过程材料6-外文原文.doc

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1、外文文献ournalofchromatographyA2005(1100)Preparationandevaluationofamolecularlyimprintedsol-gelmaterialforon-linesolid-phaseextractioncoupledwithhighperformanceliquidchromatographyforthedeterminationoftracepentachlorophenolinwatersamplesDe-ManHanGuo-ZlienFangXiu-PingYan

2、Abstract：Ahighlyselectiveimprintedamino-functionalizedsilicagelsorbentwaspreparedbycombiningasurfacemolecularimprintingtechniquewithasol-gelprocessforon-linesolid-phaseextraction-HPLCdeterminationoftracepentachlorophenol(PCP)inwatersamples.ThePCP-imprintedamino-func

3、tionalizedsilicasorbentwascharacterizedbyFT-IR,SEM,nitrogenadsorptionandthestaticadsorptionexperiments.TheimprintedfunctionalizedsilicagelsorbentexhibitedhighselectivityandofferedafastkineticsfortheadsorptionanddesorptionofPCP・Thepreparedsorbentwasshowntobepromising

4、foron-linesolid-phaseextractionforHPLCdeterminationoftracelevelsofPCPinenvironmentalsamples.Withasampleloadingflowrateof5mlmin-1for2min,anenhancementfactorof670andadetectionlimit(S/N=3)of6ng11wereachievedatasamplethroughputoffivesampleshTheprecision(RSD)forninerepli

5、cateon-linesorbentextractionsof10

6、igI1PCPwas3.8%.Thesorbentalsoofferedgoodlinearity(r=0.9997)foron-linesolid-phaseextractionoftracelevelsofPCP.ThemethodwasappliedtothedeterminationofPCPinlocallakewater,riverwaterandwastewatersamples.Keywords:Pentachlorophenol;Solid-

7、phaseextraction;Molecularimprinting;Highperformanceliquidchromatography1.IntroductionPentachlorophenol(PCP)isusedasageneralherbicideinagricultureandasaninsecticidefortermitecontrolinthepreservationofwood[1~3]・Becauseofitstoxicityandunpleasantorganolepticproperties(c

8、oncentrationsaslowasafewgg/1ofphenolaffectthetasteandodourofwaterandfish),PCPhasbeenincludedinthelistofprioritypollutantsbytheUSEnvironmentalProtectionAgency(EPA)[4].Consequently,thedevelopmentofnewsorbentsforselectiveremovalandseparationofpentachlorophenolinenviron

9、mentalmatricesisofparticularsignificance・Molecularimprintingisanattractivemethodforthepreparationofselectivesorbents[5,6].Recently,molecul