我厂从美国引进的931A工业色谱仪,用于芳烃厂制苯装置中间产品苯中杂质(包括C_6～C_8直链烷烃和环烷烃)的在线分析。仪器采用了三根不同类型的填充柱,经常失效,使用周期不足六个月便要换柱子。由于充填的担体和固定液型号通用性差,国内配置困难,只好依赖进口,但价格昂贵且货源又不保证,致使停机。 Our factory imported the 931A industrial chromatograph from the United States for the on-line analysis of benzene impurities (including C_6-C_8 linear paraffins and naphthenes) in the benzene plant intermediate product of the aromatics plant. The instrument uses three different types of packed columns, often fail, the use of less than six months will have to change the column. As filling the carrier and fixed liquid model versatility poor, domestic allocation difficulties, had to rely on imports, but the price is high and the supply is not guaranteed, resulting in downtime.