简介：Thecomparisonofsolidphaseextraction(SPE)forthepreconcentrationandisolationofpolyphenolsintobaccosampleswascarriedoutbyultra-highperformanceliquidchromatography/tandemmassspectrometry(UPLC/MS/MS)andmultivariateanalysis.SeveraladsorbingmaterialsofSPE(C18,NH2,SAXandOASIS)wereinvestigated.ItwasfoundthattheC18andOASIScartridgescannotonlyspeedupthepurificationprocess,butalsosimplifytheSPEoperation.AUPLC/MS/MSwasusedforthedeterminationofpolyphenolsintobaccosamplesafterpurification.Allanalyteswereseparatedanddeterminedin2min.Thelimitofdetectionwas0.05ng/mL.Clusteranalysis(CA)andprincipalcomponentanalysis(PCA)wereusedfortheanalysisof4varieties(flue-curedtobacco,orientaltobacco,sun-curedtobaccoandburley)inordertointerprettheeffectofplantingandmachiningprocessontheconcentrationofpolyphenols.ThedifferenttypesoftobaccosamplescouldbeeasilyclusteredbyCA.PCAonthechemicalcompositionoftobaccoresultedintwoprincipalcomponents(PCs)thattake84.2%ofthetotalvariance.ThePCAandCAindicatethatthepolyphenolscanbeusedfordistinguishingtobaccotypes.