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用吹气法在线测量脉冲萃取柱参数。结果表明 :两相界面测量的偏差在± 4mm以内 ,脉冲频率测量的相对偏差在 2 %以内 ,存留分数测量的相对偏差在± 5%以内。由信号曲线得到的参数S与脉冲腿中的表观脉冲振幅之间存在较好的线性关系 ,脉冲柱内真实振幅与表观振幅和频率比值之间也存在相关性较好的线性关系。可通过吹气法测量脉冲萃取柱中的真实振幅
On - line measurement of pulse extraction column parameters by insufflation method. The results show that the deviation of the two-phase interface measurement is within ± 4mm, the relative deviation of the pulse frequency measurement is within 2%, and the relative deviation of the measurement of the retention fraction is within ± 5%. There is a good linear relationship between the parameter S obtained from the signal curve and the apparent pulse amplitude in the pulse leg. There is also a good linear relationship between the true amplitude of the pulse column and the apparent amplitude and frequency ratio. The true amplitude in a pulsed extraction column can be measured by the air-blowing method