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28120033GuangzhouChemistryVol28No1Mar.20031009-220X(2003)01-0059-0512220054O625.3Atea-polyphenolsTP15%~30%GB12493-90[1],130,80%[2]:-L-EGCG50%~60%–L-ECG15%~20%-L-EGC10%~15%-L-EC4%~6%1L-EC:R1=R2=HL-EGC:R1=OH,R2=HL-ECG:R1=H,R2=RL-EGCG:R1=OH,R2=R1Fig.1Structuresofcatechinandrelativecompounds2002-03-192001086028,pH6,BHABHTTBHQ22.1,,[3],,,,[4],,,,,50%~70%[5],10.25,,[6][7],,,,,[8]30%,10.8%94.6%3.4%86.2%[9]1618%~11%95%70%1%[10]1,,,260,3,16.25%2.2pHH2SO4,[11],,95%0.7%~1.5%,,,Al3+Zn2+Fe3+Mg2+Ba2+Ca2+Al3+Zn2+Ca2+[11]Ca(OH)2Ca2+[12]Zn2+-Al3+96%,10.4%[13]AlCl310%~11%99.5%Al3+[14]Zn2+10.5%[15][16]NaOH2.3[17],,,,,622892-292-3,93%,92%[18],,NK-S381.57mg/g,,100%,,[4],40%AA90%,2.4[19]TC,PCTPCO2,:,;,,2031,,23,4,,,1631,,.A.1989114:2592,..1993,249:493~4993,,..1989:105~1064,..19975:255~2585,..1997,194:31~336,..199912:25~287,,..19974:202~2068,,..2001,361:80~829,,..20003:12~1310..1997171:56~6011,,..CN1043730A.199012,..2001223:32~3413..19965:24~2614..1999,184:70~7215..19993:1016,,..1998,194:76~7917,..1996,181:18~1918,,..1998,145:428~43319,.SCF.19984:10~14TheExtractiveMethodsofTea-PolyphenolsfromTeaLIYong-mei,WANGXue-shong,YUYan-chunDepartmentofChemicalEngineering,HuaihaiInstituteofTechnology,Lianyungang222005,ChinaAbstractTheresearchofextractionmethods,features,andthelatestmodificationtrendoftea-polyphenolsTPhasbeenreviewed.Thispaperfocusesonfourkindsofextractivemethodsoftea-polyphenolsandtheirfeaturesthatis,solventextraction,saltsedimentation,resinseparationandsupercriticalextraction.Recently,moreandmoreattentionshavepaidtocombinethesemethodsintoextractingfinetea-polyphenols.Keywordstea;tea-polyphenols;extraction