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Related Concept Videos

Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...
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Ion-Exchange Chromatography

Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
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Potentiometry: Types of Electrodes

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Controlled-Potential Coulometry: Electrolytic Methods

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Capillary Electrophoresis: Instrumentation01:20

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Capillary electrophoresis instrumentation typically consists of several key components. A high-voltage power supply generates the electric field necessary for the separation by connecting to an anode (the positively charged electrode) and a cathode (the negatively charged electrode) located in buffer reservoirs at each end of the capillary tube. The system includes a sample vial, a fused silica capillary tube coated with polyimide for mechanical strength through which the sample components...

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Related Experiment Video

Updated: May 28, 2026

Making, Testing, and Using Potassium Ion Selective Microelectrodes in Tissue Slices of Adult Brain
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Published on: May 7, 2018

Aerosol Jet Printed Ion-Selective Electrodes for Potassium Detection.

Giorgia Polidori1, Emilio Sardini1, Mauro Serpelloni1

  • 1Department of Information Engineering, University of Brescia, Via Branze 38, 25123 Brescia, Italy.

Sensors (Basel, Switzerland)
|May 27, 2026
PubMed
Summary

Aerosol Jet Printing (AJP) created potassium ion-selective electrodes (K-ISEs) show promising near-Nernstian behavior and reduced sodium interference. Further optimization is needed to improve reproducibility compared to commercial electrodes.

Keywords:
MWCNT transducerPVC ion-selective membraneaerosol jet printingion-selective electrodespotassium detectionprinted electronicssingle-interferent response testssolid-contact sensors

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Multi-analyte Biochip (MAB) Based on All-solid-state Ion-selective Electrodes (ASSISE) for Physiological Research

Published on: April 18, 2013

Area of Science:

  • Electrochemistry
  • Materials Science
  • Sensor Technology

Background:

  • Potassium ion-selective electrodes (K-ISEs) are crucial for monitoring potassium levels in various matrices.
  • Existing commercial K-ISEs have limitations in interference response and fabrication control.
  • Aerosol Jet Printing (AJP) offers a novel approach for fabricating electrochemical sensors.

Purpose of the Study:

  • To evaluate the performance of K-ISEs fabricated using AJP.
  • To compare the AJP-K-ISEs with a commercial K-ISE (KION) under controlled interference conditions.
  • To assess the potential of AJP for developing advanced ion-selective electrodes.

Main Methods:

  • Fabrication of K-ISEs using Aerosol Jet Printing (AJP).
  • Performance evaluation including sensitivity, selectivity, and response time.
  • Morphological analysis using Optical Microscopy (OM) and Scanning Electron Microscopy (SEM).
  • Comparative analysis against a commercial KION electrode under controlled interference (Na+, NH4+, urea).

Main Results:

  • Both AJP and commercial K-ISEs demonstrated near-Nernstian behavior (approx. 57 mV/decade).
  • AJP-K-ISEs showed significantly reduced sensitivity to sodium interference compared to commercial electrodes.
  • AJP enabled smoother films and better interface control, but exhibited lower reproducibility (30.12% vs. 18.45%).

Conclusions:

  • AJP is a viable technique for fabricating K-ISEs with improved selectivity against sodium.
  • Further refinement of AJP printing and membrane deposition is necessary to enhance sensor reproducibility.
  • AJP-fabricated K-ISEs show potential for applications in agricultural and environmental monitoring.