具体地说,提取溶剂可以起到清洁的效果以及使溶液达到想要的浓度用于分析实验的效果.我们可以用被用来分析有机氯杀虫剂的消毒办法,0.1VG/G,在动物肥和乳制品中提取.（这句不确定）在这种步骤中,己烷里的动物肥溶液可以被三个连续的10ML溶液的饱和的己烷DMF所提取.将混在一起的DMF提取物和饱和的DMF和乙烷一起清洗来除去残留的脂肪.分离己烷后,他和去更多的DMF混合区减少杀虫剂残留的损失（不确定）这些杀虫剂化合物在加水到混合的DMF提取物后最后提取回去干净的己烷.己烷的表面用于提取的用气体色谱法的杀虫剂残留物数量的分析.出于兴趣,提醒一下,这个提取过程有两个有机过程参与（无水过程也参与了）以及它的可混合性被最小化,通过时溶剂互相饱和.然而,有机物的提取过程,并不和分离性的温度相同.因为这样可以达到含有金属的系统?而且主要的溶剂分离分析应用时用于小部分金属盒追踪不同的有机和无机材料的成分.
自己翻译的,其实不明白它的内容.不过看在翻译的那么心口的份上.采取吧.