The multi-group gas distribution system was used to dilute the permanent gas components in the high-purity gas,and the standard gases of different concentrations obtained were detected by pulsed helium ionized gas chromatograph(GC-PDD).The experimental results show that PDD has high sensitivity and good linearity,which can realize the detection of ultra-low-concentration samples,and further verifies that the actual minimum detection limit of PDHID can reach the level of ng/g(10-9).
关键词
多组分配气系统/脉冲放电氦离子化检测器/检测限/灵敏度
Key words
multi-group gas distribution system/pulsed discharge helium ionization detector/detection limit/sensitivity