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Related Concept Videos

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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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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Ion Exchange01:17

Ion Exchange

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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

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Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
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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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Gas Chromatography: Types of Columns and Stationary Phases01:17

Gas Chromatography: Types of Columns and Stationary Phases

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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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Related Experiment Video

Updated: Mar 25, 2026

Ion Exchange Chromatography IEX Coupled to Multi-angle Light Scattering MALS for Protein Separation and Characterization
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Crosslinked polymeric ionic liquids as solid-phase microextraction sorbent coatings for high performance liquid

Honglian Yu1, Josias Merib1, Jared L Anderson1

  • 1Department of Chemistry, Iowa State University, Ames, IA 50011, USA.

Journal of Chromatography. A
|February 22, 2016
PubMed
Summary

New polymeric ionic liquid (PIL) coatings for solid-phase microextraction (SPME) offer a novel method for analyzing pharmaceuticals, phenolics, and insecticides using high-performance liquid chromatography (HPLC). These stable PIL-SPME-HPLC systems provide sensitive and accurate detection in real water samples.

Keywords:
High-performance liquid chromatographyPesticidesPharmaceutical drugsPhenolicsPolymeric ionic liquidsSolid-phase microextraction

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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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Ion Exchange Chromatography IEX Coupled to Multi-angle Light Scattering MALS for Protein Separation and Characterization
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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

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Area of Science:

  • Analytical Chemistry
  • Materials Science

Background:

  • Solid-phase microextraction (SPME) is a widely used technique for sample preparation.
  • Polymeric ionic liquids (PILs) offer unique properties for sorbent development.
  • Developing novel SPME sorbents compatible with HPLC is crucial for efficient analysis.

Purpose of the Study:

  • To develop and characterize novel crosslinked polymeric ionic liquid (PIL) sorbent coatings for SPME-HPLC.
  • To evaluate the performance of these PIL-based sorbents for the determination of pharmaceuticals, phenolics, and insecticides.
  • To optimize extraction and desorption conditions using design of experiment (DOE).

Main Methods:

  • Six structurally different PILs were synthesized and crosslinked onto nitinol supports.
  • SPME-HPLC was employed for the analysis of target analytes.
  • DOE was utilized to optimize sampling parameters such as pH, extraction time, and desorption conditions.

Main Results:

  • The developed PIL sorbent coatings demonstrated excellent stability under acidic conditions and in organic solvents.
  • A specific PIL-based sorbent exhibited superior extraction performance compared to others.
  • Optimized method achieved limits of detection (LODs) from 0.2 to 2 μg L⁻¹.
  • Accurate quantification was confirmed by high relative recoveries (50.2%–115.9%) in real water samples.

Conclusions:

  • Novel crosslinked PIL sorbent coatings are effective for SPME-HPLC analysis.
  • The developed method offers sensitive and accurate determination of pharmaceuticals, phenolics, and insecticides.
  • PIL-based SPME-HPLC presents a promising analytical approach for environmental and pharmaceutical monitoring.