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Direct electrochemistry of hemoglobin and myoglobin at didodecyldimethylammonium bromide-modified powder microelectrode and application for electrochemical detection of nitric oxide
Guo, Zhimou1,2; Chen, Jian1,2; Liu, Huan2; Cha, Chuansin2
关键词Hemoglobin Myoglobin Direct Electrochemistry Powder Microelectrode Nitric Oxide
刊名ANALYTICA CHIMICA ACTA
2008-01-21
DOI10.1016/j.aca.2007.11.038
607期:1页:30-36
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Analytical
研究领域[WOS]Chemistry
关键词[WOS]BY-LAYER FILMS ; DIRECT ELECTRON-TRANSFER ; SHELL NANOCLUSTER FILMS ; HEME-PROTEINS ; CLAY NANOPARTICLES ; SURFACTANT FILMS ; ASCORBIC-ACID ; ELECTROCATALYSIS ; BIOSENSOR ; DNA
英文摘要Hemoglobin (Hb) and myoglobin (Mb) were immobilized at the didodecyldimethylammonium bromide (DDAB)-modified powder microelectrode (PME) to fabricate Hb-DDAB-PME and Mb-DDAB-PME. Direct electrochemistry of Hb and Mb were achieved on the DDAB-modified PME. The formal potential was -0.224V for Hb and -0.212V for Mb (vs. SCE). The apparent surface concentration of Hb and Mb at the electrode surface was 2.83 x 10(-8) and 9.94 x 10(-8) Mol cm(-2). The Hb-DDAB-PME and Mb-DDAB-PME were successfully applied for measurement of NO in vitro. The anodic current peaks for NO oxidation at +0.7 V and the cathodic current peaks for NO reduction at -0.85V on the CV curves were obtained on the modified electrodes. For detection of NO at +0.7 V, the sensitivity is 3.31 mA mu M-1 cm(-2) for Hb-DDAB-PME and 0.6 mA mu M-1 cm(-2) for Mb-DDAB-PME. The detection limit is 5 nM for Hb-DDAB-PME and 9 nM for Mb-DDAB-PME. The linear response range is 9-100 and 28-330 nM for Hb- and Mb-modified PME, respectively. For the electrochemical detection of NO at -0.85 V by using Hb-DDAB-PME, the detection sensitivity is 39.56 mu A mu M-1 cm(-2); the detection limit is as low as 0.2 mu M; and the linear response range is 1.90-28.08 mu M. (c) 2007 Elsevier B.V. All rights reserved.
语种英语
WOS记录号WOS:000252834200003
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/141083
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Wuhan Univ, Coll Chem & Mol Sci, Lab Electrochem, Wuhan 430072, Peoples R China
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GB/T 7714
Guo, Zhimou,Chen, Jian,Liu, Huan,et al. Direct electrochemistry of hemoglobin and myoglobin at didodecyldimethylammonium bromide-modified powder microelectrode and application for electrochemical detection of nitric oxide[J]. ANALYTICA CHIMICA ACTA,2008,607(1):30-36.
APA Guo, Zhimou,Chen, Jian,Liu, Huan,&Cha, Chuansin.(2008).Direct electrochemistry of hemoglobin and myoglobin at didodecyldimethylammonium bromide-modified powder microelectrode and application for electrochemical detection of nitric oxide.ANALYTICA CHIMICA ACTA,607(1),30-36.
MLA Guo, Zhimou,et al."Direct electrochemistry of hemoglobin and myoglobin at didodecyldimethylammonium bromide-modified powder microelectrode and application for electrochemical detection of nitric oxide".ANALYTICA CHIMICA ACTA 607.1(2008):30-36.
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