A　simple　sample　enrichment　technique,　electrokinetic　migration　enrichment　in　single　phase　using　a　designed　device,　coupled　with　ion　chromatography　is　presented　for　the　determination　of　four　anions　(H2PO4-,　Cl-,　NO3-,　and　SO42-)　in　liquefied　petroleum　gas　by　liquid　adsorption.　The　electrokinetic　migration　enrichment　is　based　on　the　phenomenon　of　ion　electrokinetic　migration　to　the　opposite　electrode.　When　the　anions　migrated　to　the　anode　in　a　smaller　volume　chamber　under　the　electric　field,　the　concentration　was　realized.　The　main　parameters　affecting　enrichment　efficiency　of　applied　voltage　and　enrichment　time　were　investigated.　The　ion　chromatography　condition　for　anions　separation　was　also　studied.　Under　the　optimal　electrokinetic　migration　enrichment　and　ion　chromatography　conditions,　the　four　anions　were　detected　simultaneously　with　good　linear　relationship　(r2　=　0.99080.9968)　and　high　precisions　(less　than　5%　of　the　relative　standard　deviations　of　peak　areas).　The　limits　of　detection　of　anions　(S/N　of　3)　were　in　the　range　of　8600　mu　g　L-1.　The　enrichment　factors　of　the　four　anions　ranged　from　3.1　to　5.8.　The　established　method　was　successfully　applied　to　the　analysis　of　the　trace　anions　in　liquefied　petroleum　gas　by　liquid　adsorption　with　satisfactory　results.　The　advantages　of　this　method　are　simple　operation　and　low　cost.