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对进口的美国931A工业色谱仪进行了改造。用一根长25m大口径(0.53mm)毛细管柱取代原来的两根填充柱,提高了分离效率,延长了柱寿命。用于苯中杂质(C_6～C_8直链烷烃和环烷烃)的在线分析,取得了满意效果。
The United States imported 931A industrial chromatograph was modified. Replacing the two original packed columns with a 25 m long (0.53 mm) capillary column increases separation efficiency and extends column lifetime. For the on-line analysis of benzene impurities (C_6 ~ C_8 linear paraffins and naphthenes), and achieved satisfactory results.