在含溴酚蓝的磷酸缓冲溶液中,应用循环伏安法于经预处理的玻碳电极上形成聚合物薄膜.结果表明,在-1. 0V~+1. 8V(vs.Ag/AgCl)扫描电位之间形成的薄膜具有较高的电活性和稳定性.该电极对抗坏血酸电化学氧化有催化作用,既使抗坏血酸的氧化电位负移了 270mV,又增大了其氧化峰电流.催化峰电流与抗坏血酸浓度在 2. 5~250μg/mL范围内呈良好的线性关系.
A film of poly ( bromophenol blue ) was formed on a glassy carbon electrode by using cyclic voltammetry. A stable film could be obtained with a potential range from -1.0V to +1.8V(vs.Ag/AgCl). The experimental results showed that the poly ( bromophenol blue ) modified glassy carbon electrode could catalyse the oxidation of ascorbic acid. It decreased the oxidation potential by about 270mV but increased the peak current. Meanwhile, this electrode showed a good linear current response for the ascorbic acid range from 2.5 to 250 (g/mL.)
[1] DiabAS,HathootAA,AbdelAM,etal.Preparationofanovelconductingpolymerbyelectropolymerizationofthiophenylidine8 naphthylamineSchiff base[J].Euro peanPolymerJournal,2000,36(9):1959.
[2] ChenShen ming,FaYu hsiang.Theelectropolymeriza tionandelectrocatalyticpropertiesofpolymerizednewfuchsinfilmmodifiedelectrodes[J].JournalofElectroa nalyticalChemistry,2003,553:63.
[3] KongYT,BoopathiM,ShimYB.Directelectrochemis tryofhorseradishperoxidasebondedonaconductingpolymermodifiedglassycarbonelectrode[J].BiosensorandBioelectronics,2003,19(3):227.
[4] ChristopherMA,GyorgyI,VilmosK.Poly(methyleneblue)modifiedelectrodesensorforhaemoglobin[J].An alyticaChimicaActa,1999,385(1~3):119.
[5] AdrianaRL,AntonioSS,ArnaldoCP,etal.Electro chemicalbehaviorandelectrocatalyticstudyofthemeth ylenegreencoatedonmodifiedsilicagel[J].JournalofColloidandInterfaceScience,2002,254(1):113.
[6] LuoJi wen(罗济文),LiJia zhou(李家洲),LiJia gui(李家贵),etal.Preoarationofpoly(brilliantcresylblue)modifiedglassycarbonelectrodeanditselectrocat alyticactivity[J].ChemicalResearch(inChinese),2003,14(1):18.
[7] KaryakinAA,IvanovaYN,KaryakinaEE.Equilibrium(NAD+/NADH ) potentialonpoly( neutralred)modifiedelectrode[J].ElectrochemistryCommunica tions,2003,5(8):667.
[8] BeatriuPS,EsteveF.Comparativestudyofelectronme diatorsusedintheelectrochemicaloxidationofNADH[J].BiosensorsandBioelectronics,2004,19(10):1131.