Metal Ion Concentration

Metal ion concentration is the amount of a dissolved metal species present in a defined volume of solution, a fundamental measure in chemistry that influences reactivity, equilibrium, and solution properties. It is determined by the metal-containing compounds that dissolve, dissociate into ions, and participate in processes such as complex formation, precipitation, and redox reactions; pH and competing ligands can alter the freely available ion concentration. Measuring and controlling metal ion concentration supports titrations, water-quality analysis, electrochemistry, catalysis, and biochemical studies. Accurate concentration data also help predict solubility, reaction direction, toxicity, and the performance of industrial and environmental systems.

Metal Ion Concentration - Related Videos

Research

JoVE Journal - Bioengineering

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone

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2017

The protocol for a novel ion concentration polarization (ICP) platform that can stop the propagation of the ICP zone, regardless of the operating conditions is described. This unique ability of the platform lies in the use of merging ion depletion and enrichment, which are two polarities of the ICP phenomenon.

Research

JoVE Journal - Bioengineering
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Fluorescent Nanoparticles for the Measurement of Ion Concentration in Biological Systems

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Cited by 24 •

2011

Fluorescent nanoparticles produced in our lab are used for imaging ion concentrations and ion fluxes in biological systems such as cells during signaling and interstitial fluid during physiological homeostasis.

Research

JoVE Journal - Neuroscience
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Double-barreled and Concentric Microelectrodes for Measurement of Extracellular Ion Signals in Brain Tissue

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Cited by 19 •

2015

We demonstrate the fabrication, calibration and properties of two types of ion-selective microelectrodes (double-barreled and concentric) for measurement of ion concentrations in brain tissue. These are then used in the mouse hippocampal slice preparation to show that excitatory activity changes both extracellular potassium and sodium concentrations.

Measurement of Evoked Potassium Ion Concentration Dynamics in Coronal Hippocampal Slices

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2025

The video demonstrates evoked potassium ion concentration dynamics on electrical stimulation of mouse coronal hippocampal brain slices. A bipolar stimulating electrode is inserted into the stratum radiatum of the CA3 region in the hippocampus, and a potassium-ion selective electrode is placed in the CA1 stratum radiatum. The electrical stimulation causes an action potential, resulting in potassium ion release. Finally, the lack of evoked potassium ion response in the presence of an inhibitory...

Education

JoVE Core - Chemistry

Formation of Complex Ions

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2020

A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...

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