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Related Concept Videos

Sample Preparation for Analysis: Advanced Techniques01:08

Sample Preparation for Analysis: Advanced Techniques

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Sample preparation is an essential step in the analytical process. It involves preparing a sample so that it can be analyzed accurately. The goal is to extract the analyte, the substance you want to measure, from the sample while removing any components that may interfere with the analysis. Sample preparation techniques vary depending on the physical state of the sample.
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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...
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All living things are formed mostly of carbon compounds called organic compounds. The category of organic compounds includes both natural and synthetic compounds that contain carbon. Although a single, precise definition has yet to be identified by the chemistry community, most agree that a defining trait of organic molecules is the presence of carbon as the principal element, bonded to hydrogen and other carbon atoms. However, some carbon-containing compounds such as carbonates, cyanides, and...
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Organic chemistry is the study of compounds of carbon called organic compounds. Organic compounds either originate from living organisms or are synthesized by chemists. A defining trait of these compounds is the presence of carbon as the principal element, which is bonded to other carbon atoms and other elements such as hydrogen, oxygen, nitrogen, and sulfur. The existence of a wide array of organic molecules is a consequence of carbon atoms’ ability to form up to four strong bonds to...
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Covalent Organic Frameworks in Sample Preparation.

Javier González-Sálamo1,2, Gabriel Jiménez-Skrzypek1, Cecilia Ortega-Zamora1

  • 1Departamento de Química, Unidad Departamental de Química Analítica, Facultad de Ciencias, Universidad de La Laguna (ULL), Avda. Astrofísico Fco. Sánchez, s/n°, 38206 San Cristóbal de La Laguna, Spain.

Molecules (Basel, Switzerland)
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Covalent organic frameworks (COFs), porous polymers with high surface area, show promise for analytical sample preparation. This review details their use in various solid-phase extraction techniques.

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covalent organic frameworksextractionmicroextractionsample preparationsorbent

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Area of Science:

  • Analytical Chemistry
  • Materials Science

Background:

  • Covalent organic frameworks (COFs) are emerging porous crystalline polymers.
  • COFs possess high porosity, large surface area, and excellent thermal stability.
  • These properties make them ideal candidates for advanced material applications.

Purpose of the Study:

  • To provide a comprehensive overview of COFs in analytical sample preparation.
  • To review different COF materials utilized for extraction and clean-up.
  • To assess the performance and suitability of COFs in various solid-phase extraction techniques.

Main Methods:

  • Review of literature on COFs applied in sample preparation.
  • Categorization of COFs based on their application in extraction techniques.
  • Analysis of extraction devices and formats employing COFs.
  • Evaluation of COF performance in solid-phase extraction (SPE), including conventional, dispersive, magnetic/solid-phase microextraction (SPME), and stir-bar sorptive extraction (SBSE).

Main Results:

  • COFs have demonstrated significant potential as sorbent materials in various SPE modes.
  • Their tunable structures and high surface areas facilitate efficient analyte extraction.
  • Successful applications reported across different analytical chemistry challenges.
  • COFs offer a promising alternative to traditional sorbent materials.

Conclusions:

  • COFs are highly suitable for analytical sample preparation due to their unique properties.
  • Further research into COF design and application can enhance analytical methodologies.
  • COFs represent a versatile platform for developing next-generation extraction materials.