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Related Concept Videos

Sample Preparation for Analysis: Advanced Techniques01:08

Sample Preparation for Analysis: Advanced Techniques

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Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
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Sample Preparation for Analysis: Overview01:21

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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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Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
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A solvent is a substance, most often a liquid, that can dissolve other substances. Here, the substance being dissolved is called a solute. When a solvent and a solute combine, they form a solution - a homogenous mixture of both the solvent and the solute. Water is a universal biological solvent. Its polar structure allows it to dissolve many other polar compounds. The ability of water to dissolve is governed by a balance between water molecules binding to each other and binding to the solute.
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High-Performance Liquid Chromatography: Elution Process01:05

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In High-Performance Liquid Chromatography (HPLC), the elution process is critical to the separation of analytes and the quality of chromatographic results. Elution describes how compounds move through the column and separate based on their interactions with the mobile and stationary phases. This process determines the resolution, peak shape, and retention times in the chromatogram, which are essential for identifying and quantifying components in complex mixtures. Understanding the elution...
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Ionic liquids: solvents and sorbents in sample preparation.

Kevin D Clark1, Miranda N Emaus1, Marcelino Varona1

  • 1Department of Chemistry, Iowa State University, Ames, IA, USA.

Journal of Separation Science
|September 20, 2017
PubMed
Summary

Ionic liquids (ILs) and their derived sorbents offer enhanced selectivity and speed for sample preparation. This review highlights their use in liquid and solid-phase extraction, mass spectrometry, and bioanalysis.

Keywords:
alternative solventsionic liquidsmagnetic ionic liquidsmicroextractionsample preparation

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Area of Science:

  • Analytical Chemistry
  • Materials Science

Background:

  • Ionic liquids (ILs) are tunable solvents with expanding applications.
  • IL-derived sorbents offer improved selectivity over conventional materials.
  • Magnetic ionic liquids (MILs) are emerging for bioanalytical sample preparation.

Purpose of the Study:

  • To review the applications of ILs and IL-based sorbents in sample preparation.
  • To emphasize liquid-phase extraction techniques using ILs and MILs.
  • To cover ILs in mass spectrometry and biological applications.

Main Methods:

  • Review of literature on ILs and IL-derived sorbents.
  • Focus on liquid-phase extraction (LPE) and solid-phase extraction (SPE) using ILs.
  • Discussion of ILs in mass spectrometry (MS) and bioanalytical applications.

Main Results:

  • ILs provide high selectivity for specific analytes.
  • IL-based methods are faster, more selective, and greener than traditional solvents.
  • MILs offer unique advantages for bioanalytical sample preparation.

Conclusions:

  • ILs and IL-derived sorbents are versatile tools for advanced sample preparation.
  • The tunable nature of ILs allows for tailored applications in analytical chemistry.
  • Continued development of ILs promises further innovation in bioanalysis and beyond.