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Related Concept Videos

Redox Reactions01:24

Redox Reactions

Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
Redox Titration: Overview01:21

Redox Titration: Overview

Redox titration is a chemical analysis technique used to determine the concentration of an unknown substance by measuring the electron transfer in a redox (reduction-oxidation) reaction. The process involves gradually adding a titrant with a known concentration of an oxidizing or reducing agent, to the analyte, the solution with an unknown concentration, until reaching the endpoint, which indicates the completion of the reaction between the two substances. Ensuring the analyte is in a single...
Redox Titration: Other Oxidizing and Reducing Agents01:26

Redox Titration: Other Oxidizing and Reducing Agents

Besides iodine, other oxidizing or reducing agents can serve as titrants in redox titrations. Common oxidizing titrants include KMnO4, cerium(IV), and K2Cr2O7. The choice of oxidizing titrants depends on factors like stability, cost, analyte strength, and reaction rate between the analyte and titrant. KMnO4 is a strong oxidizing titrant that reduces from Mn(VII) to Mn(II) in a highly acidic solution, simultaneously oxidizing the analyte to a higher oxidation state. In this case, KMnO4 acts as a...
Redox Equilibria: Overview01:23

Redox Equilibria: Overview

A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
Voltammetric Techniques: Linear-Scan (E vs Time)01:12

Voltammetric Techniques: Linear-Scan (E vs Time)

Polarography is a classical voltammetric technique used to analyze electrochemical reactions. This method applies a linear potential sweep to a dropping mercury electrode (DME), and the resulting current is measured. A dropping mercury electrode is commonly used as the working electrode in polarography. It consists of a capillary tube filled with mercury, where the tiny droplet forms at the tip. This droplet continuously drops from the capillary, creating a new electrode surface for each...
Voltammetric Techniques: Cyclic Voltammetry01:10

Voltammetric Techniques: Cyclic Voltammetry

Cyclic voltammetry (CV) is an electrochemical technique used to investigate the redox properties of a chemical species. It involves measuring the current response of an electrochemical cell as a function of the applied potential. The setup for cyclic voltammetry typically consists of a working electrode, a reference electrode, and a counter electrode—all immersed in an electrolyte solution. The working electrode is where the redox reaction of interest occurs, while the reference electrode...

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Continuous, short-interval redox data loggers: verification and setup considerations.

C Shoemaker1, R Kröger, B Reese

  • 1Department of Wildlife, Fisheries and Aquaculture, Mississippi State University, USA.

Environmental Science. Processes & Impacts
|July 12, 2013
PubMed
Summary
This summary is machine-generated.

This study introduces a continuous redox data logger for precise, minute-interval measurements, overcoming previous logistical and technological limitations in redox potential monitoring.

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Area of Science:

  • Environmental Science
  • Geochemistry
  • Analytical Chemistry

Background:

  • Traditional redox potential measurements are limited by infrequent sampling intervals (hours to weeks) due to labor and technological constraints.
  • Accurate, high-frequency temporal redox data is crucial for understanding dynamic environmental processes.
  • Existing technology struggles to provide precise redox measurements at fine temporal scales.

Purpose of the Study:

  • To develop and verify a continuous, short-interval redox data logger.
  • To enable accurate measurement of redox potential at minute time intervals (±10 mV).
  • To overcome the limitations of traditional, infrequent redox sampling methods.

Main Methods:

  • A novel continuous data logger for redox potential was designed and constructed.
  • Tiered verification procedures assessed hardware and probe sensitivity to voltage changes.
  • Laboratory testing included calibration with known mV solutions, soil flooding, and drying experiments.

Main Results:

  • The developed redox data logger demonstrated accuracy and precision in measuring redox potential.
  • Verification procedures confirmed the hardware's reliability for stability and change detection.
  • Laboratory tests validated the logger's performance under controlled redox conditions.

Conclusions:

  • The continuous, short-interval redox data logger successfully addresses limitations in traditional measurement techniques.
  • The validated technology provides accurate and precise redox potential data at minute intervals.
  • Future research will focus on field applications for detailed spatial and temporal redox investigations.