Solid Contact Micropipette Ion Selective Electrode II: Potassium Electrode for SECM and In Vivo Applications

Gyetvai, Gergely; Nagy, Lı́via; Ivaska, Ari; Hernádi, István; Nagy, Géza

doi:10.1002/elan.200904617

Cited by 17 publications

(9 citation statements)

References 27 publications

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“…The resulting membrane exhibited reduced electrical resistance compared to the ungrafted polyacrylate membrane, stable potentiometric responses, and lowered detection limits. Nagy and co-workers demonstrated the utility of a solid-contact potassium-selective electrode based on poly(3,4-ethylenedioxythiophene) electrochemically deposited on a micropipette (32). The potassium micropipette electrode was used for scanning electrochemical microscopy (SECM) imaging and in vivo potassium measurements in both plant and animal tissues.…”

Section: Potentiometric Sensorsmentioning

confidence: 99%

Electrochemical Sensors

2010

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Section: Potentiometric Sensorsmentioning

confidence: 99%

Electrochemical Sensors

2010

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“…Recent applications of solid-state ISEs to environmental systems include the measurement of cadmium in saline solutions [6], and lead in rivers [7] and soil [8]. Health applications have included the measurement of potassium in blood [5] and tissue [9], glucose in blood [10], and detection of proteins [11].…”

Section: Introductionmentioning

confidence: 99%

Bayesian Methods for Ion Selective Electrodes

et al. 2012

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With the increasing use of ion-selective electrodes in environmental and health applications, it is important to know the precision of estimated concentrations. A Bayesian model for non-linear calibration is introduced which provides estimates of measurement precision by incorporating uncertainty in calibration parameters and inherent random noise in emf response. The analysis of lead in 17 soil samples demonstrates that large gains in precision are possible when calibrations are extended to include multiple electrodes and standard addition data. The results highlight the need for improved calibration and routine use of standard addition as ion selective electrodes become increasingly popular for demanding, real world applications.

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“…Second, it must be relatively high in order to keep scan time as low as possible so the system does not change significantly during the scan. The most often used scan rates are 10 µm/s 3–6 and 50 µm/s (with a 0.5 s equilibration time) 7 being the highest we could find in the literature of potentiometric SECM.…”

mentioning

confidence: 96%

Deconvolution in Potentiometric SECM

Nagy

2015

Electroanalysis

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One of the main limitations of potentiometric scanning electrochemical microscopy (SECM) is the large RC time constant, and therefore long response time of the cell. A relatively long equilibration interval has to be allowed before sampling at each data acquisition point to reach equilibrium potential, and avoid image distortion. In this paper, we present a method to get high‐quality, low distortion images, without increasing scan time. The convolution function causing the distortion can be expressed from the response function of the potentiometric cell. A model system was studied with high scan rate, then the image was deconvoluted using the inverse of the potentiometric response function to calculate the equilibrium potential for each data acquisition point from the respective observed values.

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Solid Contact Micropipette Ion Selective Electrode II: Potassium Electrode for SECM and In Vivo Applications

Cited by 17 publications

References 27 publications

Electrochemical Sensors

Electrochemical Sensors

Bayesian Methods for Ion Selective Electrodes

Deconvolution in Potentiometric SECM

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