Tlc Monitoring
Tlc Monitoring - Related Videos
12:04
Thin-layer Chromatographic (TLC) Separations and Bioassays of Plant Extracts to Identify Antimicrobial Compounds
0 Views •
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.
01:11
Thin-Layer Chromatography (TLC): Overview
0 Views •
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)
0 Views •
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.
06:14
Estimating the Yield of Compounds on the TLC Plate via the Blue-LED Illumination Technique
0 Views •
Cited by 1 •
2022
The present protocol developed a method to estimate the yield of compounds on the TLC plate using the blue-LED illumination technique. The advantages of this approach are that it is safe, effective, inexpensive, and allows the researcher to measure multiple samples simultaneously.
02:05
Self-Presentation: Self-Monitoring and Self-Handicapping
0 Views •
2020
People can go to great lengths to protect their self-image and present themselves in ways that they want others to see them. Sociologist Erving Goffman presented the idea that a person is like an actor on a stage. Calling his theory dramaturgy, Goffman believed that we use “impression management” to present ourselves to others as we hope to be perceived. Each situation is a new scene, and individuals perform different roles depending on who is present (Goffman, 1959). Think about the way you...
FAQs
Compounds migrate different distances because separation reflects the balance between adsorption to the stationary phase and solubility in the moving solvent. A compound that interacts more strongly with the stationary phase tends to travel less, whereas one that remains more soluble in the solvent can migrate farther. These differences produce separated spots from a combined sample.
Rf values provide a standardized way to report how far a compound migrates on the plate. Comparing the Rf values of sample spots with starting materials, products, or standards can support substance identification and reaction assessment. The comparison is most useful when the samples produce distinguishable migration patterns under the same monitoring conditions.
The stationary phase provides the surface where compounds are adsorbed as the solvent moves through the plate. Silica gel is one stationary phase identified for this purpose, although other materials can also be used. Differences in adsorption strength help separate mixture components, making their individual migration distances available for comparison.
A sample is first spotted onto a plate containing silica gel or another stationary phase. The plate is then exposed to a solvent, which carries the compounds upward by capillary action. After migration produces separated spots, the sample can be compared with starting materials, products, or standards to evaluate composition and reaction progress.
TLC monitoring supports reaction-completion judgments by comparing a reaction sample with the starting material and expected product. Changes in the observed spot pattern and migration distances can indicate whether the starting substance remains and whether product formation is occurring. This rapid assessment helps chemists decide whether conditions require adjustment or further reaction time.
Synthetic chemists use TLC monitoring for rapid optimization and troubleshooting during reaction development. It can help compare conditions and guide selection of an approach before applying more detailed analyses. Because the method provides quick information about composition and progress, it is useful for making timely decisions while refining a chemical procedure.