气相色谱法测定环氧乙烷中的微量杂质

采用GDX-104或Porapak P为固定相,TCD为检测器,氢气为载气,在桥流200mA,柱温90～95℃下,分析环氧乙烷中微量杂质.用峰高或峰面积内标法定量,最大相对误差为0.19%.本法的特点是在同一根色谱柱中使水分、二氧化碳、乙烯等8种组分得到完全分离和测定,适用于氯醇法和乙烯法生产的环氧乙烷的测定.

THE DETERMINATION OF TRACE IMPURITIES IN ETHYLENE OXIDE BY GAS CHROMATOGRAPHY

The trace impurities in ethylene oxide were determinated using GDX-104 or Porapak P as gas chro-matographic stationary phase,TCD as a detector and hydrogen a carrier gas,at the bridge current 200mA and column temperature 90-95℃.The quantitation was performed by peak height or peak area internal standard method,the maximum relative error 0. 19%. This method is speciality that a good separation and determina-tion of 8 components such as H2O,CO2,CH2 = CH2 etc. can be obtained in some chromatographic column. The method can be used the determination of ethylene oxide produced by chloralchol or ethylene.