Study of the steady-state current at tubular electrodes in the micromolar concentration region

Blaedel, W. J.; Iverson, Dylan

doi:10.1021/ac50019a026

Cited by 49 publications

(30 citation statements)

References 9 publications

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“…1) [1][2][3]. The increased mass transport in hydrodynamic systems such as this means that larger and more accurate current responses can be obtained, and fabrication of the tubular hydrodynamic electrode is relatively facile; thus it has seen significant use experimentally [4][5][6][7][8][9][10][11][12][13][14][15], and such use is likely to increase given the ease with which the electrode geometry lends itself to miniaturisation. The well-defined flow pattern and cylindrical symmetry also make the tubular electrode an ideal candidate for theoretical investigation via numerical simulation [3,16,17].…”

Section: Introductionmentioning

confidence: 99%

Linear sweep voltammetry at the tubular electrode: Theory of EC mechanisms

Streeter

Thompson

Compton

2006

Journal of Electroanalytical Chemistry

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Section: Introductionmentioning

confidence: 99%

Linear sweep voltammetry at the tubular electrode: Theory of EC mechanisms

Streeter

Thompson

Compton

2006

Journal of Electroanalytical Chemistry

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“…This value is almost twenty times greater than that employed in the best pulsed¯ow methodologies [38] and approaching two hundred times larger than the frequency of interrupted¯ow techniques [36,37].…”

Section: Hydrodynamically Modulated Microjet Electrode (Mje)mentioning

confidence: 78%

Recent Advances in Hydrodynamic Modulation Voltammetry

Macpherson

2000

Electroanalysis

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This review considers recent developments in hydrodynamic modulation voltammetry (HMV), and places them into context with earlier work. The concept of hydrodynamically modulating the mass transport rate of species to the surface of an electrode in order to extend detection limits and increase the potential window of a given solvent, is well‐established. Much of the early work in this area, has focused on modulating the rotation speed of a rotating disk electrode or pulsing the solution flow rate through a tubular or channel electrode. Although both methodologies are well‐proven as HMV techniques, the response times and detection limits of these systems have been bound by fairly low modulation frequencies and slow diffusional and hydrodynamic relaxation times. Recent developments, have looked to remove these constraints, by either employing thin layer geometries and/or ultramicroelectrodes (UMEs) in novel hydrodynamic environments. Of particular interest, are the hydrodynamically modulated radial flow microring electrode (RFMRE) and the microjet electrode (MJE), both characterized by extremely high mass transport rates, under steady flow conditions. This results in fast diffusional relaxation times, of the order of tens of microseconds, when mass transfer is modulated, enabling the employment of high modulation frequencies for analysis and reduced detection times.

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“…Much work has been reported using the tubular hydrodynamic electrode, where the increased mass transport means that accurate, enhanced current responses may be obtained, and can be accurately described by the Levich equation [6,7]. Previous work on flow in tubes is varied, including analyses under Lévêque [7] conditions [8][9][10][11][12][13][14][15][16][17], the effect of various homogeneous mechanisms [18][19][20][21][22], voltammetry experiments and ESR responses or other sensing of species in tubular cells [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%