With　systematic　studies　of　pre-column　thermal　hydrolysis,　a　method　is　described　for　the　determination　of　five　phenoxyl-type　N-methylcarbamates　(NMCs)　(viz.,　propoxur,　carbofuran,　3-hydroxy-carbofuran,　carbaryl,　and　bendiocarb)　in　vegetables　by　capillary　zone　electrophoresis　with　amperometric　detection.　Effects　of　hydrolysis　parameters　such　as　alkali　medium,　temperature,　and　hydrolysis　time,　as　well　as　separation　conditions,　are　investigated.　Under　the　optimum　conditions,　baseline　separation　of　five　hydrolysates　is　achieved　within　16　min.　Good　calibration　curves　of　propoxur,　carbofuran,　3-hydroxy-carbofuran,　carbaryl,　and　bendiocarb　are　obtained　from　1.20　×　10-7　to　5.00　×　10-5　mol/L,　and　their　detection　limits　(S/N　=　3)　are　1.80　×　10-8,　1.50　×　10-8,　1.80　×　10　-8,　2.50　×　10-8,　and　1.80　×　10-8　mol/L,　respectively,　which　is　approximately　20∼50-fold　more　sensitive　than　those　previously　reported　with　a　UV　method.　In　the　application　of　vegetable　samples,　the　five　NMCs　are　well　determined.　Average　recoveries　of　75∼89%　and　86∼100%　at　fortified　levels　of　0.05　and　0.80　mg/kg　are　achieved　with　relative　standard　deviations　of　2∼6%,　respectively.　The　method　is　sensitive,　reproducible,　and　provides　an　alternative　means　for　the　analysis　of　phenoxyl-type　NMC　pesticide　residues.