Sample Solution Loading
Sample Solution Loading - Related Videos
11:36
Assembly, Loading, and Alignment of an Analytical Ultracentrifuge Sample Cell
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Cited by 21 •
2009
The analytical ultracentrifuge (AUC) sample cell holds sample and reference buffer and during experiments and is exposed to high vacuum and rotor speeds up to 60,000 rpm. This video will demonstrate the rigorous attention to detail necessary for assembly, loading and alignment of this very important component of an AUC experiment.
03:40
Plaque Assay–Based Quantification of Viral Load in an Infected Mouse Tissue Sample
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2026
Source: Morales Vasquez, D., et al. Live Imaging and Quantification of Viral Infection in K18 hACE2 Transgenic Mice Using Reporter-Expressing Recombinant SARS-CoV-2. J. Vis. Exp. (2021)This video demonstrates the protocol for carrying out plaque assay–based viral titration for quantifying infectious virus levels in tissue sample collected from a virus–infected mouse model.
09:49
Solutions and Concentrations
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2023
Source: Laboratory of Dr. Michael Evans — Georgia Institute of Technology A solution is a homogeneous mixture containing some components in small amounts, called solutes, and one component in a large amount, called the solvent. Solid-liquid solutions contain one or more solid solutes dissolved in a liquid solvent. Solutions are ubiquitous in chemistry: they are used to store and handle small amounts of material, carry out chemical reactions, and develop materials with controllable properties.
11:43
Dissolved Solute Sampling Across an Oxic-Anoxic Soil-Water Interface Using Microdialysis Profilers
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Cited by 6 •
2023
A microdialysis profiler is described to sample dissolved porewater solutes across an oxic-anoxic soil-water interface in situ with minimal disturbance. This device is designed to capture rapid changes in concentration-depth profiles induced by disturbances at the soil-water interface and beyond.
07:27
Making Solutions in the Laboratory
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2023
The ability to successfully make solutions is a basic laboratory skill performed in virtually all biological and chemical experiments. A solution is a homogenous mixture of solute dissolved in bulk liquid known as the solvent. Solutions can be described by their solute concentration, a measure of how much solute is present per unit of solution. In this video, a step-by-step procedure for how to make a water-based, or aqueous, solution for biological applications is presented. The video...
FAQs
A calibrated pipette or dispensing tool helps deliver the defined volume required by the analytical method. Consistent volume supports comparable sample amounts across wells, tubes, channels, or other vessels, which is especially important when results depend on separation, detection, or quantitative comparison. Variability at this stage can reduce reproducibility and make differences between samples harder to interpret.
Bubbles can interfere with consistent sample placement and may affect how a sample occupies the analytical vessel. Avoiding them helps preserve the intended loading pattern and supports reliable processing and measurement. This concern is relevant whenever sample location or volume influences downstream separation, detection, or comparison, including gel electrophoresis, microplate assays, and channel-based analyses.
Maintaining sample integrity ensures that the material entering the analytical vessel remains suitable for processing and measurement. Contamination control prevents unwanted material from entering a sample, while careful handling reduces transfer between different samples. These safeguards are essential for trustworthy comparisons because contamination or sample alteration can affect the observed result rather than the biology being studied.
A tube, well, channel, or other analytical vessel may serve a different role in how the sample is processed and measured. Loading must therefore place the prepared material appropriately while preserving its defined volume and condition. This vessel-specific attention supports applications ranging from gel electrophoresis and microplate assays to chromatography and cell-based analyses.
A reliable workflow begins with a prepared biological sample and a calibrated pipette or related dispensing tool. The operator delivers the defined volume into the intended tube, well, channel, or analytical vessel, while avoiding bubbles, contamination, and transfer between samples. Careful placement and consistent handling then support the processing and measurement that follow.
This procedure supports several analytical settings, including gel electrophoresis, microplate assays, chromatography, and cell-based analyses. Although the vessels and downstream measurements differ, each application depends on placing a prepared sample consistently and preserving its integrity. Accurate loading helps these methods produce interpretable separation, detection, or quantitative comparison between biological samples.
Accurate loading improves confidence that observed differences reflect the samples or the analytical process rather than inconsistent transfer. Defined volume, proper placement, preserved sample integrity, and controlled contamination together promote reproducibility. As a result, researchers can interpret separation, detection, and quantitative comparisons more reliably across samples and across analytical formats.