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Redox Titration: Other Oxidizing and Reducing Agents01:26

Redox Titration: Other Oxidizing and Reducing Agents

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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...
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Redox Titration: Overview01:21

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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...
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Electrochemistry is the science involved in the interconversion of electrical and chemical reactions. Such reactions are called reduction-oxidation, or redox reactions. These important reactions are defined by changes in oxidation states for one or more reactant elements and include a subset of reactions involving the transfer of electrons between reactant species. Electrochemistry as a field has evolved to yield sufficient insights on the fundamental principles of redox chemistry and multiple...
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Redox Titration: Iodimetry and Iodometry01:23

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Iodometry and iodimetry are analytical methods used to determine the concentration of oxidizing or reducing agents using iodine. In iodometric titrations, the oxidizing analyte solution is usually acidified and treated with an excess of iodide ions, which generates an equivalent amount of iodine in equilibrium with triiodide. The released iodine is subsequently titrated directly against a standardized reducing agent. As the dilute iodine color becomes pale yellow, a few drops of freshly...
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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...
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Voltammetric Techniques: Cyclic Voltammetry01:10

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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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Simultaneous Measurement of Superoxide/Hydrogen Peroxide and NADH Production by Flavin-containing Mitochondrial Dehydrogenases
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Nitrocellulose redox permanganometry: A simple method for reductive capacity assessment.

Jan Homolak1,2, Ivan Kodvanj1,2, Ana Babic Perhoc1,2

  • 1Department of Pharmacology, University of Zagreb School of Medicine, Zagreb, Croatia.

Methodsx
|January 10, 2022
PubMed
Summary
This summary is machine-generated.

We developed a fast and simple method to measure reductive capacity in biological samples using nitrocellulose redox permanganometry (NRP). This technique is cost-effective and suitable for high-throughput screening and detailed tissue analysis.

Keywords:
AntioxidantNitrocelluloseOxidative stressPotassium permanganateROSReductive capacity

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Area of Science:

  • Biochemistry
  • Analytical Chemistry
  • Biotechnology

Background:

  • Assessing the reductive capacity of biological samples is crucial for understanding various physiological and pathological processes.
  • Existing methods can be time-consuming, costly, or lack the sensitivity required for high-throughput applications.

Purpose of the Study:

  • To introduce a rapid, simple, and robust method for measuring the reductive capacity of biological samples.
  • To demonstrate the utility of this method for both high-throughput screening and detailed spatial analysis within tissues.

Main Methods:

  • Developed nitrocellulose redox permanganometry (NRP) utilizing potassium permanganate reduction and manganese dioxide precipitation on a nitrocellulose membrane.
  • Adapted NRP into HistoNRP, employing passive diffusion slice print blotting for spatial reductive capacity analysis in tissues.

Main Results:

  • NRP provides a cost-effective and rapid assessment of reductive capacity in both liquid and solid biological samples.
  • HistoNRP enables detailed spatial mapping of reductive capacity within tissue structures while preserving anatomical context.
  • The method is compatible with high-throughput screening formats.

Conclusions:

  • Nitrocellulose redox permanganometry (NRP) offers a versatile and efficient approach for evaluating biological reductive capacity.
  • HistoNRP is a valuable modification for visualizing the spatial distribution of reductive capacity in biological tissues.
  • These methods hold promise for advancing research in various biological and medical fields.