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Related Concept Videos

High-Performance Liquid Chromatography: Elution Process01:05

High-Performance Liquid Chromatography: Elution Process

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...
Centrifugation01:05

Centrifugation

Centrifugation is a separation technique based on differences in density or size. It is commonly used to separate solids from aqueous interferents. During centrifugation, the sample is placed in centrifugation tubes and spun at high angular velocity, which allows centrifugal force to act differentially on the different densities or masses of the components. After spinning, the supernatant liquid is decanted. Depending on the specific application, either the pellet or the supernatant is retained...
Chromatography: Introduction01:10

Chromatography: Introduction

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...
High-Performance Liquid Chromatography: Introduction01:11

High-Performance Liquid Chromatography: Introduction

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.
In HPLC, two phases play a critical role in the separation process:
Optimizing Chromatographic Separations01:15

Optimizing Chromatographic Separations

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...
Gas Chromatography: Types of Columns and Stationary Phases01:17

Gas Chromatography: Types of Columns and Stationary Phases

Gas chromatography (GC) relies on stationary phases to separate and analyze components in a sample. There are two main types of stationary phases: liquid and solid. Liquid stationary phases are non-volatile, thermally stable, and chemically inert liquids coated onto the column. Solid stationary phases are particles of adsorbent material, such as silica gel or molecular sieves.
For an analyte to remain on the column for a sufficient amount of time, it must exhibit some level of compatibility (or...

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Curtain Flow Column: Optimization of Efficiency and Sensitivity
06:44

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Multiphase flow modeling in centrifugal partition chromatography.

S Adelmann1, C Schwienheer, G Schembecker

  • 1Laboratory of Plant and Process Design, Department of Biochemical and Chemical Engineering, Technische Universität Dortmund, Emil-Figge-Str. 70, 44221 Dortmund, Germany.

Journal of Chromatography. A
|February 18, 2011
PubMed
Summary

Centrifugal Partition Chromatography (CPC) efficiency relies on hydrodynamics. Simulations using OpenFOAM® accurately predict flow patterns, revealing how chamber geometry impacts separation and enabling optimization.

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Area of Science:

  • Chemical Engineering
  • Separation Science
  • Fluid Dynamics

Background:

  • Centrifugal Partition Chromatography (CPC) separation efficiency is governed by solvent systems and chamber hydrodynamics.
  • Key hydrodynamic parameters like stationary phase retention, interfacial area, and backmixing are not fully understood.
  • Predicting these parameters is challenging due to limitations in experimental flow visualization.

Purpose of the Study:

  • To simulate and analyze the three-dimensional hydrodynamics within a rotating FCPC® chamber.
  • To validate simulation results against experimental flow visualization data.
  • To investigate the influence of chamber geometry and Coriolis forces on flow patterns and interfacial area.

Main Methods:

  • Utilized a volume-of-fluid (VOF) method implemented in OpenFOAM® for 3D simulations.
  • Incorporated gravitational, centrifugal, and Coriolis forces into the conservation equation.
  • Validated simulations using optical flow visualization, image processing in ImageJ®, and particle image velocimetry (PIV).

Main Results:

  • Achieved good agreement between simulated and experimental flow patterns and velocity profiles.
  • Demonstrated that increased chamber depth enhances specific interfacial area.
  • Identified a circular stationary phase flow, driven by Coriolis forces, which reduces interfacial area.

Conclusions:

  • The developed 3D simulation model offers a more manageable and predictive alternative to experiments for analyzing CPC hydrodynamics.
  • The model facilitates the optimization of chamber geometry and operating parameters for specific solvent systems.
  • Understanding these hydrodynamic factors is crucial for improving CPC separation efficiency.