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Related Concept Videos

Sample Preparation for Analysis: Overview01:21

Sample Preparation for Analysis: Overview

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.
Bulk or large solid samples are typically reduced in size using grinding, crushing, or milling techniques to increase the...
Sample Preparation for Analysis: Advanced Techniques01:08

Sample Preparation for Analysis: Advanced Techniques

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.
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
Preparation of Samples for Electron Microscopy01:20

Preparation of Samples for Electron Microscopy

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...
Sample Handling01:02

Sample Handling

Transportation of samples from the collection point to the laboratory, as well as storage and preservation techniques, are crucial for maintaining sample integrity and ensuring accurate and reliable test results.
Samples should be transported carefully from collection points to the laboratory. They should be properly sealed and clearly labeled to prevent cross-contamination. To preserve the sample integrity, optimal temperature conditions during transport are essential. This could involve using...

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Related Experiment Video

Updated: Jun 20, 2026

Exploring the Root Microbiome: Extracting Bacterial Community Data from the Soil, Rhizosphere, and Root Endosphere
09:55

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Published on: May 2, 2018

Sample preparation: the forgotten beginning.

Byron Brehm-Stecher1, Charles Young, Lee-Ann Jaykus

  • 1Department of Food Science and Human Nutrition, Iowa State University, Ames, Iowa 50011, USA.

Journal of Food Protection
|September 3, 2009
PubMed
Summary

Food microbiology detection is limited by underdeveloped sample preparation methods. More research is needed on separation and concentration techniques for rapid, direct microorganism identification in foods.

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Last Updated: Jun 20, 2026

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Published on: June 1, 2017

Area of Science:

  • Food microbiology
  • Analytical chemistry
  • Biotechnology

Background:

  • Molecular technologies and automation offer improved microorganism detection.
  • Upstream sample preparation for food matrices remains a significant bottleneck.
  • Current methods limit the full potential of advanced microbial detection in food.

Purpose of the Study:

  • Review the current state of sample preparation in food microbiology.
  • Identify knowledge gaps and opportunities for improving preparative methods.
  • Advocate for increased research and development in food microbial analysis.

Main Methods:

  • Focus on the need to move beyond enrichment culture methods.
  • Highlight the importance of separation and concentration techniques.
  • Discuss treating microorganisms as physicochemical analytes for direct extraction.

Main Results:

  • Separation and concentration steps require extensive research for advancement.
  • Current methods are insufficient for rapid, direct, and quantitative food microbial analysis.
  • Interdisciplinary approaches are necessary to overcome existing limitations.

Conclusions:

  • Significant advancements in food microbiology are hindered by inadequate sample preparation.
  • Further research into separation and concentration is crucial for developing next-generation analytical systems.
  • Increased funding and interdisciplinary collaboration are essential for integrating sample preparation with automated detection.