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Related Concept Videos

Extraction: Advanced Methods00:56

Extraction: Advanced Methods

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Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
446
Preparation of Samples for Electron Microscopy01:20

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To be visualized by an electron microscope, either transmission or scanning, biological samples need to be fixed (stabilized) so the electron beam does not destroy them and dried thoroughly (desiccated/dehydrated) so the vacuum does not affect them. Fixation needs to be done as quickly as possible because the sample properties will start changing as soon as it is removed from its natural environment. For example, in a tissue sample, the oxygen levels begin decreasing, causing an altered...
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Supercritical Fluid Chromatography01:18

Supercritical Fluid Chromatography

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Supercritical fluid chromatography (SFC) provides a beneficial substitute for gas chromatography (GC) and liquid chromatography (LC) for certain samples because it merges the top attributes of both techniques. SFC allows the separation and analysis of compounds that GC or LC does not easily manage. These compounds are traditionally nonvolatile or thermally unstable, making GC unsuitable and lacking functional groups required for HPLC analysis.
SFC utilizes a supercritical fluid mobile phase,...
233
Size-Exclusion Chromatography01:08

Size-Exclusion Chromatography

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In size-exclusion chromatography (SEC), also known as molecular-exclusion or gel-permeation chromatography, molecules are separated based on their sizes. This technique is important for separating large molecules such as polymers and biomolecules. The two classes of micron-sized stationary phases encountered in SEC are silica particles and cross-linked polymer resin beads. Both materials are porous, but their pore sizes vary significantly.
Silica particles offer advantages such as rigidity,...
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Sample Preparation for Analysis: Overview01:21

Sample Preparation for Analysis: Overview

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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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Precipitation and Co-precipitation01:17

Precipitation and Co-precipitation

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Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
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Updated: Jun 22, 2025

Fabrication of a Dipole-assisted Solid Phase Extraction Microchip for Trace Metal Analysis in Water Samples
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Supramolecular Materials as Solid-Phase Microextraction Coatings in Environmental Analysis.

Nicolò Riboni1, Erika Ribezzi1, Federica Bianchi1

  • 1Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area Delle Scienze 17/A, 43124 Parma, Italy.

Molecules (Basel, Switzerland)
|June 27, 2024
PubMed
Summary
This summary is machine-generated.

Supramolecular materials like metal-organic frameworks (MOFs) and covalent organic frameworks (COFs) offer advanced coatings for solid-phase microextraction (SPME). These materials enhance analyte extraction efficiency and selectivity for environmental monitoring.

Keywords:
covalent organic frameworkscyclodestrinsenvironmental monitoringmetal organic frameworkssolid-phase microextractionsupramolecular receptors

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Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Environmental Science

Background:

  • Solid-phase microextraction (SPME) is a key technique for environmental analyte analysis.
  • SPME coating material performance dictates extraction efficiency, selectivity, and throughput.
  • Traditional SPME coatings face limitations in analyte interaction and specificity.

Purpose of the Study:

  • To review recent advancements (last 5 years) in supramolecular materials for SPME coatings.
  • To highlight the application of metal-organic frameworks (MOFs), covalent organic frameworks (COFs), and supramolecular macrocycles in environmental analysis.
  • To discuss the advantages of these novel materials in enhancing SPME performance.

Main Methods:

  • Review of scientific literature focusing on SPME coatings.
  • Analysis of supramolecular materials including MOFs, COFs, and macrocycles.
  • Evaluation of material properties relevant to extraction, clean-up, and preconcentration of environmental analytes.

Main Results:

  • Supramolecular materials provide unique selectivity and robust frameworks for SPME coatings.
  • These materials enable enhanced interaction between analytes and the coating through tailored functional groups.
  • MOFs, COFs, and macrocycles demonstrate significant potential for improving SPME performance in environmental applications.

Conclusions:

  • Supramolecular materials represent a significant innovation in SPME coating technology.
  • Their tunable structures and properties offer superior performance for environmental analyte extraction.
  • Continued research into these materials promises to advance environmental monitoring capabilities.