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Related Concept Videos

Thin-Layer Chromatography (TLC): Overview01:11

Thin-Layer Chromatography (TLC): Overview

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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...
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High-Performance Liquid Chromatography: Instrumentation00:57

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High-performance liquid chromatography, or HPLC, is an analytical technique that separates liquid samples under high pressures. An HPLC instrument consists of glass bottles for storing solvents called mobile phase reservoirs. HPLC-grade solvents are used to maintain high purity, and the dissolved gases are removed using a degasser, such as a vacuum pumping system or sparging with helium. The solvents are then pumped into the analytical column using a screw-driven syringe or reciprocating pumps.
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High-Performance Liquid Chromatography: Types of Detectors01:15

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The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte...
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High-Performance Liquid Chromatography: Introduction01:11

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High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
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High-Performance Liquid Chromatography: Elution Process01:05

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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...
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Gas Chromatography–Mass Spectrometry (GC–MS)01:14

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Gas chromatography–mass spectrometry (GC–MS) is the combination of analytical techniques of gas chromatography and mass spectrometry in a single instrument for analyzing a mixture of compounds. The gas chromatograph separates the compounds in the mixture, and the mass spectrometer analyzes each compound separately to determine the molecular masses and molecular structures.
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Updated: Dec 18, 2025

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Next-Generation TLC: A Quantitative Platform for Parallel Spotting and Imaging.

Alexander A Boulgakov1, Sarah R Moor2, Hyun Hwa Jo2

  • 1Center for Systems and Synthetic Biology/Institute for Cellular and Molecular Biology, Department of Molecular Biosciences, The University of Texas at Austin, Austin, Texas 78712, United States.

The Journal of Organic Chemistry
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A novel high-throughput screening method uses thin-layer chromatography (TLC) imaging to simultaneously analyze up to 48 reactions. This cost-effective approach quantifies reaction completion using a smartphone and custom-built equipment.

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Area of Science:

  • Analytical Chemistry
  • Chemical Synthesis
  • High-Throughput Screening

Background:

  • Traditional reaction monitoring can be time-consuming and labor-intensive.
  • There is a need for efficient methods to analyze multiple reactions in parallel.
  • Thin-layer chromatography (TLC) is a versatile separation technique.

Purpose of the Study:

  • To develop a high-throughput screening (HTS) approach for simultaneous analysis and quantification of chemical reactions.
  • To adapt thin-layer chromatography (TLC) for rapid, parallel reaction monitoring.
  • To create a cost-effective imaging and sample application system for TLC.

Main Methods:

  • Developed a high-throughput screening (HTS) method utilizing thin-layer chromatography (TLC) imaging.
  • Utilized a smartphone and a custom-built UV/vis light box for TLC plate imaging.
  • Constructed a LEGO-based spotting device for efficient sample transfer from well-plates to TLC plates.
  • Employed custom software for detecting and quantifying TLC spot intensities to determine reaction conversion.

Main Results:

  • Successfully monitored 48 parallel thiol conjugate addition reactions to a Meldrum's acid derivative.
  • Achieved quantitative determination of the percent conversion for all 48 reactions in a single analysis.
  • Demonstrated the feasibility of using a smartphone for quantitative TLC imaging.
  • Validated a cost-effective and accessible HTS method for reaction monitoring.

Conclusions:

  • The developed TLC imaging method provides a robust and high-throughput approach for reaction analysis.
  • This method offers a low-cost alternative to conventional HTS techniques.
  • The system enables efficient and quantitative monitoring of multiple chemical transformations simultaneously.