Simultaneous and sensitive analysis of inorganic and organic gaseous compounds by pulsed discharge helium ionization detector (PDHID)

摘要

A simple gas chromatographic method has been developed for the simultaneous and sensitive analysis of inorganic (H_2, CO, and CO_2) and organic gaseous compounds (CH_4, C_2H_4, C_2H_6, C_3H_6, C_3H_8, iso-C_4H_(10), and n-C_4H_(10)). The analysis of these gases generally requires multi-columns and/or multi-detectors, whereas the proposed method uses a single micropacked column and a single pulsed discharge helium ionization detector (PDHID). All of the investigated peaks (except for the N_2 and O_2 peaks, which are the major components of air) show good separation when using an oven temperature program from 40°C to 300°C. This gas chromatography-PDHID system yielded good linearity and a relative standard deviation of less than 5%. This sensitive and convenient method shows great potential in analyses of various types of gaseous compounds.