孝感学院学报
孝感學院學報
효감학원학보
JOURNAL OF XIAOGAN UNIVERSITY
2006年
6期
5~8
,共null页
多壁碳纳米管 化学修饰电极 吲哚-3-丁酸 电化学测定
多壁碳納米管 化學脩飾電極 吲哚-3-丁痠 電化學測定
다벽탄납미관 화학수식전겁 신타-3-정산 전화학측정
multi-wall carbon nanotubes; indole-3-butyric acid; chemically modified electrode; electrochemical determination
基于多壁碳纳米管膜修饰玻碳电极建立了一种直接测定吲哚-3-丁酸的电分析方法。考察了吲哚-3-丁酸在多壁碳纳米管膜电极上的伏安行为，发现它在0．73V（vs．SCE）处有一个灵敏的氧化峰。与裸玻碳电极相比，多壁碳纳米管膜电极显著提高了吲噪-3-丁酸的氧化峰电流。在优化后的实验条件下，氧化蜂电流与吲哚-3-丁酸的浓度在9．0×10^-7～5．0×10^-5mol／L之间有很好的线性关系，开路富集3min后，其检出限为5．0×10^-8mol／L。在用于测定模拟样品中吲噪-3-丁酸的含量时，检测限低、分析速度快、重现性好。
基于多壁碳納米管膜脩飾玻碳電極建立瞭一種直接測定吲哚-3-丁痠的電分析方法。攷察瞭吲哚-3-丁痠在多壁碳納米管膜電極上的伏安行為，髮現它在0．73V（vs．SCE）處有一箇靈敏的氧化峰。與裸玻碳電極相比，多壁碳納米管膜電極顯著提高瞭吲譟-3-丁痠的氧化峰電流。在優化後的實驗條件下，氧化蜂電流與吲哚-3-丁痠的濃度在9．0×10^-7～5．0×10^-5mol／L之間有很好的線性關繫，開路富集3min後，其檢齣限為5．0×10^-8mol／L。在用于測定模擬樣品中吲譟-3-丁痠的含量時，檢測限低、分析速度快、重現性好。
기우다벽탄납미관막수식파탄전겁건립료일충직접측정신타-3-정산적전분석방법。고찰료신타-3-정산재다벽탄납미관막전겁상적복안행위，발현타재0．73V（vs．SCE）처유일개령민적양화봉。여라파탄전겁상비，다벽탄납미관막전겁현저제고료신조-3-정산적양화봉전류。재우화후적실험조건하，양화봉전류여신타-3-정산적농도재9．0×10^-7～5．0×10^-5mol／L지간유흔호적선성관계，개로부집3min후，기검출한위5．0×10^-8mol／L。재용우측정모의양품중신조-3-정산적함량시，검측한저、분석속도쾌、중현성호。
A multi-walled carbon nanotubes film coated glassy carbon electrode had been developed for the direct determination of indole-3-butyric acid （IBA）. At the MWNT-modified GCE, IBA yielded a well-defined oxidation peak at 0. 73V（vs. SCE） in pH2. 0 phosphate buffer solution. Compared with the bare GCE, the MWNT-modified significantly increased the oxidation peak current of IBA. The electrochemical behavior of IBA at the MWNT-modified GCE were examined, the experimental parameters for the determination of IBA were optimized. Under optimum conditions, the oxidation peak current increased linearly with the concentration of IBA over the range from 9. 0× 10^-7～5. 0× 10^-5 mol/L with a detection limit of 5. 0 × 10^-8 mol/L after 3 min of open-circuit accumulation. The MWNT film coated GCE has been used to detect IBA sample solution.
