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Related Concept Videos

High-Performance Liquid Chromatography: Instrumentation00:57

High-Performance Liquid Chromatography: Instrumentation

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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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Development of Analytical Methods01:21

Development of Analytical Methods

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An analytical methodology can be divided into four sequential steps: technique, method, procedure, and protocol. A technique is a scientific principle that rationalizes a specific phenomenon through chemical measurements. Adapting a technique for analyzing a sample of interest is termed a method. The procedure outlines the directions for performing the analysis via an analytical method. The protocol is the detailed guidelines on the procedure, which should be strictly followed to obtain the...
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High-Performance Liquid Chromatography: Elution Process01:05

High-Performance Liquid Chromatography: Elution Process

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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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High-Performance Liquid Chromatography: Types of Detectors01:15

High-Performance Liquid Chromatography: Types of Detectors

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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

High-Performance Liquid Chromatography: Introduction

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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.
In HPLC, two phases play a critical role in the separation process:
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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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Related Experiment Video

Updated: Aug 23, 2025

Untargeted Metabolomics from Biological Sources Using Ultraperformance Liquid Chromatography-High Resolution Mass Spectrometry UPLC-HRMS
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Chemometric Strategies for Fully Automated Interpretive Method Development in Liquid Chromatography.

Tijmen S Bos1,2, Jim Boelrijk3,2,4, Stef R A Molenaar5,2

  • 1Division of Bioanalytical Chemistry, Amsterdam Institute of Molecular and Life Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1085, 1081HVAmsterdam, The Netherlands.

Analytical Chemistry
|November 1, 2022
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Summary
This summary is machine-generated.

A new open-source algorithm automates liquid chromatography (LC) method development. This "AutoLC" system uses machine learning or retention modeling to optimize separations efficiently within 4-10 iterations.

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Area of Science:

  • Analytical Chemistry
  • Chromatography

Background:

  • Conventional liquid chromatography (LC) method development relies heavily on analyst expertise.
  • Automated approaches are needed to improve efficiency and reproducibility in LC method development.

Purpose of the Study:

  • To develop a novel, open-source algorithm for automated and interpretive LC method development.
  • To create a closed-loop workflow for unsupervised, automated LC system interaction.

Main Methods:

  • Developed an open-source algorithm, "AutoLC," for automated LC(-mass spectrometry) separations.
  • Investigated challenges in peak tracking, retention modeling, gradient profile design, and chromatogram simulation.
  • Tested two strategies: retention modeling and Bayesian optimization machine learning.

Main Results:

  • The algorithm achieved optimal performance within 4-10 iterations using both tested strategies.
  • Retention modeling proved more efficient but dependent on peak tracking.
  • Bayesian optimization offered flexibility but faced scalability limitations.

Conclusions:

  • The developed algorithm enables efficient, automated LC method development.
  • The modular design ensures compatibility with existing and future LC data handling algorithms.
  • AutoLC offers a powerful tool for optimizing LC separations based on resolution and analysis time.