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Related Concept Videos

Colloidal precipitates01:09

Colloidal precipitates

5.7K
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...
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Coagulation01:06

Coagulation

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Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
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The Colloidal State01:29

The Colloidal State

184
The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called...
184
Colloids and Suspensions01:17

Colloids and Suspensions

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Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
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Washing, Drying, and Ignition of Precipitates00:52

Washing, Drying, and Ignition of Precipitates

5.8K
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...
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Colloids03:22

Colloids

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Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
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Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides
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Colloidal iron(III) pyrophosphate particles.

Laura Rossi1, Krassimir P Velikov2, Albert P Philipse1

  • 1Van't Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.

Food Chemistry
|January 16, 2014
PubMed
Summary
This summary is machine-generated.

Researchers synthesized stable, white, nanometre-sized colloidal iron(III) pyrophosphate particles. This novel food-grade material offers potential for enhanced iron fortification in food and beverage products.

Keywords:
Colloidal particlesFerric pyrophosphateFortification

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Area of Science:

  • Food Science and Technology
  • Materials Science
  • Colloid Chemistry

Background:

  • Ferric pyrophosphate is utilized in mineral fortification.
  • Synthesis and properties of colloidal ferric pyrophosphate are not well understood.
  • Potential applications in food fortification exist but require further research.

Purpose of the Study:

  • To synthesize and characterize colloidal iron(III) pyrophosphate particles.
  • To develop a convenient and food-grade synthetic method.
  • To investigate the physical properties of these colloidal particles for food applications.

Main Methods:

  • Synthesis of colloidal iron(III) pyrophosphate.
  • Characterization using techniques to assess crystallinity, surface charge, density, refractive index, internal structure, elemental composition, and magnetic properties.

Main Results:

  • A convenient, food-grade synthetic method was developed.
  • Stable, nanometre-sized colloidal particles with a unique white color were produced.
  • Comprehensive physical property characterization was performed.

Conclusions:

  • The study successfully synthesized and characterized novel colloidal iron(III) pyrophosphate.
  • These findings provide essential data for utilizing this material in food fortification.
  • The research supports the development of more effective iron-fortified food and beverage products.