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1、第4期程寒等：单壁碳纳米管修饰电极的抗污染性能研究及其用于五羟色胺检测54514MusamehM，WangJ，MerkociA，LinY．Electrchem．Comm．，2OO2，4(10)：743—74615WangJ，P．DeoR，MusamehM．Electroanalysis，2Oo3，15(23_24)：1830一l83416SwamyBE，VentonBJ．Analyst，2007，132(9)：876—88417HuangWH，PangDW，TongH，WangZL，ChengJK．Ana1．Chem．，2001，73(5)：1

2、048-105218TsangSC，ChenYK，HarrisPJF，GrennMLH．Nature，1994，372(6502)：159-16219ChengH，HuangWH，ChenRS，WangZL，ChengJK．Electrophoresis，2007，28(10)：1579—158620ZOULing—Li，LIQiu—Sha，HANGuo—Zhu，El3Li．ChineseI，．Ana1．Chem．，2011，39(1)：45—50邹玲莉，李秋莎，韩国柱，吕莉．分析化学，2011，39(1)：45—50StudyonAntifo

3、ulingPerformanceofSingle·walledCarbonNanotubesModifiedElectrodeandItsApplicationinDeterminationof5-HydroxytryptamineCHENGHan，LANJia-Feng，WEIGuang．Han，HUANGWei．Hua，CHENGJie．Ke(CollegeofPharmacy，South—CentralUnive~ityforNationalities，Wuhan430074，China)(CollegeofChemistryandMol

4、ecularScience，WuhanUniversity，Wuhan430072，China)AbstractAcarbonfibermicroelectrode(CFME)modifiedwithsingle—walledcarbonnanotubes(SWNTs)wasprepared，thesurfacemorphologyandelectrochemicalbehaviorofmodifiedelectrodewascharacterizedbytransmissionelectronmicroscope(TEM)，cyclicvol

5、tammetry(CV)，differentialpulsevohammetry(DPV)andchron0amperometry．Theexperiment~resultsshowedthattheSWNTscouldsignificantlyalleviateelectrodefoulingcausedby5-hydroxytryptamine(5-HT)．In0．2mol／LTris—HC1(pH7．4)buffer，theamperomatricmethodwasusedforthedeterminationofthreeconsecu

6、tiveinjectionsof1．0xl0mol／L5-HT，thepeakcurrentdecreasedsignificantlysuccessivelyataCFME．andthethirdpeakcurrentwas43．4％ofthefirstone．ThepeakcurrentdecreaseslightlyataSWNTs—CFMEandthethirdpeakcurrentwas97．3％ofthefirstone，thepeakcurentchangewassignificantlylesswiththerisingofte

7、sttimes，theresultsindicatedthattheSWNTs-CFMEpossessedstableelectrochemicalperformance．Thedetectionlimitof5-HTimprovedfrom1．2x10mol／Lto6．8×10mol／LafterSWNTscoating．Themodifiedelectrode．basedmicrochipcapillaryelectrophoresissystemwassuccessfullyappliedtodetect5一HTinratbloodpla

8、smaandtheconcentrationof5一HTwas(6．96±0．24)xl0-7mol／L(n=5)，therecoveryofstan