Thin Layer Chromatography
Thin Layer Chromatography - Related Videos
03:07
Thin-Layer Chromatography - Concepts
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2020
Chromatography Chromatography is a technique used in organic chemistry to separate compounds in a mixture based on their differences in solubility between two different phases. The concept is similar to liquid-liquid extraction, except in chromatography, the two phases consist of the stationary phase and the mobile phase. The stationary phase is a solid — typically a microscale hydrogel bead — while the mobile phase is a carrier solvent. In traditional chromatography, the stationary phase is...
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Thin-Layer Chromatography - Instructor Prep
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2020
Source: Lara Al Hariri at the University of Massachusetts Amherst, MA, USA Preparation of SolutionsExpand Here, we show the laboratory preparation for 10 students working in pairs, with some excess. Please adjust quantities as needed. Before getting started, put on a lab coat, safety glasses, and nitrile gloves. You'll be working with hexane, ethanol, and ethyl acetate, which all permeate thin nitrile gloves within minutes, so change your gloves promptly if you get any solvent on them.
14:32
Thin-Layer Chromatography - Student Protocol
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2020
Source: Lara Al Hariri and Ahmed Basabrain at the University of Massachusetts Amherst, MA, USA Effects of Mobile Phase Composition on Compound SeparationExpand In this section of the lab, you will use TLC to compare how well pure hexane and a mixture of 60% hexane and 40% ethyl acetate can separate phenol, benzoic acid, and butyl phenyl ether by measuring the distance the compound traveled in each solvent. Before starting the lab, put on a lab coat, safety glasses, and nitrile gloves.
09:48
Performing 1D Thin Layer Chromatography
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2023
Source: Laboratory of Dr. Yuri Bolshan — University of Ontario Institute of Technology Thin layer chromatography (TLC) is a chromatographic method used to separate mixtures of non-volatile compounds. A TLC plate consists of a thin layer of adsorbent material (the stationary phase) fixed to an appropriate solid support such as plastic, aluminum, or glass1. The sample(s) and reference compound(s) are dissolved in an appropriate solvent and applied near the bottom edge of the TLC plate in small...
06:04
Thin Layer Chromatography Based Enzyme Activity Assay: A Technique to Determine In Vitro Pyrophosphokinase Activity Using Thin Layer Chromatography
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2025
This video demonstrates a thin-layer chromatography-based enzyme assay to determine pyrophosphokinase activity using radiolabeled nucleotides. The method provides insights into nucleotide synthesis and phosphotransfer reactions.
FAQs
Migration reflects the balance between a compound’s adsorption to the coated stationary phase and its solubility in the moving solvent. Compounds that interact differently with the silica or alumina coating therefore travel different distances. The resulting separation allows researchers to distinguish components within extracts and assess whether a sample contains one major compound or several constituents.
Rf values provide a comparative measure of how far a compound migrated relative to the solvent movement. Researchers can compare these values and the resulting spot patterns among samples to support qualitative identification or detect differences in composition. Similar profiles may indicate related chemical content, whereas altered profiles can reveal changes in metabolites, lipids, pigments, or bioactive compounds.
The coating and solvent system influence the competing effects of adsorption and solubility that control compound migration. Silica and alumina provide the stationary phase, while the selected solvent carries dissolved sample components across the plate. Because compounds respond differently to these conditions, changing the separation system can alter spot spacing and improve comparison of complex extracts.
Researchers place a small sample spot near one edge of a coated silica or alumina plate, then expose the plate to a solvent. The solvent rises through the stationary phase by capillary action, carrying mixture components at different rates. After development, the separated spots are examined and compared by their positions or Rf values to evaluate sample composition.
Infection studies can apply TLC to microbial lipids, small-molecule metabolites, pigments, extracted antibiotics, and other bioactive compounds. Profiling these materials helps researchers compare chemical composition among microbial or pathogen-associated samples. The method can also support purity assessment, helping distinguish a relatively simple preparation from an extract containing multiple chemical components.
Thin Layer Chromatography offers an accessible, rapid way to obtain qualitative chemical profiles before or alongside more instrument-intensive analyses. In immunology and infection research, those profiles can support sample identification, purity assessment, and comparisons of metabolic changes linked to pathogens or immune-related processes. Its results provide a practical screening or comparison step rather than replacing detailed instrumental characterization.