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Related Concept Videos

Sample Preparation for Analysis: Overview01:21

Sample Preparation for Analysis: Overview

Sample preparation is an essential step in the analytical process. It involves preparing a sample so that it can be analyzed accurately. The goal is to extract the analyte, the substance you want to measure, from the sample while removing any components that may interfere with the analysis. Sample preparation techniques vary depending on the physical state of the sample.
Bulk or large solid samples are typically reduced in size using grinding, crushing, or milling techniques to increase the...
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.
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Gas Chromatography: Types of Detectors-II01:19

Gas Chromatography: Types of Detectors-II

In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
Size-Exclusion Chromatography01:08

Size-Exclusion Chromatography

In size-exclusion chromatography (SEC), also known as molecular-exclusion or gel-permeation chromatography, molecules are separated based on their sizes. This technique is important for separating large molecules such as polymers and biomolecules. The two classes of micron-sized stationary phases encountered in SEC are silica particles and cross-linked polymer resin beads. Both materials are porous, but their pore sizes vary significantly.
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Analyte Adsorption and Distribution01:09

Analyte Adsorption and Distribution

In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and solvents...

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Related Experiment Video

Updated: Jun 27, 2026

Detection of Regulated Ergot Alkaloids in Food Matrices by Liquid Chromatography-Trapped Ion Mobility Spectrometry-Time-of-Flight Mass Spectrometry
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Detection of Regulated Ergot Alkaloids in Food Matrices by Liquid Chromatography-Trapped Ion Mobility Spectrometry-Time-of-Flight Mass Spectrometry

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Analysis of polycyclic aromatic hydrocarbons in solid matrixes by solid-phase microextraction coupled to a direct

Diana Martin1, Jorge Ruiz

  • 1Food Science, Facultad de Veterinaria UEx., Campus Universitario s/n, 10071 Caceres, Spain.

Talanta
|December 17, 2008
PubMed
Summary

Solid-phase microextraction coupled with a direct extraction device (SPME-DED) effectively analyzes polycyclic aromatic hydrocarbons (PAHs) in food. This rapid method screens for low molecular weight PAHs in solid matrices.

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Gas Chromatography-Mass Spectrometry Paired with Total Vaporization Solid-Phase Microextraction as a Forensic Tool
05:31

Gas Chromatography-Mass Spectrometry Paired with Total Vaporization Solid-Phase Microextraction as a Forensic Tool

Published on: May 25, 2021

Area of Science:

  • Analytical Chemistry
  • Environmental Science
  • Food Science

Background:

  • Polycyclic Aromatic Hydrocarbons (PAHs) are contaminants found in various food products.
  • Accurate detection of PAHs is crucial for food safety and environmental monitoring.
  • Traditional methods for PAH analysis can be time-consuming and destructive.

Purpose of the Study:

  • To evaluate the efficacy of solid-phase microextraction coupled with a direct extraction device (SPME-DED) for PAH analysis.
  • To assess the performance of different SPME fibers for extracting PAHs from model systems.
  • To determine the applicability of the SPME-DED technique for detecting PAHs in smoked meat products.

Main Methods:

  • SPME-DED was used to extract PAHs from gelatine model systems and smoked meat products.
  • Three types of SPME fibers were tested: polydimethylsiloxane (PDMS), divinylbenzene/polydimethylsiloxane (DVB/PDMS), and polyacrylate (PA).
  • Extracted PAHs were analyzed using gas chromatography/mass spectrometry (GC/MS).

Main Results:

  • SPME-DED successfully extracted PAHs with a molecular weight lower than 206 from gelatine systems.
  • All tested SPME fibers demonstrated good reproducibility (RSD 5.24–18.25%), linearity (R² 0.8959–0.9983), and low limits of detection (0.008–0.138 ng mL⁻¹).
  • Low molecular weight PAHs were satisfactorily detected in various smoked meat products using SPME-DED.

Conclusions:

  • SPME-DED is a suitable technique for the rapid, non-destructive screening of low molecular weight PAHs in solid matrices.
  • The method shows promise for routine analysis of PAHs in food products.
  • Further optimization may enhance sensitivity for higher molecular weight PAHs.