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Related Concept Videos

Gas Chromatography: Introduction01:13

Gas Chromatography: Introduction

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Gas chromatography (GC) is a technique for separating and analyzing volatile compounds in a sample. Its primary purpose is to identify and quantify components in complex mixtures, making it essential in fields such as environmental analysis, pharmaceuticals, and petrochemicals. GC is also called vapor-phase chromatography (VPC) or gas-liquid partition chromatography (GLPC).
In GC,  a sample is vaporized and mixed with an inert carrier gas (the mobile phase), which transports it through a...
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Gas Chromatography: Types of Columns and Stationary Phases01:17

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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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Gas Chromatography–Mass Spectrometry (GC–MS)01:14

Gas Chromatography–Mass Spectrometry (GC–MS)

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Gas chromatography–mass spectrometry (GC–MS) is the combination of analytical techniques of gas chromatography and mass spectrometry in a single instrument for analyzing a mixture of compounds. The gas chromatograph separates the compounds in the mixture, and the mass spectrometer analyzes each compound separately to determine the molecular masses and molecular structures.
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Sample Preparation for Analysis: Overview01:21

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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.
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Sampling Methods: Sample Types01:18

Sampling Methods: Sample Types

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Sampling materials are classified into three main types: solid, liquid, and gas.
Solid samples include a variety of substances, such as sediments from water bodies, soil, metals, and biological tissues. Two standard methods for extracting sediments from water bodies are grab sampling and piston coring. Grab sampling involves using a device to collect a discrete sediment sample from the bottom of a water body with minimal disturbance. Grab samples do not always represent the entire area due to...
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Gas Chromatography: Sample Injection Systems01:08

Gas Chromatography: Sample Injection Systems

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In gas chromatography, the sample is introduced as a vapor plug into the carrier gas stream for high efficiency and resolution. A microsyringe injects the sample solution into a heated sample port, vaporizing it and mixing it with the carrier gas. This process is important to ensure the sample is properly prepared for analysis. Thermally sensitive samples can be injected directly into the column and volatilized by slowly increasing the column temperature.
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Solid-phase-extraction device for extracting volatile organic compounds from gaseous samples.

Ikuo Ueta1, Koki Nakagami2, Yoshihiro Saito2

  • 1Department of Applied Chemistry, University of Yamanashi, 4-3-11 Takeda, Kofu, 400-8511, Japan. iueta@yamanashi.ac.jp.

Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry
|February 25, 2025
PubMed
Summary

Solid-phase extraction (SPE) devices are adapted for analyzing volatile organic compounds in gases. These reusable devices efficiently extract and elute target analytes using a desorption solvent.

Keywords:
Gas chromatographySolid phase extractionVolatile organic compounds

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Area of Science:

  • Analytical Chemistry
  • Environmental Science

Background:

  • Solid-phase extraction (SPE) is a crucial sample preparation method for purifying analytes in liquid samples before instrumental analysis.
  • Traditional SPE devices involve packing adsorbents into cartridges for liquid sample extraction and elution with organic solvents.

Purpose of the Study:

  • To summarize SPE devices specifically designed for the extraction of volatile organic compounds (VOCs) from gaseous samples.
  • To highlight the adaptation of SPE technology for air quality monitoring and analysis.

Main Methods:

  • Review of SPE device designs tailored for gaseous sample matrices.
  • Description of the extraction and elution processes for VOCs using these specialized SPE devices.
  • Discussion on the reusability of SPE devices after adsorbent regeneration.

Main Results:

  • SPE devices for gaseous samples effectively extract target volatile organic compounds.
  • Elution of extracted analytes is achieved by passing a desorption solvent through the device.
  • The adsorbent material within the SPE devices can be dried for subsequent reuse, enhancing cost-effectiveness.

Conclusions:

  • SPE technology offers a viable and efficient method for preparing gaseous samples for the analysis of volatile organic compounds.
  • The described SPE devices provide a reusable and effective solution for environmental monitoring and air quality assessment.