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二硫化碳常用作溶剂和萃取剂,由于其比重大,对氢火焰离子化鉴定器的信号微弱,对水中苯系物的萃取率较高,所以它又是水和大气中苯系物的浓缩剂,原油中苯系物的稀释剂。分析纯的二硫化碳中含有苯和甲苯等杂质,影响苯系物的定性、定量,所以,需要选择一种既能除净二硫化碳中的苯和甲苯又不破坏二硫化碳的方法。为此,根据苯系物和二硫化碳的物理化学性质,对上海化学试剂四厂生产的分析纯二硫化碳进行了提纯。使二硫化碳溶液由上至下、垂直、缓慢地流过分别填充有硅胶、活性炭、
Carbon disulfide is often used as a solvent and extractant. Due to its large specific gravity, the signal of the flame ionization detector is weak and the extraction rate of benzene series in water is high. Therefore, it is also a concentrate of benzene series in water and air, Benzene series of crude oil diluent. Analytically pure carbon disulfide contains impurities such as benzene and toluene, affecting the qualitative and quantitative determination of benzene series. Therefore, we need to choose a method that can remove benzene and toluene in carbon disulfide without destroying carbon disulfide. To this end, based on the physicochemical properties of the benzene series and carbon disulfide, analytical grade carbon disulfide produced by Shanghai Chemical Reagent No. 4 Factory was purified. The carbon disulfide solution from top to bottom, vertically, slowly flow through the silica gel were filled, activated carbon,