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气相色谱仪气路系统内任何部位压力值的测量与指示都有一定意义,特别是色谱柱前的压力值。这是因为:(1)要根据柱前压选择合适的稳流阀输入压力;(2)重复启动仪器时,依据柱前压可判断流速、柱阻力有无变化,或柱后是否漏气;(3)程序升温过程中,观察柱前压随柱温度升高而变化的情况,可以判断稳流阀的输入压力是否太低;(4)柱前压在分析
Gas chromatograph Any part of the gas system pressure measurement and instructions have some significance, especially in front of the column pressure value. This is because: (1) according to the pre-column pressure to select the appropriate steady flow valve input pressure; (2) repeatedly start the instrument, according to the pre-column pressure can determine the flow rate, column resistance or no change, (3) During the temperature rising process, the change of the column pre-column pressure with the increase of the column temperature can be observed to determine whether the input pressure of the steady flow valve is too low; (4)