Co-extractive Removal
Co-extractive Removal - Related Videos
04:14
Msp1 Extraction Assay to Study the Removal of Mislocalized TA Proteins
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2025
This video demonstrates an in vitro protocol to study the Msp1-mediated removal of mislocalized TA proteins integrated into the lipid bilayer of liposomes. Msp1 and TA proteins are co-reconstituted into liposomes, and the ATP-dependent translocation of TA proteins is confirmed through affinity purification.
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Procedure to Evaluate the Efficiency of Flocculants for the Removal of Dispersed Particles from Plant Extracts
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Cited by 6 •
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The design-of-experiments procedure presented here allows the evaluation of different flocculants in terms of their ability to aggregate dispersed particles in plant extracts, thus reducing turbidity and the costs of downstream processing.
11:06
Comparison of Tobacco Host Cell Protein Removal Methods by Blanching Intact Plants or by Heat Treatment of Extracts
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Three heat precipitation methods are presented that effectively remove more than 90% of host cell proteins (HCPs) from tobacco extracts prior to any other purification step. The plant HCPs irreversibly aggregate at temperatures above 60 °C.
06:43
Rotary Evaporation to Remove Solvent
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2023
Source: Dr. Melanie Pribisko Yen and Grace Tang — California Institute of Technology Rotary evaporation is a technique most commonly used in organic chemistry to remove a solvent from a higher-boiling point compound of interest. The rotary evaporator, or "rotovap", was invented in 1950 by the chemist Lyman C. Craig. The primary use of a rotovap is to dry and purify samples for downstream applications. Its speed and ability to handle large volumes of solvent make rotary evaporation a preferred...
02:55
Extraction - Concepts
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2020
Extraction Extraction is a common technique used in organic chemistry to isolate a target compound. In the extraction process, a solute is transferred from one phase to another to separate it from unreacted starting materials or impurities. Extraction is also used to facilitate the isolation of a solute from a reaction solvent that is difficult to remove by evaporation, such as a solvent with a high boiling point. Generally, there are three types of extractions. First, in solid-liquid...
FAQs
The cleanup separates matrix compounds from the analyte by exploiting differences in chemical behavior. In liquid-liquid partitioning, compounds distribute differently between liquid phases according to solubility and polarity. Sorbents retain selected compounds through adsorption or other molecular interactions, while filtration removes separable material. The successful condition is one that reduces matrix components without removing a significant portion of the analyte.
Matrix compounds can interfere with the analytical signal, obscure the target response, contaminate instrumentation, or alter how strongly the analyte is detected. These effects make measured concentrations less reliable because the instrument may no longer respond to the analyte in the same way as it would in a cleaner extract. Removing co-extractives therefore supports more dependable chromatographic and spectrometric measurements.
Extraction focuses on transferring the target analyte into a working extract, whereas co-extractive removal adds selectivity against compounds transferred along with it. The cleanup step uses partitioning, sorbent interactions, or filtration to reduce unwanted material after or during extraction. This distinction matters because a high analyte recovery alone does not guarantee a clean extract or reliable subsequent analysis.
A typical workflow begins by preparing an extract containing the target analyte and accompanying matrix compounds. The extract is then subjected to a suitable cleanup, such as liquid-liquid partitioning, sorbent treatment, or filtration. The treated fraction is retained as the working extract for chromatographic or spectrometric analysis, with the procedure judged by cleaner composition and preserved analyte measurement.
Selection depends on which chemical differences can best separate the matrix from the analyte. Liquid-liquid partitioning is appropriate when compounds show useful differences in polarity or solubility, whereas sorbent cleanup relies on selective adsorption or molecular interactions. Filtration may be used when unwanted material can be separated physically. The chosen approach should reduce co-extractives while retaining the analyte.
Cleaner extracts can improve the reliability of chromatographic and spectrometric workflows in several ways. They reduce signal obscuration, limit contamination of analytical instruments, and lessen changes in analyte response caused by the surrounding matrix. As a result, quantification can become more accurate, and overall method performance can improve when complex samples would otherwise interfere with measurement.