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Related Concept Videos

Electrodeposition01:08

Electrodeposition

1.1K
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
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Phase Transitions: Sublimation and Deposition02:33

Phase Transitions: Sublimation and Deposition

19.4K
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
19.4K
Types of Coprecipitation01:10

Types of Coprecipitation

4.3K
Coprecipitation is the contamination of a precipitate by otherwise soluble species and occurs via different processes. In colloidal precipitates, coprecipitation occurs via surface adsorption. For instance, barium sulfate has a primary layer of adsorbed barium ions and a secondary layer of nitrate counterions. This results in contamination of the precipitate by barium nitrate.
Sometimes, ions in a crystal lattice can undergo isomorphous replacement by inclusions of similar charge and size. For...
4.3K
Washing, Drying, and Ignition of Precipitates00:52

Washing, Drying, and Ignition of Precipitates

4.5K
After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...
4.5K
Colloidal precipitates01:09

Colloidal precipitates

4.1K
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
4.1K
Gravimetry: Inorganic And Organic Precipitating Agents00:49

Gravimetry: Inorganic And Organic Precipitating Agents

5.0K
In gravimetry, the precipitant is chosen carefully to obtain a pure solid that can be easily filtered. Common inorganic precipitants can be used to determine several cations and anions. In some cases, the formation of the same precipitate can be used to determine the cation and the anion. For example, the reaction of barium and chromate ions to give barium chromate is used to determine both barium and chromate. However, precipitates such as hydroxides, oxalates, and metal ammonium phosphates...
5.0K

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Related Experiment Video

Updated: Dec 17, 2025

Formation of Thick Dense Yttrium Iron Garnet Films Using Aerosol Deposition
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Formation of Thick Dense Yttrium Iron Garnet Films Using Aerosol Deposition

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Deposition Mechanisms.

Chantal Darquenne1

  • 1Department of Medicine, University of California, San Diego; La Jolla, California, USA.

Journal of Aerosol Medicine and Pulmonary Drug Delivery
|June 30, 2020
PubMed
Summary
This summary is machine-generated.

Particle deposition in the respiratory tract is key for inhalation therapy success and environmental particle toxicity. Particle size significantly influences where aerosols deposit in the lungs, affecting drug delivery and health risks.

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Area of Science:

  • Pulmonary medicine
  • Aerosol science
  • Toxicology

Background:

  • Inhalation therapy efficacy and particulate matter toxicity depend on aerosol deposition site and extent in the respiratory tract.
  • Understanding particle deposition is crucial for optimizing drug delivery and assessing health risks from inhaled substances.

Purpose of the Study:

  • To elucidate the factors governing aerosol deposition in the respiratory tract.
  • To correlate particle size with deposition location and its implications for inhalation therapy and toxicology.

Main Methods:

  • Review of aerosol deposition mechanisms including inertial impaction, gravitational sedimentation, and Brownian diffusion.
  • Analysis of particle characteristics (size) and respiratory tract structure in relation to deposition patterns.

Main Results:

  • Particle deposition is governed by physical characteristics, lung structure, and airflow.
  • Large particles (>5 μm) deposit in upper airways; small particles (<2 μm) deposit in alveolar regions.
  • Mid-range particles (2-5 μm) deposit in central and small airways.

Conclusions:

  • Particle size is a critical determinant of aerosol deposition patterns in the respiratory tract.
  • Optimizing aerosol delivery for therapy and minimizing toxicity requires consideration of particle size-dependent deposition.