摘要
A method was designed for detecting trace helium,neon and hydrogen by means of gas chromatography.The detection of trace helium,neon and hydrogen was realized through back-blowing principle to protect the molecular sieve column.The analytical method established has the advantages of large measurement range,high sensitivity,short analysis time,long service life,and easy operation,thus having a good application prospect.This method was used to detect the non-hydrocarbon gases in the near-surface soil gases over Huangqiao helium reservoir,and the result proves its effectiveness.