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苯、甲苯、二甲苯是重要的化工原料和溶剂,容易对周围环境造成污染,对接触者造成危害,因而测定环境中的苯、甲苯,二甲苯有很重要的卫生学意义。目前主要测定方法是用二硫化碳做溶剂,邻苯二甲酸二壬酯及有机皂土做固定液,用气相色谱法进行分析。该方法固定液的涂布较繁琐,二硫化碳是一种毒物,用它做溶剂给操作者带来不便。为此我们对测定方法做了修改,用无水乙醇做溶剂,3％OV-17做固定液,可以同时测出苯、甲苯、二甲苯。
Benzene, toluene and xylene are important chemical raw materials and solvents. They are easy to pollute the surrounding environment and endanger the contactors. Therefore, it is very important hygienic significance to determine benzene, toluene and xylene in the environment. At present, the main determination method is to use carbon disulfide as a solvent, dinonyl phthalate and organic bentonite as fixative, and analyzed by gas chromatography. The method of fixing liquid coating more complicated, carbon disulfide is a poison, use it as a solvent to the operator inconvenience. To this end we made the determination of the method has been modified, with ethanol as a solvent, 3% OV-17 as fixative, you can simultaneously detect benzene, toluene, xylene.