Page 20 - 理化检验-化学分册 2021年第六期

陶 菡, 等: 部分电化学还原氧化石墨烯修饰玻碳电极用于苦参碱的测定

[ １９ ] 王博, 李秀杰, 张雪冰 ． 苦参碱气相色谱与高效液相色 谱的分析方法[ J ] ． 农药, ２０１８ , ５７ ( ７ ): ４９７Ｇ４９９．

DeterminationofMatrineb yGlass yCarbonElectrode
ModifiedwithPartiall yElectrochemical
ReducedGra p heneOxide

TAOHan , HUANGRui , LIUFen g TIANYunxia , WUYuan g en
,
( Ke yLaborator yo fFermentationEn g ineerin gandBio p harmac yo fGuizhouProvince , Colle g e
o fLi q uorandFoodEn g ineerin g , GuizhouUniversit y , Gui y an g５５００２５ , China )

Abstract : Ag lass ycarbonelectrode ( GCE ) modifiedwithp artiall yelectrochemicalreducedg ra p heneoxide
( p ErGO ) wasusedastheworkin g electrode ( p ErGO / GCE ) fortheelectrochemicaldeterminationofmatrine ( MT ) ．
Gra p heneoxide ( GO ) wasdro pp edontheactivatedGCE , andthenthep ErGO / GCEwasobtainedb y reducin gGO
－１
top ErGOat－０．７５ Vfor２００s．Usin g０．１ mol L NaH ２PO ４ ＧNa ２HPO ４ buffersolution ( p H ７．０ ) asthe
electrol y te , p latinum wireasthecounterelectrodeand A g / A g Clelectrodeasthereferenceelectrode , MTinthe
sam p lewasenrichedato p encircuitp otentialfor１２０sandthendeterminedb ydifferentialp ulsevoltammetr y
( DPV ) ．TheresultsshowedthattheconcentrationofMT waslinearl yrelatedtoitsoxidationp eakcurrentinthe
－６ －４ －１ －１
ran g eof８．０×１０ －１．０×１０ mol L , withdetectionlimit ( ３S / N ) of４．０ μ mol L ．RSDs ( n＝５ ) ofthe
determinedvalueswas１．８％ b yre p eateddeterminationof MTstandardsolutionfor５times withthe modified
electrode．Testforrecover ywasmadeontheactualsam p lesb y standardadditionmethod , g ivin gvaluesofrecover y
intheran g eof９４．８％ －１０４％．This method wasusedfortheanal y sisoftheactualsam p le , andtherelative
deviationbetweenthedeterminedvalueandthelabeledvalueofMT was－５．９％．
Ke y words : artiall yelectrochemicalreducedg ra p heneoxide ; electrochemicalmethod ; matrine
p

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