Water Elution
Water Elution - Related Videos
01:05
High-Performance Liquid Chromatography: Elution Process
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2024
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...
07:28
A Small Volume Procedure for Viral Concentration from Water
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Cited by 5 •
2015
An approach was developed for identifying optimal viral concentration conditions for small volume water samples using spikes of human adenovirus. The techniques described here are used to identify concentration parameters for other viral targets, and applied to large-scale viral concentration experimentation.
11:26
Water in Oil Emulsions: A New System for Assembling Water-soluble Chlorophyll-binding Proteins with Hydrophobic Pigments
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Cited by 2 •
2016
This manuscript describes a simple and high-throughput method for assembling water-soluble proteins with hydrophobic pigments that is based on water-in-oil emulsions. We demonstrate the effectiveness of the method in the assembly of native chlorophylls with four variants of recombinant water-soluble-chlorophyll binding proteins (WSCPs) of Brassica plants expressed in E. coli.
11:38
CN-GELFrEE - Clear Native Gel-eluted Liquid Fraction Entrapment Electrophoresis
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Cited by 11 •
2016
This protocol describes how to prepare and perform clear native gel-eluted liquid fraction entrapment electrophoresis (CN-GELFrEE), a native separation technique for non-covalent biomolecular assemblies and proteins from heterogeneous samples that is compatible with various downstream protein analysis techniques.
01:23
States of Water
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2019
Water exists in any one of the three classical states: solid (ice), liquid (water), and gas (steam or water vapor). The state of water depends on i) the intermolecular forces that draw molecules together and ii) the kinetic energy that leads to movements that pull them apart. Water freezes when the intermolecular forces are greater than the kinetic energy. Unlike most other substances, water is less dense in its solid state than in its liquid state. This is because each water molecule can form...
FAQs
Elution order reflects how strongly each dissolved compound interacts with the stationary phase relative to water. Compounds with weaker retention remain preferentially in the flowing water and leave earlier, whereas stronger polarity-related, charge-based, or hydrogen-bonding interactions delay movement. These differences allow a mixture to separate as it passes through the stationary material.
Water-soluble compounds can remain in the mobile phase while still experiencing different degrees of attraction to the stationary phase. That balance permits compounds to move through the material at distinguishable rates. As a result, water elution can separate or recover dissolved substances without requiring a mobile phase selected for compounds that have limited solubility in water.
Changing flow conditions alters how long compounds remain in contact with the stationary phase, which can influence their movement and separation. Adjusting the composition of the water can also change the balance of solubility and stationary-phase interactions. These controls help improve selectivity, the ability to distinguish compounds, and recovery, the amount obtained after separation.
A sample containing dissolved compounds is introduced to a column or other solid-phase material, and water is then passed through the stationary phase. Compounds move at different rates as they partition between the water and solid material. The exiting material can be collected in fractions, allowing separated portions of the mixture to be retained for further use.
This approach is useful when the target compounds are water-soluble and need to be separated from other dissolved substances or unwanted components. In purification, differences in retention help isolate portions of a mixture. For desalting, passage through the stationary material supports removal of salts or similar retained or unretained components, depending on their interactions with the system.
Collected fractions preserve the sequence in which compounds leave the stationary phase. Earlier fractions contain substances that are less strongly retained, while later fractions contain substances with stronger interactions under the selected conditions. Comparing the fractions can therefore show how effectively the mixture has been separated and identify portions suitable for recovery or additional processing.