南开大学学报（自然科学版）ActaScientiarumNaturaliumUniversitatisNankaiensisVol.56№1Feb.2023第56卷第1期2023年2月ArticleID:0465-7942-(2023)01-0102-10MagneticSolidPhaseExtractionofL-phenylalaninebyAmino-functionalizedγ-Fe2O3QinMingshan1,ZhuXinyi1,WeiDongwei1,SongQiqi1,JinTianming2,LiCun1,YangLinyan1(1.TianjinKeyLaboratoryofAgriculturalAnimalBreedingandHealthyHusbandry,CollegeofAnimalScienceandVeterinaryMedicine,TianjinAgriculturalUniversity,Tianjin300392,China;2.TianjinAcademyofAgriculturalSciences,Tianjin,300192,China)Abstract:Fouraminogenizednanoparticleswerepreparedasfollows:γ-Fe2O3@SiO2-cysteamine,γ-Fe2O3@SiO2-APTMS,γ-Fe2O3@SiO2-PEI,γ-Fe2O3@SiO2-G1.0.Magneticsolidphaseextractionexperi-mentsofL-phenylalaninehavebeencarriedoutataconcentrationof2.5×10-6mol/L,differentextractiontimesandpHgradients.Thelowerfluorescenceintensityofsupernatantindicatedthebetterextracteffects.Asforγ-Fe2O3@SiO2-G1.0nanoparticles,thebestadsorptionwasobtainedatpH=5,whiletheadsorptiontimewas8h.Asforγ-Fe2O3@SiO2-PEInanoparticles,lessadsorptionthanabovecouldbeobtainedatpH=3and0.5h.γ-Fe2O3@SiO2-PEInanoparticlestooklesstimetoextractL-phenylalanine.Functional-izedγ-Fe2O3nanoparticlesarepromisingforsolid-phaseextractionofL-phenylalanine.Keyword:Fe;surfacechemistry;IR;TEM;XPS;absorptionCLCnumber:O658.2Documentcode:A0IntroductionIntheresearchandapplicationsofnewnanoparticles,magneticnanoparticlesarewidelyusedbe-causeoftheiroptical,electrical,magnetic,thermalandcatalyticproperties.Magneticnanoparticlesareakindofnanoparticleswhichcanbemanipulatedbymagneticfields.Thiskindofparticleusual-lycontainstwocomponents.Thecoreisamagneticmaterial,usuallyiron,nickel,andcobalt.Thesurfaceisothermaterialswithfunctionalitiestoimprovestability,includingcarbonmaterials,ionicliquids,Metal-OrganicFrameworks,andotherpolymericmaterials.Whilenanoparticleswerelessthan1μmindiameter(typically5-500nm)andlargerbeadswere0.5-500μm.IndiameterAgroupofmagneticnanoparticleswithadiameterof50-200nmcomposedofmanyindividualma...
