【摘要】 根据 30万t乙烯工程“橡胶”装置中生产工艺控制的实际需要 ,研究了在线分析己烷中痕量四氢呋喃的气相色谱柱系统。使用自制的 7μm特厚膜甲基硅氧烷大孔径弹性石英毛细管柱 ,通过试验不同条件下色谱柱的分离特性及研究组分在柱内的运动轨迹 ,给出了总的柱切换时间程序。在上述基础上 ,完成了正己烷、环己烷中 10 -6(体积分数 )级的四氢呋喃分析。现场应用一年多的实践表明 ,所研制的柱系统从分析时间、运行稳定性、定量准确性 (相对标准偏差小于 5 % )等方面均满足工艺控制的要求。更多还原

【Abstract】 A gas chromatographic system using home made 7 μm thick cross linked dimethylpolysiloxane columns for the on line analysis of trace tetrahydrofuran in hexane in a rubber production facility was developed. The experimental parameters of the column system, including the temperature, flow rate as well as the back flushing and heart cutting program were investigated. The total column switching program was suggested. The system has been successfully operated for more than one year with good resolution, stability and precision (RSD<5%) in analyzing trace tetrahydrofuran (0 250×10 -6 , V/V ) for industrial process control in the rubber production facility.更多还原