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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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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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Sampling materials are classified into three main types: solid, liquid, and gas.
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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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Miniaturized Sample Preparation for Transmission Electron Microscopy
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Miniaturized sample preparation methods for saliva analysis.

Shahram Seidi1, Maryam Rezazadeh2, Reza Alizadeh3

  • 1Department of Analytical Chemistry, Faculty of Chemistry, KN Toosi University of Technology, Tehran 16315-1355, Iran.

Bioanalysis
|December 13, 2018
PubMed
Summary

Saliva analysis is gaining traction due to miniaturized methods. This review explores microextraction techniques for saliva bioanalysis, highlighting their potential to overcome previous volume limitations.

Keywords:
liquid phase microextractionmembrane based microextractionmicroextractionsalivasample preparationsolid phase microextraction

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Area of Science:

  • Analytical Chemistry
  • Biochemistry
  • Biomarker Discovery

Background:

  • Saliva is a crucial biofluid for analysis, mirroring blood composition.
  • Limited sample volumes have historically hindered extensive saliva research.
  • Miniaturized sample preparation techniques are driving renewed interest in saliva analysis.

Purpose of the Study:

  • To comprehensively review microextraction methods applicable to saliva analysis.
  • To elucidate the operational principles of various microextraction techniques.
  • To identify and discuss emerging microextraction methods for future saliva bioanalysis research.

Main Methods:

  • Literature review of existing saliva analysis techniques.
  • Exploration of microextraction principles (e.g., solid-phase microextraction, liquid-phase microextraction).
  • Comparative analysis of method applicability and limitations for saliva matrices.

Main Results:

  • Overview of current microextraction methods employed for saliva.
  • Discussion of the advantages of microextraction in overcoming sample volume constraints.
  • Identification of specific microextraction techniques with high potential for saliva analysis.

Conclusions:

  • Microextraction offers a promising avenue for advancing saliva-based bioanalysis.
  • Further research into optimizing microextraction methods for saliva is warranted.
  • Increased focus on microextraction can unlock the full potential of saliva as a diagnostic fluid.