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Related Concept Videos

Chromatographic Methods: Terminology01:18

Chromatographic Methods: Terminology

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Chromatography is an analytical technique widely used in fields such as chemistry, biology, environmental science, and pharmaceuticals to separate the components of a mixture and identify substances between them. The process of chromatography is based on the interactions between two distinct phases: the stationary phase and the mobile phase. The stationary phase is fixed in place by a supporting material, while the mobile phase moves over it, carrying the solutes. As the mobile phase travels,...
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Chromatography: Introduction01:10

Chromatography: Introduction

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Chromatography is a technique used to separate compounds based on differences of partitioning between two phases, the stationary phase and the mobile phase.
The phase in which the compounds linger or on which the compounds adsorb is called the stationary phase, whereas the mobile phase is the solvent that carries the solutes to be analyzed. In traditional column chromatography, the mixture flows through the stationary phase, and the compounds partition between the stationary and mobile phases...
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Chromatographic Methods: Classification01:12

Chromatographic Methods: Classification

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Chromatographic techniques are classified in three ways: the classification is based on the physical state of the stationary and mobile phases, how the mobile phase and the stationary phase contact each other, or through the chemical or physical processes that isolate the components of the sample. Typically, the mobile phase is either a liquid or gas, while the stationary phase is either a solid or a liquid layer applied to a solid surface.
Chromatographic techniques are typically named by...
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Chromatographic Resolution01:15

Chromatographic Resolution

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In chromatography, a solute moves through a chromatographic column and tends to spread, forming a Gaussian-shaped band. The longer the solute spends in the column, the broader the band becomes. The broadening can lead to overlaps within the column, affecting separation effectiveness.
The effectiveness of separation can be evaluated by determining the level of separation between two neighboring peaks in a chromatogram, which represents the individual components of a sample.
In chromatography,...
2.4K
Affinity Chromatography01:03

Affinity Chromatography

3.3K
Affinity chromatography is a powerful technique extensively utilized for separating and purifying specific biomolecules from complex mixtures. It capitalizes on the highly selective binding between an analyte and its counterpart, such as antibody-antigen interactions. The counterpart is immobilized on the stationary phase, forming an affinity column. The stationary phase typically consists of solid support, such as agarose or porous glass beads, immobilizing the affinity ligand. The mobile...
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Optimizing Chromatographic Separations01:15

Optimizing Chromatographic Separations

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Optimizing chromatographic separations is crucial for obtaining clean separations in a minimum amount of time. Optimization is required for several factors, including kinetic effects related to band broadening, plate height, capacity factor, and separation factor.
Band broadening refers to spreading solute bands as they travel through the column. This broadening can impact resolution. Plate height (H) represents the length required for one theoretical plate. A lower plate height corresponds to...
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Related Experiment Video

Updated: Mar 14, 2026

Chromatographic Fingerprinting by Template Matching for Data Collected by Comprehensive Two-Dimensional Gas Chromatography
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Visualizing small differences using subtractive chromatographic analysis.

Kerstin Zawatzky1, Mikhail Reibarkh1, Nicole Canfield2

  • 1Department of Process Research & Development, Merck Research Laboratories, Rahway, NJ, USA.

Journal of Chromatography. A
|September 25, 2016
PubMed
Summary
This summary is machine-generated.

Subtractive chromatographic analysis effectively visualizes small sample differences (~1%) in pharmaceutical research. Peak alignment and fast data processing are key to overcoming artifacts for accurate results.

Keywords:
High throughput analysisMultiple injections in a single experimental runPeak alignmentSubtractive chromatography

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Area of Science:

  • Analytical Chemistry
  • Pharmaceutical Analysis
  • Chromatography

Background:

  • Chromatographic subtraction is a known technique for highlighting sample variations.
  • This method is underutilized in modern analytical and pharmaceutical research.
  • Detecting subtle differences is crucial in pharmaceutical development.

Purpose of the Study:

  • To investigate the application of subtractive chromatographic analysis in pharmaceutical research.
  • To demonstrate the utility of this technique for detecting small sample variations.
  • To address challenges and optimize methods for subtractive analysis.

Main Methods:

  • Utilized subtractive chromatographic analysis on different sample types.
  • Investigated artifact elimination, particularly peak misalignment.
  • Employed peak alignment, fast detector sampling, and data interpolation techniques.

Main Results:

  • Subtractive analysis successfully visualized small differences (approximately 1%) between samples.
  • Elimination of artifacts, especially peak misalignment, was critical for accurate visualization.
  • Optimized methods enable convenient detection of subtle variations.

Conclusions:

  • Subtractive chromatographic analysis is a valuable tool for pharmaceutical research.
  • The technique shows potential for high-throughput screening and process adsorbent evaluation.
  • Addressing peak misalignment is essential for reliable application of this method.