Sample Preservation Techniques
Sample Preservation Techniques - Related Videos
08:07
Regulating Temperature in the Lab: Preserving Samples Using Cold
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2023
Preservation of laboratory samples, specimens, and reagents using extreme cold is routinely performed in biomedical research labs. This video will discuss some of the methods for keeping laboratory samples cold and will explain the correct cooling method to use for each experimental requirement. For example, cooling agents, such as ice and dry ice, are typically used when keeping samples cold during experiments. This video discusses the physical properties of the most commonly used cooling...
03:39
Preparation of Formalin-Fixed Paraffin-Embedded Tumor Samples: A Protocol to Preserve Tissue and Cytology Samples from Non-small Cell Lung Cancer (NSCLC)
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2023
This protocol describes the preparation of formalin-fixed paraffin-embedded tumor samples which are used to preserve tissue and cytology samples from non-small cell lung cancer...
02:59
Embedding 3D Spheroids in Agarose Gel Drops: A Technique to Preserve Spheroids for Downstream Analysis
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2023
This video describes the technique to embed 3D spheroids in agarose gel drops for preservation. The embedded 3D spheroids can be further used for downstream analysis.
07:33
Robotic Spleen-Preserving Distal Pancreatectomy: The Warshaw and Kimura Techniques
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Cited by 4 •
2024
Here, we present a step-by-step protocol of robotic spleen preserving distal pancreatectomy, with and without preserving the splenic vessels (i.e., the Kimura and Warshaw techniques, respectively).
04:56
An Efficient Single-Person Technique for Milk Sampling from Laboratory Mice
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2025
This article describes how to assemble a device that can be used to collect milk from laboratory mice. This device is affordable, portable, and allows a collection of 0.1–0.5 mL of milk by one trained person. A detailed milking protocol is also...
FAQs
Cooling and freezing reduce the rate of degradation, helping biological specimens retain usable structure and molecular information for later analysis. Dehydration, chemical fixation, and stabilizing solutions achieve preservation through different conditions rather than serving as interchangeable choices. The relevant approach depends on whether the planned work emphasizes microscopy, histology, molecular analysis, or studies of cells and tissues.
Preservation is not selected solely by the specimen itself; the planned analysis also determines which properties must remain intact. Microscopy and histology may require preserved structural features, whereas molecular analysis depends on retaining relevant molecular composition. Selecting a method according to the sample type and test helps ensure that the resulting material remains suitable for its specific biological investigation.
Temperature, moisture, contamination, and handling are central control points because changes in these conditions can reduce sample quality during preservation or storage. Consistent control helps maintain the specimen’s structure and biological information, while poor control can compromise later analysis. Managing these variables also supports reproducibility by making sample condition more consistent across experiments and collections.
Cooling and freezing, dehydration, chemical fixation, and stabilizing solutions represent different preservation options rather than a single universal procedure. Each approach must be matched to the sample type and the information required from it. This comparison matters because a method suitable for preserving material for microscopy or histology may not be the preferred choice for molecular analysis or cell studies.
A preservation workflow begins by identifying the biological sample and the intended analysis, then selecting a compatible approach such as cooling, freezing, dehydration, fixation, or a stabilizing solution. The chosen conditions should be maintained during handling and storage, with attention to temperature, moisture, contamination, and physical treatment. These controls help preserve quality from collection through analysis.
In biology, preserved samples support microscopy, histology, molecular analysis, cell and tissue studies, and long-term biobanking. Their value extends beyond storage because consistent preservation helps investigators analyze specimens under suitable conditions and compare results more reliably. Maintaining the original structure, molecular composition, and biological information strengthens the connection between the stored material and the experimental question.