A　new　ECL　detection　system　equipped　with　an　electrically　heating　controlled　microelectrode　as　the　working　electrode　was　established　in　this　paper.　The　electrically　heated　microelectrode　was　made　of　a　platinum　wire　(25　mu　m　in　diameter,　6　mm　in　long).　Linear　scan　voltammetry　has　been　applied　to　investigate　the　ECL　behavior　of　luminol　on　the　heated　microelectrode　during　cathotic　scanning.　Good　sensitivity　and　reproducibility　for　measurement　of　the　ECL　of　luminol　could　be　obtained　at　the　heated　microelectrode.　(c)　2007　Published　by　Elsevier　Ltd.