The　presence　of　inorganic　elements　in　fuel　gas　generally　accelerates　the　corrosion　and　depletion　of　materials　used　in　the　fuel　gas　industry,　and　even　leads　to　serious　accidents.　For　identification　of　existing　trace　inorganic　contaminants　in　fuel　gas　in　a　portable　way,　a　highly　efficient　gas-liquid　sampling　collection　system　based　on　gas　dispersion　concentration　is　introduced　in　this　work.　Using　the　constructed　dual　path　gas-liquid　collection　setup,　inorganic　cations　and　anions　were　simultaneously　collected　from　real　liquefied　petroleum　gas　(LPG)　and　analyzed　by　capillary　electrophoresis　(CE)　with　indirect　UV　absorbance　detection.　The　head-column　field-amplified　sample　stacking　technique　was　applied　to　improve　the　detection　limits　to　2　25　ng　mL(-1).　The　developed　collection　and　analytical　methods　have　successfully　determined　existing　inorganic　contaminants　in　a　real　LPG　sample　in　the　range　of　4.59-138.69　mu　g　m(-3).　The　recoveries　of　cations　and　anions　with　spiked　LPG　samples　were　between　83.98　and　105.63%,　and　the　relative　standard　deviations　(RSDs)　were　less　than　7.19%.