Tlc Separation
Tlc Separation - Related Videos
12:04
Thin-layer Chromatographic (TLC) Separations and Bioassays of Plant Extracts to Identify Antimicrobial Compounds
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Cited by 52 •
2014
Methods are described for thin-layer chromatographic (TLC) separation of plant extracts and contact bioautography to identify antibacterial metabolites. The methods are applied to the screening of red clover phenolic compounds inhibiting hyper ammonia-producing bacteria (HAB) native to the bovine rumen.
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Thin-Layer Chromatography (TLC): Overview
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2025
Thin-layer chromatography (TLC) is a chromatography technique that separates compounds based on their polarity. TLC typically uses polar silica gel, a form of silicon dioxide, as the stationary phase. The silica gel contains hydroxyl (OH) groups on its surface, which form hydrogen bonds with polar compounds, influencing their adhesion to the stationary phase. To begin the analysis, a mixture of compounds is spotted on the starting line on the TLC plate using a thin capillary. The bottom of the...
13:02
Arabidopsis thaliana Polar Glycerolipid Profiling by Thin Layer Chromatography (TLC) Coupled with Gas-Liquid Chromatography (GLC)
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Cited by 102 •
2011
Composition of polar lipid extracts and the fatty acid composition of individual glycerolipids are determined in a simple and robust lipid profiling experiment. For this purpose, glycerolipids are isolated by thin layer chromatography and subjected to transmethylation of their acyl groups. Fatty acyl methylesters are quantified by gas-liquid chromatography.
03:26
Thin Layer Chromatography-Based Separation of Mycolic Acid Variants: A Method to Separate Mycobacterial Cell Wall Lipids Based on Polarity
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2025
This video demonstrates the thin-layer chromatography-based separation of mycolic acids. This technique separates the different mycolic acids—long-chain lipids present in the cell wall of mycobacteria—based on their polarity.
08:02
Separation of Mixtures via Precipitation
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2023
Source: Laboratory of Dr. Ana J. García-Sáez — University of Tübingen Most samples of interest are mixtures of many different components. Sample preparation, a key step in the analytical process, removes interferences that may affect the analysis. As such, developing separation techniques is an important endeavor not just in academia, but also in industry. One way to separate mixtures is to use their solubility properties. In this short paper, we will deal with aqueous solutions. The...
FAQs
Different compounds in a mixture respond differently to the stationary and mobile phases. A molecule with stronger adsorption to the plate tends to remain closer to its starting position, while greater solubility in the moving solvent can carry it farther. Polarity helps explain these differences, so separated spot positions provide comparative evidence about mixture components.
The stationary phase provides the surface where sample components are retained, while the mobile solvent transports them upward. Their relative adsorption and solubility determine how far each component moves. Changing the solvent can therefore alter the separation pattern and helps researchers evaluate which solvent is suitable for analyzing a mixture.
Retention factors convert spot positions into values that can be compared. Each value relates the distance traveled by a component to the distance traveled by the solvent front. Spots with different values indicate different movement through the plate, allowing chemists to assess mixture composition and distinguish components more systematically than visual position alone.
A TLC separation run starts by placing a small sample spot on the coated plate, then positioning the plate so the solvent can move upward as the mobile phase. After development, researchers compare the spots produced by the mixture. This workflow uses simple components and quickly supplies evidence about how many distinguishable components are present.
Solvent selection is one of TLC separation's practical uses. Researchers can compare how far mixture components travel in candidate solvents, then use the observed pattern to choose conditions for further work. This screening is especially relevant before column chromatography, because TLC can guide the solvent choice without immediately committing to the larger purification procedure.
In chemistry, TLC separation can be used at several decision points: monitoring reaction progress, assessing sample purity, and examining mixture composition. A changing spot pattern can indicate that the material being examined has changed, while multiple spots can reveal that more than one component is present. The method therefore links quick analysis with practical laboratory decisions.