Development and applications of time-resolving electrochemical detector by means of the fast-scan differential pulse voltammetry using a microelectrode

微电极快扫描差分脉冲伏安法时间分辨电化学检测器的研制及应用

• 批准号: 03640493
• 负责人: OKAZAKI Satoshi
• 金额: $ 1.28万
• 依托单位: Ehime University (1992)Kyoto University (1991)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03640493/
• 关键词: differential pulse voltammetry; rapid-response electrochemical measurement; cyclic voltammetry; microelectrode; fast potential scan method; time-resolving electrochemical detector; redox potential; ferrocene; 酸化還元電位; 内部シ-ルド型マイクロ電極; 時間分解微分パルスボルタモ

A novel short-pulse first-scan cyclic differential pulse voltammetry (FSDPV) using a microelectrode have been developed.The relationships between the electrode sizes and the pulse conditions have been examined in detail. It became clear that the available minimum pulse duration (tau_d)_<min> and rest time (tau_r)_<min> are related to the electrode size used ; i.e. (tau_d)_<min>=(tau_r)_<min>=20 and 50mus for 25- and 50-mum-radius Pt microelectrode, respectively.The FSCDPV of ferrocene in acetonitrile was measured at a potential scan-rate of 10 V/s and the pulse conditions of E_a (pulse height)=10 mV and tau_d=tau_r=20mus. The observed voltammogram is in good agreement with the simulated one based on reversible one electron transfer process.It became clear that the redox potential of ferrocene could be measured accurately with a relative standard deviation of 2% or better.In conclusion, the FSCDPV method appears to be an attractive tool not only for the accurate measurements of redox potentials in electrochemistry but rather for analytical applications, particularly, for time-resolving voltammetric detection in the flowing solutions.

提出了一种新的微电极短脉冲首次扫描循环微分脉冲伏安法（FSDPV），详细研究了电极尺寸与脉冲条件的关系。很明显，可用的最小脉冲持续时间（τ_d）_<min>和静止时间（τ_r）_<min>与所用的电极尺寸有关，即对于<min><min>25 μ m和50 μ m半径的Pt微电极，（τ_d）_ =（τ_r）_ =20和50 μ s。实验结果表明，FSCDPV方法不仅可以准确地测定二茂铁的氧化还原电位，而且可以用于分析应用，特别是电化学分析中的氧化还原电位的测定，其相对标准偏差小于2%。用于流动溶液中的时间分辨伏安检测。

项目成果

S.Okazaki: "Studies of substituent effects on the redoxーpotentials of 9ーsubstituted anthracene derivatives by means of a firstーscan cyclic votammetry." J.Electroanal.Chem.(1992)

S.Okazaki：“通过首次扫描循环伏安法研究取代基对 9-取代蒽衍生物氧化还原电位的影响。”J.Electroanal.Chem.(1992)

S. Okazaki: "Development of short-pule fast-scan cyclic differential pulse voltammetry using a microelectrode" Denki Kagaku. 61. (1993)

S. Okazaki：“使用微电极开发短脉冲快速扫描循环微分脉冲伏安法”Denki Kagaku。

S. Okazaki: "Development of short‐pulse fast‐scan cyclic differential pulse voltammetry using a microelectrode" 電気化学および工業物理化学. 61. (1993)

S. Okazaki：“使用微电极开发短脉冲快速扫描循环微分脉冲伏安法”电化学和工业物理化学 61。（1993）

M.Oyama: "Measurement of time resolved sbsorption spectra of species generated by fast electrochemical processes." Anal.Chim.Acta. 245. 199-202 (1991)

M.Oyama：“测量快速电化学过程产生的物质的时间分辨吸收光谱。”

S.Okazaki: "Time resolved differential pulse voltammetric detecter for flow analysis." Anal.Chem.(1992)

S.Okazaki：“用于流量分析的时间分辨差分脉冲伏安检测器。”